S-1142B (Seiko Instruments)
OPERATION CMOS VOLTAGE REGULATOR

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S-1142A/BxxH Series
HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION
www.sii-ic.com
LOW DROPOUT 105°C OPERATION CMOS VOLTAGE REGULATOR
© SII Semiconductor Corporation, 2012-2014
Rev.2.2_01
The S-1142A/BxxH Series, developed by using high-withstand voltage CMOS technology, is a positive voltage regulator
with a high-withstand voltage, low current consumption, and high-accuracy output voltage.
The S-1142A/BxxH Series operates at a high maximum operating voltage of 50 V and a low current consumption of 4.0 μA
typ. In addition to a built-in low on-resistance transistor which provides a very small dropout voltage and a large output
current, this voltage regulator also has a built-in ON / OFF circuit.
An overcurrent protection circuit prevents the load current from exceeding the capacitance of the output transistor, and a
built-in thermal shutdown circuit prevents damage caused by heat.
A high heat radiation HSOP-6 package enables high-density mounting.
Caution Before using the product in automobile control unit or medical equipment, contact to SII
Semiconductor Corporation is indispensable.
Features
Output voltage:
Input voltage:
Output voltage accuracy:
Current consumption:
Output current:
Input and output capacitors:
Built-in overcurrent protection circuit:
Built-in thermal shutdown circuit:
Built-in ON / OFF circuit:
Operation temperature range:
Lead-free (Sn 100%), halogen-free
2.0 V to 15.0 V, selectable in 0.1 V step
3.0 V to 50 V
±1.0% (Tj = +25°C)
±3.0% (Tj = 40°C to +105°C)
During operation: 4.0 μA typ., 9.0 μA max. (Ta = 40°C to +105°C)
During power-off: 0.1 μA typ., 2.5 μA max. (Ta = 40°C to +105°C)
Possible to output 200 mA (VIN VOUT(S) + 2.0 V)*1
A ceramic capacitor of 0.1 μF or more can be used.
Limits overcurrent of output transistor.
Prevents damage caused by heat.
Ensures long battery life.
Ta = 40°C to +105°C
*1. Attention should be paid to the power dissipation of the package when the output current is large.
Applications
Constant-voltage power supply for electrical application for vehicle interior
Constant-voltage power supply for home electric appliance
Package
HSOP-6
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S-1142B (Seiko Instruments)
OPERATION CMOS VOLTAGE REGULATOR

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HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT 105°C OPERATION CMOS VOLTAGE REGULATOR
S-1142A/BxxH Series
Rev.2.2_01
Block Diagram
*1
VIN
Overcurrent
protection circuit
Thermal shutdown circuit
VOUT
ON / OFF
ON / OFF circuit
+
Reference
voltage circuit
VSS
*1. Parasitic diode
Figure 1
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S-1142B (Seiko Instruments)
OPERATION CMOS VOLTAGE REGULATOR

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HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT 105°C OPERATION CMOS VOLTAGE REGULATOR
Rev.2.2_01
S-1142A/BxxH Series
Product Name Structure
Users can select the product type and output voltage for the S-1142A/BxxH Series. Refer to "1. Product name"
regarding the contents of product name, "2. Package" regarding the package drawings and "3. Product name list"
for details of product names.
1. Product name
S-1142 x xx H - E6T2 U
Environmental code
U: Lead-free (Sn 100%), halogen-free
Package abbreviation and IC packing specifications*1
E6T2: HSOP-6, Tape
Operation temperature
H: Ta = 40°C to +105°C
Output voltage
20 to F0
(e.g., when the output voltage is 2.0 V, it is expressed as 20.
when the output voltage is 10 V, it is expressed as A0.
when the output voltage is 11 V, it is expressed as B0.
when the output voltage is 12 V, it is expressed as C0.
when the output voltage is 15 V, it is expressed as F0.)
Product type*2
A: ON / OFF pin negative logic
B: ON / OFF pin positive logic
*1. Refer to the tape drawing.
*2. Refer to "3. ON / OFF pin" in "Operation".
Remark When overshoot of the S-1142A/BxxH Series has some influences, consider to use the S-1142C/DxxH
Series. Refer to "6. Overshoot of output voltage" in "Operation" regarding details of overshoot.
2. Package
Package Name
HSOP-6
Table 1
Dimension
FH006-A-P-SD
Package Drawing Codes
Tape
Reel
FH006-A-C-SD
FH006-A-R-SD
Land
FH006-A-L-SD
3


