S-1312xxxH (Seiko)
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

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S-1312xxxH Series
www.sii-ic.com
105°C OPERATION LOW CURRENT CONSUMPTION
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
© SII Semiconductor Corporation, 2015
Rev.1.1_01
The S-1312xxxH Series, developed by using the CMOS technology, is a positive voltage regulator IC which has low current
consumption, high ripple-rejection and low dropout voltage.
Even with low current consumption of 20 μA typ., it has high ripple-rejection of 75 dB typ., and a ceramic capacitor of 0.22 μF
or more can be used as the input and output capacitors.
It also has high-accuracy output voltage of ±1.0%.
Features
Output voltage:
Input voltage:
Output voltage accuracy:
Dropout voltage:
Current consumption:
Output current:
Input and output capacitors:
Ripple rejection:
Built-in overcurrent protection circuit:
Built-in thermal shutdown circuit:
Built-in ON / OFF circuit:
Pull-down resistor is selectable.
Discharge shunt function is selectable.
Operation temperature range:
Lead-free (Sn 100%), halogen-free
1.0 V to 3.5 V, selectable in 0.05 V step
1.5 V to 5.5 V
±1.0% (1.0 V to 1.45 V output product: ±15 mV)
160 mV typ. (2.8 V output product, IOUT = 100 mA)
During operation: 20 μA typ., 30 μA max.
During power-off: 0.1 μA typ., 1.0 μA max.
Possible to output 150 mA (VIN VOUT(S) + 1.0 V)*1
A ceramic capacitor of 0.22 μF or more can be used.
75 dB typ. (1.2 V output product, f = 1.0 kHz)
70 dB typ. (2.85 V output product, f = 1.0 kHz)
Limits overcurrent of output transistor.
Prevents damage caused by heat.
Ensures long battery life.
Ta = 40°C to +105°C
*1. Please make sure that the loss of the IC will not exceed the power dissipation when the output current is large.
Applications
Constant-voltage power supply for battery-powered device
Constant-voltage power supply for home electric appliance
Packages
SOT-23-5
HSNT-4 (1010)
1


S-1312xxxH (Seiko)
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1312xxxH Series
Rev.1.1_01
Block Diagrams
1. S-1312xxxH Series A type
VIN
Overcurrent
protection circuit
Thermal shutdown circuit
*1
VOUT
Function
ON / OFF logic
Discharge shunt
function
Pull-down resistor
Status
Active "H"
Available
Available
ON / OFF
ON / OFF circuit
+
Reference
voltage circuit
*1
VSS
*1. Parasitic diode
2. S-1312xxxH Series B type
VIN
Overcurrent
protection circuit
Thermal shutdown circuit
Figure 1
*1
VOUT
Function
ON / OFF logic
Discharge shunt
function
Pull-down resistor
Status
Active "H"
Available
Unavailable
ON / OFF
ON / OFF circuit
+
Reference
voltage circuit
*1
VSS
*1. Parasitic diode
Figure 2
2


S-1312xxxH (Seiko)
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_01
S-1312xxxH Series
3. S-1312xxxH Series C type
VIN
Overcurrent
protection circuit
Thermal shutdown circuit
*1
VOUT
Function
ON / OFF logic
Discharge shunt
function
Pull-down resistor
Status
Active "H"
Unavailable
Available
ON / OFF
ON / OFF circuit
+
Reference
voltage circuit
VSS
*1. Parasitic diode
4. S-1312xxxH Series D type
VIN
Overcurrent
protection circuit
Thermal shutdown circuit
Figure 3
*1
VOUT
Function
ON / OFF logic
Discharge shunt
function
Pull-down resistor
Status
Active "H"
Unavailable
Unavailable
ON / OFF
ON / OFF circuit
+
Reference
voltage circuit
VSS
*1. Parasitic diode
Figure 4
3


S-1312xxxH (Seiko)
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1312xxxH Series
Rev.1.1_01
Product Name Structure
Users can select the product type, output voltage, and package type for the S-1312xxxH Series. Refer to "1. Product
name" regarding the contents of product name, "2. Function list of product types" regarding the product type,
"3. Packages" regarding the package drawings, "4. Product name lists" regarding details of the product name.
1. Product name
S-1312 x xx H - xxxx U 3
Environmental code
U: Lead-free (Sn 100%), halogen-free
Package abbreviation and IC packing specifications*1
M5T1: SOT-23-5, Tape
A4T2: HSNT-4 (1010), Tape
Operation temperature
H: Ta = 40°C to +105°C
Output voltage*2
10 to 35
(e.g., when the output voltage is 1.0 V, it is expressed as 10.)
Product type*3
A to D
*1. Refer to the tape drawing.
*2. If you request the product which has 0.05 V step, contact our sales office.
*3. Refer to "2. Function list of product types".
2. Function list of product types
Product Type
A
B
C
D
ON / OFF Logic
Active "H"
Active "H"
Active "H"
Active "H"
Table 1
Discharge Shunt Function
Available
Available
Unavailable
Unavailable
Pull-down Resistor
Available
Unavailable
Available
Unavailable
3. Packages
Package Name
SOT-23-5
HSNT-4 (1010)
Table 2
Dimension
MP005-A-P-SD
PL004-A-P-SD
Package Drawing Codes
Tape
Reel
MP005-A-C-SD
MP005-A-R-SD
PL004-A-C-SD
PL004-A-R-SD
Land
PL004-A-L-SD
4