S-1142B (Seiko Instruments)
OPERATION CMOS VOLTAGE REGULATOR

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HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT 105°C OPERATION CMOS VOLTAGE REGULATOR
S-1142A/BxxH Series
Rev.2.2_01
3. Product name list
3. 1 S-1142 Series A type
Table 2
Output Voltage
HSOP-6
3.3 V ± 1.0%
5.0 V ± 1.0%
S-1142A33H-E6T2U
S-1142A50H-E6T2U
12.0 V ± 1.0%
S-1142AC0H-E6T2U
Remark Please contact our sales office for products with specifications other than the above.
3. 2 S-1142 Series B type
Table 3
Output Voltage
HSOP-6
2.0 V ± 1.0%
S-1142B20H-E6T2U
2.5 V ± 1.0%
S-1142B25H-E6T2U
2.7 V ± 1.0%
S-1142B27H-E6T2U
2.8 V ± 1.0%
S-1142B28H-E6T2U
2.85 V ± 1.0%
S-1142B2JH-E6T2U
3.0 V ± 1.0%
S-1142B30H-E6T2U
3.2 V ± 1.0%
S-1142B32H-E6T2U
3.3 V ± 1.0%
S-1142B33H-E6T2U
3.5 V ± 1.0%
S-1142B35H-E6T2U
3.7 V ± 1.0%
S-1142B37H-E6T2U
4.0 V ± 1.0%
S-1142B40H-E6T2U
5.0 V ± 1.0%
S-1142B50H-E6T2U
8.0 V ± 1.0%
S-1142B80H-E6T2U
12.5 V ± 1.0%
S-1142BC5H-E6T2U
15.0 V ± 1.0%
S-1142BF0H-E6T2U
Remark Please contact our sales office for products with specifications other than the above.
4


S-1142B (Seiko Instruments)
OPERATION CMOS VOLTAGE REGULATOR

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HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT 105°C OPERATION CMOS VOLTAGE REGULATOR
Rev.2.2_01
S-1142A/BxxH Series
Pin Configuration
1. HSOP-6
Top view
654
123
Figure 2
Table 4
Pin No.
Symbol
Description
1
VOUT
Output voltage pin
2 VSS GND pin
3 ON / OFF ON / OFF pin
4 NC*1 No connection
5 VSS GND pin
6 VIN
Input voltage pin
*1. The NC pin is electrically open.
The NC pin can be connected to the VIN pin or the VSS pin.
5


S-1142B (Seiko Instruments)
OPERATION CMOS VOLTAGE REGULATOR

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HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT 105°C OPERATION CMOS VOLTAGE REGULATOR
S-1142A/BxxH Series
Rev.2.2_01
Absolute Maximum Ratings
Table 5
(Ta = +25°C unless otherwise specified)
Item
Symbol
Absolute Maximum Rating
Unit
Input voltage
VIN
VON / OFF
VSS 0.3 to VSS + 60
VSS 0.3 to VIN + 0.3
V
V
Output voltage
VOUT
VSS 0.3 to VIN + 0.3
V
Power dissipation
PD
1900*1
mW
Junction temperature
Tj
40 to +125
°C
Operation ambient temperature Topr
40 to +105
°C
Storage temperature
Tstg
40 to +125
°C
*1. When mounted on board
[Mounted board]
(1) Board size:
50 mm × 50 mm × t1.6 mm
(2) Board material: Glass epoxy resin (two layers)
(3) Wiring ratio: 50%
(4) Test conditions: When mounted on board (wind speed: 0 m/s)
(5) Land pattern: Refer to the recommended land pattern (drawing code: FH006-A-L-SD)
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.
2400
2000
1600
1200
800
400
0
0 50 100 150
Ambient temperature (Ta) [°C]
Figure 3 Power Dissipation of Package (When Mounted on Board)
Condition
HSOP-6 (When mounted on board)
Table 6
Power Dissipation
1900 mW
Thermal Resistance Value (θj a)
53°C/W
6