S-1312xxxH (Seiko)
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_01
S-1312xxxH Series
4. Product name lists
4. 1 S-1312xxxH Series A type
ON / OFF logic:
Discharge shunt function:
Active "H"
Available
Pull-down resistor: Available
Table 3
Output Voltage
SOT-23-5
HSNT-4 (1010)
1.0 V ± 15 mV
1.1 V ± 15 mV
1.2 V ± 15 mV
1.25 V ± 15 mV
1.3 V ± 15 mV
1.4 V ± 15 mV
1.5 V ± 1.0%
1.6 V ± 1.0%
1.7 V ± 1.0%
1.8 V ± 1.0%
1.85 V ± 1.0%
1.9 V ± 1.0%
2.0 V ± 1.0%
2.1 V ± 1.0%
2.2 V ± 1.0%
2.3 V ± 1.0%
2.4 V ± 1.0%
2.5 V ± 1.0%
2.6 V ± 1.0%
2.7 V ± 1.0%
2.8 V ± 1.0%
2.85 V ± 1.0%
2.9 V ± 1.0%
3.0 V ± 1.0%
3.1 V ± 1.0%
3.2 V ± 1.0%
3.3 V ± 1.0%
3.4 V ± 1.0%
3.5 V ± 1.0%
S-1312A10H-M5T1U3
S-1312A11H-M5T1U3
S-1312A12H-M5T1U3
S-1312A1CH-M5T1U3
S-1312A13H-M5T1U3
S-1312A14H-M5T1U3
S-1312A15H-M5T1U3
S-1312A16H-M5T1U3
S-1312A17H-M5T1U3
S-1312A18H-M5T1U3
S-1312A1JH-M5T1U3
S-1312A19H-M5T1U3
S-1312A20H-M5T1U3
S-1312A21H-M5T1U3
S-1312A22H-M5T1U3
S-1312A23H-M5T1U3
S-1312A24H-M5T1U3
S-1312A25H-M5T1U3
S-1312A26H-M5T1U3
S-1312A27H-M5T1U3
S-1312A28H-M5T1U3
S-1312A2JH-M5T1U3
S-1312A29H-M5T1U3
S-1312A30H-M5T1U3
S-1312A31H-M5T1U3
S-1312A32H-M5T1U3
S-1312A33H-M5T1U3
S-1312A34H-M5T1U3
S-1312A35H-M5T1U3
S-1312A10H-A4T2U3
S-1312A11H-A4T2U3
S-1312A12H-A4T2U3
S-1312A1CH-A4T2U3
S-1312A13H-A4T2U3
S-1312A14H-A4T2U3
S-1312A15H-A4T2U3
S-1312A16H-A4T2U3
S-1312A17H-A4T2U3
S-1312A18H-A4T2U3
S-1312A1JH-A4T2U3
S-1312A19H-A4T2U3
S-1312A20H-A4T2U3
S-1312A21H-A4T2U3
S-1312A22H-A4T2U3
S-1312A23H-A4T2U3
S-1312A24H-A4T2U3
S-1312A25H-A4T2U3
S-1312A26H-A4T2U3
S-1312A27H-A4T2U3
S-1312A28H-A4T2U3
S-1312A2JH-A4T2U3
S-1312A29H-A4T2U3
S-1312A30H-A4T2U3
S-1312A31H-A4T2U3
S-1312A32H-A4T2U3
S-1312A33H-A4T2U3
S-1312A34H-A4T2U3
S-1312A35H-A4T2U3
Remark Please contact our sales office for products with specifications other than the above.
5


S-1312xxxH (Seiko)
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1312xxxH Series
Rev.1.1_01
4. 2 S-1312xxxH Series B type
ON / OFF logic:
Discharge shunt function:
Active "H"
Available
Pull-down resistor: Unavailable
Table 4
Output Voltage
SOT-23-5
HSNT-4 (1010)
1.0 V ± 15 mV
1.1 V ± 15 mV
1.2 V ± 15 mV
1.3 V ± 15 mV
1.4 V ± 15 mV
1.5 V ± 1.0%
1.6 V ± 1.0%
1.7 V ± 1.0%
1.8 V ± 1.0%
1.85 V ± 1.0%
1.9 V ± 1.0%
2.0 V ± 1.0%
2.1 V ± 1.0%
2.2 V ± 1.0%
2.3 V ± 1.0%
2.4 V ± 1.0%
2.5 V ± 1.0%
2.6 V ± 1.0%
2.7 V ± 1.0%
2.8 V ± 1.0%
2.85 V ± 1.0%
2.9 V ± 1.0%
3.0 V ± 1.0%
3.1 V ± 1.0%
3.2 V ± 1.0%
3.3 V ± 1.0%
3.4 V ± 1.0%
3.5 V ± 1.0%
S-1312B10H-M5T1U3
S-1312B11H-M5T1U3
S-1312B12H-M5T1U3
S-1312B13H-M5T1U3
S-1312B14H-M5T1U3
S-1312B15H-M5T1U3
S-1312B16H-M5T1U3
S-1312B17H-M5T1U3
S-1312B18H-M5T1U3
S-1312B1JH-M5T1U3
S-1312B19H-M5T1U3
S-1312B20H-M5T1U3
S-1312B21H-M5T1U3
S-1312B22H-M5T1U3
S-1312B23H-M5T1U3
S-1312B24H-M5T1U3
S-1312B25H-M5T1U3
S-1312B26H-M5T1U3
S-1312B27H-M5T1U3
S-1312B28H-M5T1U3
S-1312B2JH-M5T1U3
S-1312B29H-M5T1U3
S-1312B30H-M5T1U3
S-1312B31H-M5T1U3
S-1312B32H-M5T1U3
S-1312B33H-M5T1U3
S-1312B34H-M5T1U3
S-1312B35H-M5T1U3
S-1312B10H-A4T2U3
S-1312B11H-A4T2U3
S-1312B12H-A4T2U3
S-1312B13H-A4T2U3
S-1312B14H-A4T2U3
S-1312B15H-A4T2U3
S-1312B16H-A4T2U3
S-1312B17H-A4T2U3
S-1312B18H-A4T2U3
S-1312B1JH-A4T2U3
S-1312B19H-A4T2U3
S-1312B20H-A4T2U3
S-1312B21H-A4T2U3
S-1312B22H-A4T2U3
S-1312B23H-A4T2U3
S-1312B24H-A4T2U3
S-1312B25H-A4T2U3
S-1312B26H-A4T2U3
S-1312B27H-A4T2U3
S-1312B28H-A4T2U3
S-1312B2JH-A4T2U3
S-1312B29H-A4T2U3
S-1312B30H-A4T2U3
S-1312B31H-A4T2U3
S-1312B32H-A4T2U3
S-1312B33H-A4T2U3
S-1312B34H-A4T2U3
S-1312B35H-A4T2U3
Remark Please contact our sales office for products with specifications other than the above.
6