S-1142B (Seiko Instruments)
OPERATION CMOS VOLTAGE REGULATOR

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HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT 105°C OPERATION CMOS VOLTAGE REGULATOR
Rev.2.2_01
S-1142A/BxxH Series
Power dissipation of HSOP-6 (reference)
Package power dissipation differs depending on the mounting conditions.
The power dissipation characteristics under the following test conditions should be taken as reference values only.
[Mounted board]
(1) Board size:
50 mm × 50 mm × t1.6 mm
(2) Board material: Glass epoxy resin (two layers)
(3) Wiring ratio: 90%
(4) Test conditions: When mounted on board (wind speed: 0 m/s)
(5) Land pattern: Refer to the recommended land pattern (drawing code: FH006-A-L-SD)
2400
2000
1600
1200
800
400
0
0 50 100 150
Ambient temperature (Ta) [°C]
Figure 4 Power Dissipation of Package (When Mounted on Board)
Condition
HSOP-6 (When mounted on board)
Table 7
Power Dissipation (Reference)
2000 mW
Thermal Resistance Value (θj a)
50°C/W
7


S-1142B (Seiko Instruments)
OPERATION CMOS VOLTAGE REGULATOR

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HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT 105°C OPERATION CMOS VOLTAGE REGULATOR
S-1142A/BxxH Series
Rev.2.2_01
Electrical Characteristics
Table 8 (1 / 2)
Item
Output voltage*1
Output current*2
Dropout voltage*3
Line regulation
Load regulation
Current
consumption
during operation
Current
consumption
during power-off
Input voltage
Symbol
VOUT(E)
IOUT
Vdrop
ΔVOUT1
ΔVIN VOUT
ΔVOUT2
ISS1
ISS2
VIN
(Tj = 40°C ~ +125°C, Ta = 40°C ~ +105°C unless otherwise specified)
Condition
Min.
Typ. Max.
Unit
Test
Circuit
VIN = 13.5 V,
IOUT = 30 mA,
40°C Tj ≤ +105°C
2.0 V VOUT(S) < 12.5 V
VOUT(S)
× 0.97
VOUT(S)
VOUT(S)
× 1.03
V
1
VIN = VOUT(S) + 1.0 V,
IOUT = 30 mA,
40°C Tj ≤ +105°C
12.5 V VOUT(S) 15.0 V
VOUT(S)
× 0.97
VOUT(S)
VOUT(S)
× 1.03
V
1
VIN VOUT(S) + 2.0 V
200*4
mA 3
2.0 V VOUT(S) < 2.2 V
1.0
V1
2.2 V VOUT(S) < 2.4 V
0.8
V1
2.4 V VOUT(S) < 2.6 V
0.6
V1
2.6 V VOUT(S) < 3.0 V
0.45
V1
IOUT = 100 mA
Ta = +25°C
3.0 V VOUT(S) < 3.5 V
3.5 V VOUT(S) < 4.0 V
0.35
0.3
V1
V1
4.0 V VOUT(S) < 5.0 V
0.27
V1
5.0 V VOUT(S) < 7.0 V
0.23
V1
7.0 V VOUT(S) < 9.0 V
0.2
V1
9.0 V VOUT(S) 15.0 V
0.18
V1
2.0 V VOUT(S) < 2.2 V
1.12
V1
2.2 V VOUT(S) < 2.4 V
1.02
V1
2.4 V VOUT(S) < 2.6 V
0.92
V1
2.6 V VOUT(S) < 3.0 V
0.82
V1
IOUT = 200 mA
Ta = +25°C
3.0 V VOUT(S) < 3.5 V
3.5 V VOUT(S) < 4.0 V
0.72
0.62
V1
V1
4.0 V VOUT(S) < 5.0 V
0.55
V1
5.0 V VOUT(S) < 7.0 V
0.5
V1
7.0 V VOUT(S) < 9.0 V
0.45
V1
9.0 V VOUT(S) 15.0 V
0.4
V1
VOUT(S) + 1.0 V VIN 30 V, IOUT = 30 mA
0.05 0.3 %/V 1
VIN = 13.5 V, 2.0 V VOUT(S) < 5.1 V,
0.1 mA IOUT 40 mA
VIN = 13.5 V, 5.1 V VOUT(S) < 12.1 V,
0.1 mA IOUT 40 mA
VIN = 16.0 V, 12.1 V VOUT(S) 15.0 V,
0.1 mA IOUT 40 mA
VIN = 13.5 V,
ON / OFF pin = ON, 2.0 V VOUT(S) < 12.5 V
no load
VIN = VOUT(S) + 1.0 V,
ON / OFF pin = ON,
no load
12.5 V VOUT(S) 15.0 V
VIN = 13.5 V,
ON / OFF pin = OFF, 2.0 V VOUT(S) < 12.5 V
no load
VIN = VOUT(S) + 1.0 V,
ON / OFF pin = OFF, 12.5 V VOUT(S) 15.0 V
no load
3.0
20 70
20 150
25 215
4.0 9.0
4.0 9.0
0.1 2.5
0.1 2.5
50
mV
mV
mV
μA
μA
μA
μA
V
1
1
1
2
2
2
2
8