S-1312xxxH (Seiko)
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_01
S-1312xxxH Series
4. 3 S-1312xxxH Series C type
ON / OFF logic:
Discharge shunt function:
Active "H"
Unavailable
Pull-down resistor: Available
Table 5
Output Voltage
SOT-23-5
HSNT-4 (1010)
1.0 V ± 15 mV
1.1 V ± 15 mV
1.2 V ± 15 mV
1.3 V ± 15 mV
1.4 V ± 15 mV
1.5 V ± 1.0%
1.6 V ± 1.0%
1.7 V ± 1.0%
1.8 V ± 1.0%
1.85 V ± 1.0%
1.9 V ± 1.0%
2.0 V ± 1.0%
2.1 V ± 1.0%
2.2 V ± 1.0%
2.3 V ± 1.0%
2.4 V ± 1.0%
2.5 V ± 1.0%
2.6 V ± 1.0%
2.7 V ± 1.0%
2.8 V ± 1.0%
2.85 V ± 1.0%
2.9 V ± 1.0%
3.0 V ± 1.0%
3.1 V ± 1.0%
3.2 V ± 1.0%
3.3 V ± 1.0%
3.4 V ± 1.0%
3.5 V ± 1.0%
S-1312C10H-M5T1U3
S-1312C11H-M5T1U3
S-1312C12H-M5T1U3
S-1312C13H-M5T1U3
S-1312C14H-M5T1U3
S-1312C15H-M5T1U3
S-1312C16H-M5T1U3
S-1312C17H-M5T1U3
S-1312C18H-M5T1U3
S-1312C1JH-M5T1U3
S-1312C19H-M5T1U3
S-1312C20H-M5T1U3
S-1312C21H-M5T1U3
S-1312C22H-M5T1U3
S-1312C23H-M5T1U3
S-1312C24H-M5T1U3
S-1312C25H-M5T1U3
S-1312C26H-M5T1U3
S-1312C27H-M5T1U3
S-1312C28H-M5T1U3
S-1312C2JH-M5T1U3
S-1312C29H-M5T1U3
S-1312C30H-M5T1U3
S-1312C31H-M5T1U3
S-1312C32H-M5T1U3
S-1312C33H-M5T1U3
S-1312C34H-M5T1U3
S-1312C35H-M5T1U3
S-1312C10H-A4T2U3
S-1312C11H-A4T2U3
S-1312C12H-A4T2U3
S-1312C13H-A4T2U3
S-1312C14H-A4T2U3
S-1312C15H-A4T2U3
S-1312C16H-A4T2U3
S-1312C17H-A4T2U3
S-1312C18H-A4T2U3
S-1312C1JH-A4T2U3
S-1312C19H-A4T2U3
S-1312C20H-A4T2U3
S-1312C21H-A4T2U3
S-1312C22H-A4T2U3
S-1312C23H-A4T2U3
S-1312C24H-A4T2U3
S-1312C25H-A4T2U3
S-1312C26H-A4T2U3
S-1312C27H-A4T2U3
S-1312C28H-A4T2U3
S-1312C2JH-A4T2U3
S-1312C29H-A4T2U3
S-1312C30H-A4T2U3
S-1312C31H-A4T2U3
S-1312C32H-A4T2U3
S-1312C33H-A4T2U3
S-1312C34H-A4T2U3
S-1312C35H-A4T2U3
Remark Please contact our sales office for products with specifications other than the above.
7


S-1312xxxH (Seiko)
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1312xxxH Series
Rev.1.1_01
4. 4 S-1312xxxH Series D type
ON / OFF logic:
Discharge shunt function:
Active "H"
Unavailable
Pull-down resistor: Unavailable
Table 6
Output Voltage
SOT-23-5
HSNT-4 (1010)
1.0 V ± 15 mV
1.1 V ± 15 mV
1.2 V ± 15 mV
1.3 V ± 15 mV
1.4 V ± 15 mV
1.5 V ± 1.0%
1.6 V ± 1.0%
1.7 V ± 1.0%
1.8 V ± 1.0%
1.85 V ± 1.0%
1.9 V ± 1.0%
2.0 V ± 1.0%
2.1 V ± 1.0%
2.2 V ± 1.0%
2.3 V ± 1.0%
2.4 V ± 1.0%
2.5 V ± 1.0%
2.6 V ± 1.0%
2.7 V ± 1.0%
2.8 V ± 1.0%
2.85 V ± 1.0%
2.9 V ± 1.0%
3.0 V ± 1.0%
3.1 V ± 1.0%
3.2 V ± 1.0%
3.3 V ± 1.0%
3.4 V ± 1.0%
3.5 V ± 1.0%
S-1312D10H-M5T1U3
S-1312D11H-M5T1U3
S-1312D12H-M5T1U3
S-1312D13H-M5T1U3
S-1312D14H-M5T1U3
S-1312D15H-M5T1U3
S-1312D16H-M5T1U3
S-1312D17H-M5T1U3
S-1312D18H-M5T1U3
S-1312D1JH-M5T1U3
S-1312D19H-M5T1U3
S-1312D20H-M5T1U3
S-1312D21H-M5T1U3
S-1312D22H-M5T1U3
S-1312D23H-M5T1U3
S-1312D24H-M5T1U3
S-1312D25H-M5T1U3
S-1312D26H-M5T1U3
S-1312D27H-M5T1U3
S-1312D28H-M5T1U3
S-1312D2JH-M5T1U3
S-1312D29H-M5T1U3
S-1312D30H-M5T1U3
S-1312D31H-M5T1U3
S-1312D32H-M5T1U3
S-1312D33H-M5T1U3
S-1312D34H-M5T1U3
S-1312D35H-M5T1U3
S-1312D10H-A4T2U3
S-1312D11H-A4T2U3
S-1312D12H-A4T2U3
S-1312D13H-A4T2U3
S-1312D14H-A4T2U3
S-1312D15H-A4T2U3
S-1312D16H-A4T2U3
S-1312D17H-A4T2U3
S-1312D18H-A4T2U3
S-1312D1JH-A4T2U3
S-1312D19H-A4T2U3
S-1312D20H-A4T2U3
S-1312D21H-A4T2U3
S-1312D22H-A4T2U3
S-1312D23H-A4T2U3
S-1312D24H-A4T2U3
S-1312D25H-A4T2U3
S-1312D26H-A4T2U3
S-1312D27H-A4T2U3
S-1312D28H-A4T2U3
S-1312D2JH-A4T2U3
S-1312D29H-A4T2U3
S-1312D30H-A4T2U3
S-1312D31H-A4T2U3
S-1312D32H-A4T2U3
S-1312D33H-A4T2U3
S-1312D34H-A4T2U3
S-1312D35H-A4T2U3
Remark Please contact our sales office for products with specifications other than the above.
8


S-1312xxxH (Seiko)
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_01
S-1312xxxH Series
Pin Configurations
1. SOT-23-5
Top view
54
123
Figure 5
Table 7
Pin No.
Symbol
Description
1 VIN
Input voltage pin
2 VSS
GND pin
3 ON / OFF ON / OFF pin
4 NC*1
No connection
5
VOUT
Output voltage pin
*1. The NC pin is electrically open.
The NC pin can be connected to the VIN pin or the VSS pin.
2. HSNT-4 (1010)
Top view
14
23
Bottom view
41
32
*1
Pin No.
1
2
3
4
Table 8
Symbol
Description
VOUT
Output voltage pin
VSS
GND pin
ON / OFF ON / OFF pin
VIN Input voltage pin
*1. Connect the heat sink of backside at
shadowed area to the board, and set
electric potential open or GND.
However, do not use it as the function
of electrode.
Figure 6
9


S-1312xxxH (Seiko)
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1312xxxH Series
Rev.1.1_01
Absolute Maximum Ratings
Table 9
(Ta = +25°C unless otherwise specified)
Item
Symbol
Absolute Maximum Rating
Unit
Input voltage
VIN
VON / OFF
VSS 0.3 to VSS + 6.0
VSS 0.3 to VSS + 6.0
V
V
Output voltage
VOUT
VSS 0.3 to VIN + 0.3
V
Output current
Operation ambient temperature
IOUT
Topr
180
40 to +105
mA
°C
Storage temperature
Tstg
40 to +125
°C
Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical
damage. These values must therefore not be exceeded under any conditions.
Thermal Resistance Value
Table 10
Item
Symbol
Condition
Junction-to-ambient thermal resistance*1 θja
SOT-23-5
HSNT-4 (1010)
Board 1
Board 2
Board 1
Board 2
*1. Test environment: compliance with JEDEC STANDARD JESD51-2A
Min.
Typ.
192
160
378
317
Remark Refer to "Thermal Characteristics" for details of power dissipation and test board.
Max.
Unit
°C/W
°C/W
°C/W
°C/W
10


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HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_01
S-1312xxxH Series
Electrical Characteristics
Table 11
Item Symbol
Condition
Output voltage*1
Output current*2
VOUT(E)
IOUT
Dropout voltage*3
Vdrop
Line regulation
ΔVOUT1
ΔVIN VOUT
Load regulation
Output voltage
temperature coefficient*4
Current consumption
during operation
Current consumption
during power-off
Input voltage
ΔVOUT2
ΔVOUT
ΔTa VOUT
ISS1
ISS2
VIN
ON / OFF pin input voltage "H" VSH
ON / OFF pin input voltage "L" VSL
ON / OFF pin input current "H" ISH
ON / OFF pin input current "L" ISL
VIN = VOUT(S) + 1.0 V,
IOUT = 30 mA
1.0 V VOUT(S) < 1.5 V
1.5 V VOUT(S) 3.5 V
VIN VOUT(S) + 1.0 V
1.0 V VOUT(S) < 1.1 V
1.1 V VOUT(S) < 1.2 V
1.2 V VOUT(S) < 1.3 V
1.3 V VOUT(S) < 1.4 V
1.4 V VOUT(S) < 1.5 V
IOUT = 100 mA
1.5 V VOUT(S) < 1.7 V
1.7 V VOUT(S) < 2.0 V
2.0 V VOUT(S) < 2.5 V
2.5 V VOUT(S) < 3.0 V
3.0 V VOUT(S) < 3.3 V
3.3 V VOUT(S) 3.5 V
1.0 V VOUT(S) < 1.1 V
1.6 V VIN 5.5V, IOUT = 30 mA
1.1 V VOUT(S) 3.5 V
VOUT(S) + 0.5 V VIN 5.5 V, IOUT = 30 mA
VIN = VOUT(S) + 1.0 V, 100 μA IOUT 100 mA
VIN = VOUT(S) + 1.0 V, IOUT = 30 mA,
40°C Ta ≤ + 105°C
VIN = VOUT(S) + 1.0 V, ON / OFF pin = ON, no load
VIN = VOUT(S) + 1.0 V, ON / OFF pin = OFF, no load
VIN = VOUT(S) + 1.0 V, RL = 1.0 kΩ
determined by VOUT output level
VIN = VOUT(S) + 1.0 V, RL = 1.0 kΩ
determined by VOUT output level
B / D type
VIN = 5.5 V,
(without pull-down registor)
VON / OFF = 5.5 V
A / C type
(with pull-down registor)
VIN = 5.5 V, VON / OFF = 0 V
(Ta = +25°C unless otherwise specified)
Min.
Typ.
Max.
Unit
Test
Circuit
VOUT(S)
0.015
VOUT(S)
× 0.99
150*5
VOUT(S)
VOUT(S)
VOUT(S)
+ 0.015
VOUT(S)
× 1.01
V
V
mA
1
1
3
0.50 0.68 0.86 V 1
0.52 0.71 V 1
0.31 0.63 V 1
0.28 0.56 V 1
0.26 0.50 V 1
0.24 0.47 V 1
0.22 0.43 V 1
0.18 0.36 V 1
0.16 0.32 V 1
0.15 0.28 V 1
0.14 0.27 V 1
0.02 0.1 %/V 1
0.02 0.1 %/V 1
20 40 mV 1
− ±130 ppm/°C 1
20 30 μA 2
0.1 1.0 μA 2
1.5 5.5 V
1.0
V4
− − 0.25 V 4
0.1
0.1 μA 4
1.0 2.5 5.0 μA 4
0.1
0.1 μA 4
Ripple rejection
RR
Short-circuit current
Thermal shutdown detection
temperature
Thermal shutdown
release temperature
"L" output Nch ON resistance
Ishort
TSD
TSR
RLOW
Power-off pull-down resistance RPD
VIN = VOUT(S) + 1.0 V,
f = 1.0 kHz,
ΔVrip = 0.5 Vrms,
IOUT = 30 mA
1.0 V VOUT(S) 1.2 V
1.2 V < VOUT(S) 2.85 V
2.85 V < VOUT(S) 3.5 V
75 dB 5
70 dB 5
65 dB 5
VIN = VOUT(S) + 1.0 V, ON / OFF pin = ON, VOUT = 0 V
50
mA 3
Junction temperature
150 − °C
Junction temperature
120 − °C
VOUT = 0.1 V,
VIN = 5.5 V
A / B type
(with discharge shuntfunction)
35
Ω3
A / C type
(with pull-down registor)
1.0 2.2 5.0 MΩ 4
11