S-1142B (Seiko Instruments)
OPERATION CMOS VOLTAGE REGULATOR

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HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT 105°C OPERATION CMOS VOLTAGE REGULATOR
Rev.2.2_01
S-1142A/BxxH Series
Item
ON / OFF pin
input voltage "H"
ON / OFF pin
input voltage "L"
ON / OFF pin
input current "H"
ON / OFF pin
input current "L"
Ripple rejection
Short-circuit
current
Thermal shutdown
detection
temperature
Thermal shutdown
release
temperature
Symbol
VSH
VSL
ISH
ISL
|RR|
Ishort
TSD
TSR
Table 8 (2 / 2)
(Tj = 40°C ~ +125°C, Ta = 40°C ~ +105°C unless otherwise specified)
Condition
Min.
Typ. Max.
Unit
Test
Circuit
VIN = 13.5 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
VIN = 13.5 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
VIN = 13.5 V,
VON / OFF = 13.5 V
VIN = VOUT(S) + 1.0 V,
VON / OFF = 13.5 V
VIN = 13.5 V,
VON / OFF = 0 V
VIN = VOUT(S) + 1.0 V,
VON / OFF = 0 V
2.0 V VOUT(S) < 12.5 V
12.5 V VOUT(S) 15.0 V
2.0 V VOUT(S) < 12.5 V
12.5 V VOUT(S) 15.0 V
2.0 V VOUT(S) < 12.5 V
12.5 V VOUT(S) 15.0 V
2.0 V VOUT(S) < 12.5 V
12.5 V VOUT(S) 15.0 V
1.5
1.5
0.1
0.1
0.1
0.1
V
V
0.3 V
0.3 V
0.1 μA
0.1 μA
0.1 μA
0.1 μA
4
4
4
4
4
4
4
4
VIN = 13.5 V,
f = 100 Hz,
ΔVrip = 0.5 Vrms,
IOUT = 30 mA,
Ta = +25°C
2.0 V VOUT(S) < 2.3 V 50 dB 5
2.3 V VOUT(S) < 3.6 V 45 dB 5
3.6 V VOUT(S) < 6.1 V 40 dB 5
6.1 V VOUT(S) < 10.1 V
35
dB
5
10.1 V VOUT(S) < 12.5 V 30 dB 5
VIN = VOUT(S) + 1.0 V,
f = 100 Hz,
ΔVrip = 0.5 Vrms,
12.5 V VOUT(S) 15.0 V 30 dB 5
IOUT = 30 mA,
Ta = +25°C
VIN = 13.5 V,
ON / OFF pin = ON,
2.0 V VOUT(S) < 12.5 V
80
mA 3
VOUT = 0 V, Ta = +25°C
VIN = VOUT(S) + 1.0 V,
ON / OFF pin = ON,
12.5 V VOUT(S) 15.0 V
80
mA 3
VOUT = 0 V, Ta = +25°C
Junction temperature
150
°C
Junction temperature
125
°C
*1. VOUT(S): Set output voltage
VOUT(E): Actual output voltage
The output voltage when fixing IOUT (= 30 mA) and inputting 13.5 V or 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) + 2.0 V, and IOUT = 100 mA or 200 mA.
VIN1 is the input voltage at which the output voltage becomes 98% of VOUT3 after gradually decreasing the input
voltage.
*4. The output current can be at least this value.
Due to limitation of the package power dissipation, this value may not be satisfied. Attention should be paid to the
power dissipation of the package when the output current is large.
This specification is guaranteed by design.
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S-1142B (Seiko Instruments)
OPERATION CMOS VOLTAGE REGULATOR