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HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1312xxxH Series
Rev.1.1_01
*1. VOUT(S): Set output voltage
VOUT(E): Actual output voltage
Output voltage when fixing IOUT (= 30 mA) and inputting VOUT(S) + 1.0 V
*2. The output current at which the output voltage becomes 95% of VOUT(E) after gradually increasing the output current.
*3. Vdrop = VIN1 (VOUT3 × 0.98)
VOUT3 is the output voltage when VIN = VOUT(S) + 1.0 V and IOUT = 100 mA.
VIN1 is the input voltage at which the output voltage becomes 98% of VOUT3 after gradually decreasing the input
voltage.
*4. A change in the temperature of the output voltage [mV/°C] is calculated using the following equation.
ΔVOUT
ΔTa
[mV/°C]*1 = VOUT(S) [V]*2 ×
ΔVOUT
ΔTa VOUT
[ppm/°C]*3 ÷ 1000
*1. Change in temperature of output voltage
*2. Set output voltage
*3. Output voltage temperature coefficient
*5. The output current can be at least this value.
Due to limitation of the power dissipation, this value may not be satisfied. Attention should be paid to the power
dissipation when the output current is large.
This specification is guaranteed by design.
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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_01
S-1312xxxH Series
Test Circuits
VIN VOUT
ON / OFF
Set to ON
VSS
+
A
+
V
Figure 7 Test Circuit 1
+
A VIN
VOUT
ON / OFF
VSS
Set to VIN or GND
Figure 8 Test Circuit 2
VIN VOUT
ON / OFF
Set to ON
VSS
+
A
+
V
Figure 9 Test Circuit 3
VIN VOUT
+
A
ON / OFF
VSS
Set to VIN or GND
Figure 10 Test Circuit 4
VIN VOUT
ON / OFF
Set to ON
VSS
+
V RL
+
V RL
Figure 11 Test Circuit 5
13


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HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1312xxxH Series
Rev.1.1_01
Standard Circuit
Input
CIN*1
VIN VOUT
ON / OFF
VSS
Output
CL*2
Single GND
GND
*1. CIN is a capacitor for stabilizing the input.
*2. A ceramic capacitor of 0.22 μF or more can be used as CL.
Caution
Figure 12
The above connection diagram and constant will not guarantee successful operation. Perform
thorough evaluation using the actual application to set the constant.
Condition of Application
Input capacitor (CIN):
Output capacitor (CL):
0.22 μF or more
0.22 μF or more
Caution Generally a series regulator may cause oscillation, depending on the selection of external parts.
Confirm that no oscillation occurs in the application for which the above capacitors are used.
Selection of Input and Output Capacitors (CIN, CL)
The S-1312xxxH Series requires an output capacitor between the VOUT pin and the VSS pin for phase compensation.
Operation is stabilized by a ceramic capacitor with an output capacitance of 0.22 μF or more over the entire temperature
range. When using an OS capacitor, a tantalum capacitor, or an aluminum electrolytic capacitor, the capacitance must
be 0.22 μF or more.
The value of the output overshoot or undershoot transient response varies depending on the value of the output
capacitor. The required capacitance of the input capacitor differs depending on the application.
The recommended capacitance for an application is CIN 0.22 μF, CL 0.22 μF; however, when selecting the output
capacitor, perform sufficient evaluation, including evaluation of temperature characteristics, on the actual device.
14


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HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_01
S-1312xxxH Series
Explanation of Terms
1. Low dropout voltage regulator
This voltage regulator has the low dropout voltage due to its built-in low on-resistance transistor.
2. Output voltage (VOUT)
The accuracy of the output voltage is ensured at ±1.0% or ±15 mV*1 under the specified conditions of fixed input
voltage*2, fixed output current, and fixed temperature.
*1. When VOUT < 1.5 V: ±15 mV, when VOUT 1.5 V: ±1.0%
*2. Differs depending on the product.
Caution
If the above conditions change, the output voltage value may vary and exceed the accuracy range
of the output voltage. Refer to "Electrical Characteristics" and "Characteristics (Typical Data)"
for details.
3.
Line regulation
ΔVOUT1
ΔVIN VOUT
Indicates the dependency of the output voltage on the input voltage. That is, the values show how much the output
voltage changes due to a change in the input voltage with the output current remaining unchanged.
4. Load regulation (ΔVOUT2)
Indicates the dependency of the output voltage on the output current. That is, the values show how much the output
voltage changes due to a change in the output current with the input voltage remaining unchanged.
5. Dropout voltage (Vdrop)
Indicates the difference between input voltage (VIN1) and the output voltage when; decreasing input voltage (VIN)
gradually until the output voltage has dropped out to the value of 98% of output voltage (VOUT3), which is at VIN
= VOUT(S) + 1.0 V.
Vdrop = VIN1 (VOUT3 × 0.98)
15


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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1312xxxH Series
Rev.1.1_01
6.
Output
voltage temperature
coefficient
ΔVOUT
ΔTa VOUT
The shaded area in Figure 13 is the range where VOUT varies in the operation temperature range when the output
voltage temperature coefficient is ±130 ppm/°C.
VOUT
[V]
Example of S-1312A10H typ. product
+0.13 mV/°C
VOUT(E)*1
0.13 mV/°C
40
+25
+105
Ta [°C]
*1. VOUT(E) is the value of the output voltage measured at Ta = +25°C.
Figure 13
A change in the temperature of the output voltage [mV/°C] is calculated using the following equation.
ΔVOUT
ΔTa
[mV/°C]*1 = VOUT(S) [V]*2 ×
ΔVOUT
ΔTaVOUT
[ppm/°C]*3 ÷ 1000
*1. Change in temperature of output voltage
*2. Set output voltage
*3. Output voltage temperature coefficient
16


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HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_01
S-1312xxxH Series
Operation
1. Basic operation
Figure 14 shows the block diagram of the S-1312xxxH Series.
The error amplifier compares the reference voltage (Vref) with feedback voltage (Vfb), which is the output voltage
resistance-divided by feedback resistors (Rs and Rf). It supplies the gate voltage necessary to maintain the constant
output voltage which is not influenced by the input voltage and temperature change, to the output transistor.
VIN
Current
supply
Vref
Error
amplifier
+
*1
Rf
VOUT
Reference voltage
circuit
Vfb
Rs
VSS
*1. Parasitic diode
Figure 14
2. Output transistor
In the S-1312xxxH Series, a low on-resistance P-channel MOS FET is used as the output transistor.
Be sure that VOUT does not exceed VIN + 0.3 V to prevent the voltage regulator from being damaged due to inverse
current flowing from the VOUT pin through a parasitic diode to the VIN pin, when the potential of VOUT became higher
than VIN.
17