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HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT 105°C OPERATION CMOS VOLTAGE REGULATOR
S-1142A/BxxH Series
Rev.2.2_01
Test Circuits
VIN VOUT
ON / OFF
VSS
Set to ON
+
A
+
V
Figure 5 Test Circuit 1
+
A VIN
VOUT
ON / OFF
VSS
Set to VIN or GND
Figure 6 Test Circuit 2
VIN VOUT
ON / OFF
VSS
Set to ON
+
A
+
V
Figure 7 Test Circuit 3
VIN VOUT
+
A ON / OFF
VSS
+
V RL
Figure 8 Test Circuit 4
VIN VOUT
ON / OFF
VSS
Set to ON
Figure 9 Test Circuit 5
+
V
RL
10


S-1142B (Seiko Instruments)
OPERATION CMOS VOLTAGE REGULATOR

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HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT 105°C OPERATION CMOS VOLTAGE REGULATOR
Rev.2.2_01
S-1142A/BxxH Series
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 0.1 μF or more can be used as CL.
Figure 10
Caution The above connection diagram and constants will not guarantee successful operation. Perform
thorough evaluation using an actual application to set the constants.
Condition of Application
Input capacitor (CIN): 0.1 μF or more
Output capacitor (CL): 0.1 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-1142A/BxxH 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 0.1 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 0.1 μF or more.
The values of output overshoot and undershoot, which are transient response characteristics, vary depending on the
value of the output capacitor.
The required value of capacitance for the input capacitor differs depending on the application.
Set the value for input capacitor (CIN) and output capacitor (CL) as follows.
CIN 0.1 μF
CL 0.1 μF
Caution Define the capacity values of CIN and CL by sufficient evaluation including the temperature characteristics
under the actual usage conditions.
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OPERATION CMOS VOLTAGE REGULATOR

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HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT 105°C OPERATION CMOS VOLTAGE REGULATOR
S-1142A/BxxH Series
Rev.2.2_01
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 ±3.0% under specified conditions of fixed input voltage*1, fixed
output current, and fixed temperature.
*1. 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 against the input voltage. That is, the value shows how much the
output voltage changes due to a change in the input voltage after fixing output current constant.
4. Load regulation (ΔVOUT2)
Indicates the dependency of the output voltage against the output current. That is, the value shows how much the
output voltage changes due to a change in the output current after fixing input voltage constant.
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) + 2.0 V.
Vdrop = VIN1 (VOUT3 × 0.98)
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OPERATION CMOS VOLTAGE REGULATOR