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HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1312xxxH Series
Rev.1.1_01
3. ON / OFF pin
This pin starts and stops the regulator.
When the ON / OFF pin is set to OFF level, the entire internal circuit stops operating, and the built-in
P-channel MOS FET output transistor between the VIN pin and the VOUT pin is turned off, reducing current
consumption significantly.
Note that the current consumption increases when a voltage of 0.25 V to VIN 0.3 V is applied to the ON / OFF pin.
The ON / OFF pin is configured as shown in Figure 15 and Figure 16.
3. 1 S-1312xxxH Series A / C type
The ON / OFF pin is internally pulled down to the VSS pin in the floating status, so the VOUT pin is set to the VSS
level.
For the ON / OFF pin current, refer to the A / C type of the ON / OFF pin input current "H" in "Electrical
Characteristics".
3. 2 S-1312xxxH Series B / D type
The ON / OFF pin is internally not pulled up or pulled down, so do not use this pin in the floating status. When not
using the ON / OFF pin, connect the pin to the VIN pin.
Table 12
Product Type ON / OFF Pin
Internal Circuit
VOUT Pin Voltage
Current Consumption
A/B/C/D
A/B/C/D
"H": ON
"L": OFF
Operate
Stop
Set value
VSS level
ISS1*1
ISS2
*1. Note that the IC's current consumption increases as much as current flows into the pull-down resistor when
the ON / OFF pin is connected to the VIN pin and the S-1312xxxH Series A / C type is operating (refer to
Figure 15).
VIN VIN
ON / OFF
ON / OFF
VSS
VSS
Figure 15 S-1312xxxH Series A / C Type
Figure 16 S-1312xxxH Series B / D Type
18


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HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_01
S-1312xxxH Series
4. Discharge shunt function (S-1312xxxH Series A / B type)
The S-1312xxxH Series A / B type has a built-in discharge shunt circuit to discharge the output capacitance. The output
capacitance is discharged as follows so that the VOUT pin reaches the VSS level.
(1) The ON / OFF pin is set to OFF level.
(2) The output transistor is turned off.
(3) The discharge shunt circuit is turned on.
(4) The output capacitor discharges.
Since the S-1312xxxH Series C / D type does not have a discharge shunt circuit, the VOUT pin is set to the VSS level
through several hundred kΩ internal divided resistors between the VOUT pin and the VSS pin. The S-1312xxxH Series
A / B type allows the VOUT pin to reach the VSS level rapidly due to the discharge shunt circuit.
Output transistor : OFF
*1
VIN
S-1312xxxH Series
VOUT
ON / OFF
ON / OFF circuit
ON / OFF pin
: OFF
Discharge shunt circuit
: ON
*1
Current flow
Output
capacitor
(CL)
VSS
GND
*1. Parasitic diode
Figure 17
5. Pull-down resistor (S-1312xxxH Series A / C type)
The ON / OFF pin is internally pulled down to the VSS pin in the floating status, so the VOUT pin is set to the VSS level.
Note that the IC's current consumption increases as much as current flows into the pull-down resistor of 2.2 MΩ typ.
when the ON / OFF pin is connected to the VIN pin and the S-1312xxxH Series A / C type is operating.
19


S-1312xxxH (Seiko)
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1312xxxH Series
Rev.1.1_01
6. Overcurrent protection circuit
The S-1312xxxH Series includes an overcurrent protection circuit having the characteristics shown in "1. Output
voltage vs. Output current (When load current increases) (Ta = +25°C)" in "Characteristics (Typical Data)", in
order to protect the output transistor against an excessive output current and short circuiting between the VOUT pin
and the VSS pin. The current when the output pin is short-circuited (Ishort) is internally set at approx. 50 mA typ., and
the normal value is restored for the output voltage, if releasing a short circuit once.
Caution This overcurrent protection circuit does not work as for thermal protection. If this IC long keeps
short circuiting inside, pay attention to the conditions of input voltage and load current so that,
under the usage conditions including short circuit, the loss of the IC will not exceed power
dissipation.
7. Thermal shutdown circuit
The S-1312xxxH Series has a thermal shutdown circuit to protect the device from damage due to overheat. When the
junction temperature rises to 150°C typ., the thermal shutdown circuit operates to stop regulating. When the junction
temperature drops to 120°C typ., the thermal shutdown circuit is released to restart regulating.
Due to self-heating of the S-1312xxxH Series, if the thermal shutdown circuit starts operating, it stops regulating so
that the output voltage drops. When regulation stops, the S-1312xxxH Series does not itself generate heat and the
IC's temperature drops. When the temperature drops, the thermal shutdown circuit is released to restart regulating,
thus the S-1312xxxH Series generates heat again. Repeating this procedure makes the waveform of the output
voltage into a pulse-like form. Stop or restart of regulation continues unless decreasing either or both of the input
voltage and the output current in order to reduce the internal power consumption, or decreasing the ambient
temperature.
Table 13
Thermal Shutdown Circuit
VOUT Pin Voltage
Operate: 150°C typ.*1
Release: 120°C typ.*1
VSS level
Set value
*1. Junction temperature
20


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Rev.1.1_01
S-1312xxxH Series
Precautions
Wiring patterns for the VIN pin, the VOUT pin and GND should be designed so that the impedance is low. When
mounting an output capacitor between the VOUT pin and the VSS pin (CL) and a capacitor for stabilizing the input
between the VIN pin and the VSS pin (CIN), the distance from the capacitors to these pins should be as short as
possible.
Note that generally the output voltage may increase when a series regulator is used at low load current (1.0 mA or
less).
Note that generally the output voltage may increase due to the leakage current from an output driver when a series
regulator is used at high temperature.
Note that the output voltage may increase due to the leakage current from an output driver even if the ON / OFF pin is
at OFF level when a series regulator is used at high temperature.
Generally a series regulator may cause oscillation, depending on the selection of external parts. The following
conditions are recommended for the S-1312xxxH Series. However, be sure to perform sufficient evaluation under the
actual usage conditions for selection, including evaluation of temperature characteristics. Refer to "5. Example of
equivalent series resistance vs. Output current characteristics (Ta = +25°C)" in "Reference Data" for the
equivalent series resistance (RESR) of the output capacitor.
Input capacitor (CIN):
Output capacitor (CL):
0.22 μF or more
0.22 μF or more
The voltage regulator may oscillate when the impedance of the power supply is high and the input capacitance is small
or an input capacitor is not connected.
If the output capacitance is small, power supply's fluctuation and the characteristics of load fluctuation become worse.
Sufficiently evaluate the output voltage's fluctuation with the actual device.
Overshoot may occur in the output voltage momentarily if the voltage is rapidly raised at power-on or when the power
supply fluctuates. Sufficiently evaluate the output voltage at power-on with the actual device.
The application conditions for the input voltage, the output voltage, and the load current should not exceed the power
dissipation.
Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic
protection circuit.
In determining the output current, attention should be paid to the output current value specified in Table 11 in
"Electrical Characteristics" and footnote *5 of the table.
SII Semiconductor Corporation claims no responsibility for any disputes arising out of or in connection with any
infringement by products including this IC of patents owned by a third party.
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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1312xxxH Series
Rev.1.1_01
Characteristics (Typical Data)
1. Output voltage vs. Output current (When load current increases) (Ta = +25°C)
1. 1 VOUT = 1.0 V
1.2
1.0
0.8
0.6
0.4
0.2
0
0
100
VIN = 1.3 V
VIN = 1.5 V
VIN = 2.0 V
VIN = 3.0 V
VIN = 5.5 V
200 300 400 500
IOUT [mA]
1. 2 VOUT = 2.5 V
3.0
2.5
2.0 VIN = 2.8 V
1.5
VIN = 3.0 V
VIN = 3.5 V
1.0
VIN = 4.5 V
VIN = 5.5 V
0.5
0
0
100 200 300 400 500
IOUT [mA]
1. 3 VOUT = 3.5 V
4.0
3.5
3.0
2.5
VIN = 3.8 V
VIN = 4.0 V
2.0 VIN = 4.5 V
1.5 VIN = 5.5 V
1.0
0.5
0
0
100 200 300 400 500
IOUT [mA]
Remark
In determining the output current, attention should
be paid to the following.
1. The minimum output current value and
footnote *5 in Table 11 in "Electrical
Characteristics"
2. Power dissipation
2. Output voltage vs. Input voltage (Ta = +25°C)
2. 1 VOUT = 1.0 V
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.6
1.0
IOUT = 1 mA
IOUT = 30 mA
IOUT = 50 mA
IOUT = 100 mA
1.4 1.8
VIN [V]
2.2
2.6
2. 3 VOUT = 3.5 V
3.7
3.6
3.5
3.4
3.3
3.2
3.1
3.0
3.0
3.5
IOUT = 1 mA
IOUT = 30 mA
IOUT = 50 mA
IOUT = 100 mA
4.0 4.5
VIN [V]
5.0
5.5
2. 2 VOUT = 2.5 V
2.7
2.6
2.5
2.4 IOUT = 1 mA
2.3 IOUT = 30 mA
2.2 IOUT = 50 mA
2.1 IOUT = 100 mA
2.0
2.0 2.5 3.0 3.5 4.0 4.5
VIN [V]
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Rev.1.1_01
S-1312xxxH Series
3. Dropout voltage vs. Output current
3. 1 VOUT = 1.0 V
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
Ta = +105°C
Ta = +25°C
Ta = 40°C
25 50 75 100 125 150
IOUT [mA]
3. 3 VOUT = 3.5 V
0.30
0.25
Ta = +105°C
0.20 Ta = +25°C
0.15 Ta = 40°C
0.10
0.05
0
0
25 50 75 100 125 150
IOUT [mA]
4. Dropout voltage vs. Set output voltage
0.6
0.5
0.4
0.3
0.2
0.1
0
1.0
IOUT = 150 mA
IOUT = 100 mA
IOUT = 50 mA
IOUT = 30 mA
IOUT =
10 mA
IOUT = 1 mA
1.5 2.0 2.5 3.0 3.5
VOUT(S) [V]
3. 2 VOUT = 2.5 V
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
0
Ta = +105°C
Ta = +25°C
Ta = 40°C
25 50 75 100 125 150
IOUT [mA]
23


S-1312xxxH (Seiko)
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1312xxxH Series
Rev.1.1_01
5. Output voltage vs. Ambient temperature
5. 1 VOUT = 1.0 V
1.10
1.05
1.00
0.95
0.90
40 25
0
25 50 75 105
Ta [°C]
5. 3 VOUT = 3.5 V
3.8
3.7
3.6
3.5
3.4
3.3
3.2
40 25 0 25 50 75 105
Ta [°C]
6. Current consumption vs. Input voltage
6. 1 VOUT = 1.0 V
35
30
25
20
15
10
5
0
0
1
Ta = +105°C
Ta = +25°C
Ta = 40°C
23456
VIN [V]
6. 3 VOUT = 3.5 V
35
30
25
20
15
10
5
0
0
1
Ta = +105°C
23
VIN [V]
Ta = +25°C
Ta = 40°C
456
5. 2 VOUT = 2.5 V
2.7
2.6
2.5
2.4
2.3
40 25 0 25 50 75 105
Ta [°C]
6. 2 VOUT = 2.5 V
35
30
25
20
15
10
5
0
0
1
Ta = +105°C
Ta = +25°C
Ta = 40°C
23456
VIN [V]
24


S-1312xxxH (Seiko)
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_01
S-1312xxxH Series
7. Ripple rejection (Ta = +25°C)
7. 1 VOUT = 1.0 V
100
VIN = 2.0 V, CL = 0.22 μF
80 IOUT = 1 mA
60 IOUT = 30 mA
40
IOUT = 100 mA
IOUT = 150 mA
20
0
10
100 1k 10k 100k
Frequency [Hz]
1M
7. 3 VOUT = 3.5 V
100
80
VIN = 4.5 V, CL = 0.22 μF
IOUT = 1 mA
60
40 IOUT = 30 mA
IOUT = 100 mA
20 IOUT = 150 mA
0
10
100 1k 10k 100k
Frequency [Hz]
1M
7. 2 VOUT = 2.5 V
100
80
VIN = 3.5 V, CL = 0.22 μF
IOUT = 1 mA
60
40
IOUT = 30 mA
IOUT = 100 mA
20 IOUT = 150 mA
0
10
100 1k 10k 100k
Frequency [Hz]
1M
25