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HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT 105°C OPERATION CMOS VOLTAGE REGULATOR
Rev.2.2_01
S-1142A/BxxH Series
Operation
1. Basic operation
Figure 11 shows the block diagram of the S-1142A/BxxH 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
+
Reference voltage
circuit
*1
Rf
Vfb
Rs
VOUT
VSS
*1. Parasitic diode
Figure 11
2. Output transistor
In the S-1142A/BxxH 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 reverse
current flowing from the VOUT pin through a parasitic diode to the VIN pin, when the potential of VOUT became
higher than VIN.
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OPERATION CMOS VOLTAGE REGULATOR

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S-1142A/BxxH Series
Rev.2.2_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. The VOUT pin is set to the VSS level by the internal dividing resistor of several MΩ between the VOUT
pin and the VSS pin.
Note that the current consumption increases when a voltage of 0.3 V to VIN 0.3 V is applied to the ON / OFF pin.
The ON / OFF pin is configured as shown in Figure 12. Since the ON / OFF pin is neither pulled down nor pulled up
internally, do not use it in the floating status. When not using the ON / OFF pin, connect it to the VSS pin in the
product A type, and connect it to the VIN pin in the B type.
Product Type
A
A
B
B
ON / OFF Pin
"L": ON
"H": OFF
"L": OFF
"H": ON
Table 9
Internal Circuit VOUT Pin Voltage
Operate
Set value
Stop
Stop
VSS level
VSS level
Operate
Set value
Current Consumption
ISS1
ISS2
ISS2
ISS1
VIN
ON / OFF
VSS
Figure 12
4. Overcurrent protection circuit
The S-1142A/BxxH 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. 80 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 of the package.
14


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OPERATION CMOS VOLTAGE REGULATOR

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HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT 105°C OPERATION CMOS VOLTAGE REGULATOR
Rev.2.2_01
S-1142A/BxxH Series
5. Thermal shutdown circuit
The S-1142A/BxxH 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 125°C typ., the thermal shutdown circuit is released to restart regulating.
Due to self-heating of the S-1142A/BxxH Series, if the thermal shutdown circuit starts operating, it stops regulating
so that the output voltage drops. When regulation stops, the S-1142A/BxxH 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 this IC 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 10
Thermal Shutdown Circuit
VOUT Pin Voltage
Operate: 150°C typ.*1
Release: 125°C typ.*1
VSS level
Set value
*1. Junction temperature
15


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OPERATION CMOS VOLTAGE REGULATOR

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HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT 105°C OPERATION CMOS VOLTAGE REGULATOR
S-1142A/BxxH Series
Rev.2.2_01
6. Overshoot of output voltage
Overshoot of output voltage occurs depending on the condition such as the rising speed of input voltage (VIN).
Overshoot voltage is the difference between the maximum value of output voltage generated by the fluctuation of
VIN and the actual output voltage (VOUT(E)) value.
6. 1 At normal operation
As shown in Figure 13, Vgs is the voltage difference between VIN and gate voltage of output driver.
The error amplifier controls Vgs in order to keep the output voltage constant depending on the fluctuation of VIN
and the output load.
VIN
Vref
+
Vgs
Output driver
Output voltage
Output
capacitance Output load
Figure 13 Circuit Diagram
6. 2 Occurrence of overshoot
If VIN voltage rises at a fast speed, Vgs may become large when gate voltage of output driver can not follow the
speed of VIN. When Vgs becomes large, the current supplied from output driver is increased transiently. Thereby,
output voltage rises, and then overshoot occurs.
Note that overshoot voltage is greatly affected by the following use conditions or temperature, etc.
When VIN rises in the range of 2.0 V to VOUT(E).
When the rising speed of VIN is fast.
When the output capacitance is small.
When the output load is small.
Input voltage (VIN)
Rising speed of VIN =
ΔV
t
VIN = 2.0 V to VOUT(E)
ΔV
Output voltage (VOUT(E))
VOUT(E)
VIN = 2.0 V to VOUT(E)
Overshoot voltage
Rising time (t)
Figure 14 VIN and Overshoot Voltage
Caution Under the following conditions, overshoot voltage tends to become larger especially.
When VIN rises from around 98% of VOUT(E).
When the rising speed of VIN is 10 mV/μs or more.
Remark When overshoot of the S-1142A/BxxH Series has some influences, consider to use the S-1142C/DxxH Series.
16