S-1312xxxH (Seiko)
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1312xxxH Series
Rev.1.1_01
Reference Data
1. Transient response characteristics when input (Ta = +25°C)
1. 1 VOUT = 1.0 V
1. 2 VOUT = 2.5 V
IOUT = 30 mA, CL = 0.22 μF, VIN = 2.0 V 3.0 V, tr = tf = 5.0 μs
1.12 4.0
1.10 3.5
1.08 3.0
1.06
1.04
VIN
2.5
2.0
1.02
1.00
VOUT
1.5
1.0
0.98 0.5
0.96 0
40 20 0 20 40 60 80 100 120 140
t [μs]
1. 3 VOUT = 3.5 V
IOUT = 30 mA, CL = 0.22 μF, VIN = 3.5 V 4.5 V, tr = tf = 5.0 μs
2.74 5.0
2.70 4.5
2.66
2.62
VIN
4.0
3.5
2.58 3.0
2.54
2.50
VOUT
2.5
2.0
2.46 1.5
2.42 1.0
40 20 0 20 40 60 80 100 120 140
t [μs]
IOUT = 30 mA, CL = 0.22 μF, VIN = 4.5 V 5.5 V, tr = tf = 5.0 μs
3.74 6.0
3.70 5.5
3.66
3.62
VIN
5.0
4.5
3.58 4.0
3.54
3.50
VOUT
3.5
3.0
3.46 2.5
3.42 2.0
40 20 0 20 40 60 80 100 120 140
t [μs]
2. Transient response characteristics of load (Ta = +25°C)
2. 1 VOUT = 1.0 V
VIN = 2.0 V, CIN = CL = 0.22 μF, IOUT = 50 mA 100 mA
1.20 150
1.15
1.10
IOUT
1.05
1.00
VOUT
0.95
0.90
20 10
0
100
50
0
50
100
150
10 20 30 40 50 60
t [μs]
2. 2 VOUT = 2.5 V
VIN = 3.5 V, CIN = CL = 0.22 μF, IOUT = 50 mA 100 mA
2.70
150
2.65
2.60
IOUT
2.55
2.50
VOUT
2.45
2.40
20 10
0
100
50
0
50
100
150
10 20 30 40 50 60
t [μs]
2. 3 VOUT = 3.5 V
VIN = 4.5 V, CIN = CL = 0.22 μF, IOUT = 50 mA 100 mA
3.70
3.65
3.60
IOUT
150
100
50
3.55
3.50
VOUT
3.45
3.40
20 10
0
0
50
100
150
10 20 30 40 50 60
t [μs]
26


S-1312xxxH (Seiko)
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_01
S-1312xxxH Series
3. Transient response characteristics of ON / OFF pin (Ta = +25°C)
3. 1 VOUT = 1.0 V
3. 2 VOUT = 2.5 V
VIN = 2.0 V, CIN = CL = 0.22 μF, IOUT = 100 mA,
VON / OFF = 0 V 2.0 V, tr = 1.0 μs
2.4 3
2.0
1.6
VON / OFF
2
1
1.2 0
0.8
VOUT
1
0.4 2
0
50
0
3
50 100 150 200
t [μs]
3. 3 VOUT = 3.5 V
VIN = 3.5 V, CIN = CL = 0.22 μF, IOUT = 100 mA,
VON / OFF = 0 V 3.5 V, tr = 1.0 μs
66
5
VON / OFF
4
42
3
VOUT
0
2 2
1 4
0
50
0
6
50 100 150 200
t [μs]
VIN = 4.5 V, CIN = CL = 0.22 μF, IOUT = 100 mA,
VON / OFF = 0 V 4.5 V, tr = 1.0 μs
66
5
VON / OFF
4
42
3
VOUT
0
2 2
1 4
0
50
0
6
50 100 150 200
t [μs]
27


S-1312xxxH (Seiko)
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1312xxxH Series
Rev.1.1_01
4. Output capacitance vs. Characteristics of discharge time (Ta = +25°C)
VIN = VOUT + 1.0 V, IOUT = no load,
VON / OFF = VOUT + 1.0 V VSS, tf = 1.0 μs
2.5
2.0
VOUT(S) = 1.0 V
VOUT(S) = 2.5 V
1.5 VOUT(S) = 3.5 V
1.0
0.5
VON / OFF
VOUT
1.0 μs
tDSC
VSS
0
0 2 4 6 8 10 12
CL [μF]
Figure 18 S-1312xxxH Series A / B Type
(with discharge shunt function)
VOUT × 10%
VIN = VOUT + 1.0 V
VON / OFF = VOUT + 1.0 V VSS
Figure 19 Measurement Condition of Discharge Time
5. Example of equivalent series resistance vs. Output current characteristics (Ta = +25°C)
CIN = CL = 0.22 μF
100
0
0.1
Stable
IOUT [mA]
180
VIN
CIN
ON / OFF
S-1312xxxH
Series
VSS
VOUT
CL*1
RESR
*1. CL: TDK Corporation C2012X7R1H224K (0.22 μF)
Figure 20
Figure 21
28


S-1312xxxH (Seiko)
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_01
S-1312xxxH Series
Thermal Characteristics
1. SOT-23-5
1.0
Tj = 125C max.
0.8
Board 2
0.63 W
0.6
Board 1
0.4 0.52 W
0.2
0
0 50 100 150
Ambient temperature (Ta) [C]
Figure 22 Power Dissipation of Package (When Mounted on Board)
1. 1 Board 1*1
76.2 mm
Figure 23
Table 14
Item Specification
Thermal resistance value
(θja)
192°C/W
Size 114.3 mm × 76.2 mm × t1.6 mm
Material
FR-4
Number of copper foil layer 2
1 Land pattern and wiring for testing: t0.070 mm
Copper foil layer
2
3
4 74.2 mm × 74.2 mm × t0.070 mm
Thermal via
1. 2 Board 2*1
76.2 mm
Table 15
Figure 24
Item Specification
Thermal resistance value
(θja)
160°C/W
Size 114.3 mm × 76.2 mm × t1.6 mm
Material
FR-4
Number of copper foil layer 4
1 Land pattern and wiring for testing: t0.070 mm
Copper foil layer
2 74.2 mm × 74.2 mm × t0.035 mm
3 74.2 mm × 74.2 mm × t0.035 mm
4 74.2 mm × 74.2 mm × t0.070 mm
Thermal via
*1. The board is same in SOT-23-3, SOT-23-5 and SOT-23-6.
29


S-1312xxxH (Seiko)
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

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105°C OPERATION LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1312xxxH Series
Rev.1.1_01
2. HSNT-4 (1010)
1.0 Tj = 125C max.
0.8
0.6
0.4
Board 2
0.32 W
0.2 Board 1
0.26 W
0
0 50 100 150
Ambient temperature (Ta) [C]
Figure 25 Power Dissipation of Package (When Mounted on Board)
2. 1 Board 1
76.2 mm
Figure 26
Item
Thermal resistance value
(θja)
Size
Material
Number of copper foil layer
1
Copper foil layer
2
3
4
Thermal via
Table 16
Specification
378°C/W
114.3 mm × 76.2 mm × t1.6 mm
FR-4
2
Land pattern and wiring for testing: t0.070 mm
74.2 mm × 74.2 mm × t0.070 mm
2. 2 Board 2
76.2 mm
Figure 27
Item
Thermal resistance value
(θja)
Size
Material
Number of copper foil layer
1
Copper foil layer
2
3
4
Thermal via
Table 17
Specification
317°C/W
114.3 mm × 76.2 mm × t1.6 mm
FR-4
4
Land pattern and wiring for testing: t0.070 mm
74.2 mm × 74.2 mm × t0.035 mm
74.2 mm × 74.2 mm × t0.035 mm
74.2 mm × 74.2 mm × t0.070 mm
30




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