S-1142B (Seiko Instruments)
OPERATION CMOS VOLTAGE REGULATOR

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HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT 105°C OPERATION CMOS VOLTAGE REGULATOR
Rev.2.2_01
S-1142A/BxxH 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 (0.1 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-1142A/BxxH Series. However, be sure to perform sufficient evaluation under
the actual usage conditions for selection, including evaluation of temperature characteristics. Refer to "6. 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):
0.1 μF or more
0.1 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.
Sufficiently evaluate the output voltage fluctuations caused by the power supply or the load fluctuations 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
package 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 8 in
"Electrical Characteristics" and footnote *4 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.
17


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OPERATION CMOS VOLTAGE REGULATOR

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HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT 105°C OPERATION CMOS VOLTAGE REGULATOR
S-1142A/BxxH Series
Rev.2.2_01
Characteristics (Typical Data)
1. Output voltage vs. Output current (When load current increases) (Ta = +25°C)
1. 1 VOUT = 2.0 V
2.5
2.0
13.5 V
1.5
1.0 VIN = 3.0 V
0.5
4.0 V
0
0 100 200 300 400 500 600 700 800
IOUT [mA]
1. 2 VOUT = 5.0 V
6
5
4
3
2
VIN = 5.5 V
6.0 V
13.5 V
7.0 V
1
0
0 100 200 300 400 500 600 700 800
IOUT [mA]
1. 3 VOUT = 12.0 V
14
12
10
8
6
13.5 V
VIN = 12.5 V
13.0 V
4
2
0
0 100 200 300 400 500 600 700 800
IOUT [mA]
Remark In determining the output current, attention should
be paid to the following.
1. The minimum output current value and
footnote *4 of Table 8 in the "Electrical
Characteristics"
2. Power dissipation of the package
2. Output voltage vs. Input voltage (Ta = +25°C)
2. 1 VOUT = 2.0 V
2.2
2.1
2.0
1.9
1.8
1.7
1.6
IOUT = 1 mA
30 mA
50 mA
1.5
0
5 10 15 20 25 30
VIN [V]
2. 3 VOUT = 12.0 V
12.4
12.2
12.0
IOUT = 1 mA
11.8
11.6
11.4
30 mA
50 mA
11.2
11.0
10 15 20
VIN [V]
25
30
2. 2 VOUT = 5.0 V
5.2
5.1
5.0
4.9
4.8
4.7
4.6
IOUT = 1 mA
30 mA
50 mA
4.5
0
5 10 15 20 25 30
VIN [V]
18


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HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT 105°C OPERATION CMOS VOLTAGE REGULATOR
Rev.2.2_01
S-1142A/BxxH Series
3. Dropout voltage vs. Output current
3. 1 VOUT = 2.0 V
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
Tj = +125C
+25C
40C
50 100 150 200
IOUT [mA]
3. 3 VOUT = 12.0 V
0.50
0.45
0.40
0.35
Tj = 125C
0.30
0.25 25C
0.20
0.15
0.10
40C
0.05
0
0 50 100 150 200
IOUT [mA]
250
250
4. Dropout voltage vs. Temperature
4. 1 VOUT = 2.0 V
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
40 25
0
IOUT = 100 mA
10 mA
25 50 75 100 125
Tj [C]
4. 3 VOUT = 12.0 V
0.30
0.25
0.20
0.15
0.10
0.05
0
40 25 0
IOUT = 100 mA
10 mA
25 50 75 100 125
Tj [C]
3. 2 VOUT = 5.0 V
0.7
0.6
0.5
0.4
Tj = 125C
25C
0.3
0.2
0.1
40C
0
0 50 100 150 200
IOUT [mA]
250
4. 2 VOUT = 5.0 V
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
40 25
0
IOUT = 100 mA
10 mA
25 50 75 100 125
Tj [C]
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OPERATION CMOS VOLTAGE REGULATOR

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HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT 105°C OPERATION CMOS VOLTAGE REGULATOR
S-1142A/BxxH Series
Rev.2.2_01
5. Dropout voltage vs. Set output voltage (Tj = +25°C)
1.2
1.0
IOUT = 200 mA
100 mA
0.8 30 mA
0.6
10 mA
1 mA
0.4
0.2
0
0 2 4 6 8 10 12 14
VOUT(S) [V]
6. Output voltage vs. Temperature
6. 1 VOUT = 2.0 V
2.04
VIN = 13.5 V
6. 2 VOUT = 5.0 V
5.2
VIN = 13.5 V
2.02
2.00
1.98
1.96
40 25 0
6. 3 VOUT = 12.0 V
12.4
25 50 75 100 125
Tj [C]
VIN = 13.5 V
5.1
5.0
4.9
4.8
40 25 0
25 50 75 100 125
Tj [C]
12.2
12.0
11.8
11.6
40 25 0
25 50 75 100 125
Tj [C]
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OPERATION CMOS VOLTAGE REGULATOR

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HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT 105°C OPERATION CMOS VOLTAGE REGULATOR
Rev.2.2_01
S-1142A/BxxH Series
7. Current consumption during operation vs. Input voltage (When ON / OFF pin is ON, no load)
7. 1 VOUT = 2.0 V
16
14
12
10
8
6
4
2
0
05
Tj = 125C
25C
40C
10 15 20 25 30
VIN [V]
7. 2 VOUT = 5.0 V
16
14
12
10
8
6
4
2
0
05
Tj = 125C
25C
40C
10 15 20 25 30
VIN [V]
7. 3 VOUT = 12.0 V
16
14
12
10
8
6
4
2
0
0
5
Tj = 125C
25C
40C
10 15 20 25 30
VIN [V]
8. Current consumption during operation vs. Temperature
8. 1 VOUT = 2.0 V
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
40 25
0
VIN = 13.5 V
25 50 75 100 125
Tj [C]
8. 2 VOUT = 5.0 V
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
40 25
0
8. 3 VOUT = 12.0 V
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
40 25
0
VIN = 13.5 V
25 50 75 100 125
Tj [C]
VIN = 13.5 V
25 50 75 100 125
Tj [C]
21


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OPERATION CMOS VOLTAGE REGULATOR

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HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT 105°C OPERATION CMOS VOLTAGE REGULATOR
S-1142A/BxxH Series
Rev.2.2_01
9. Current consumption during operation vs. Output current (Ta = +25°C)
9. 1 VOUT = 2.0 V
160
140
120
100
80
60
40
20
0
0 25
VIN = 13.5 V
3.0 V
50 75 100 125 150
IOUT [mA]
9. 2 VOUT = 5.0 V
160
140
120
100
80
60
40
20
0
0 25
VIN = 13.5 V
6.0 V
50 75 100 125
IOUT [mA]
150
9. 3 VOUT = 12.0 V
160
140
120
100
80
60
40
20
0
0 25
VIN = 20.0 V
13.0 V
50 75 100 125 150
IOUT [mA]
10. Output current vs. Input voltage*1
10. 1 VOUT = 3.3 V
250
200
150
100 Ta = +105C
+25C
50
0
0 5 10 15 20 25 30 35
VIN [V]
10. 2 VOUT = 5.0 V
250
200
150
100 Ta = +105C
50
0
0 5 10 15 20
VIN [V]
+25C
25 30
35
*1. When mounted on board
[Mounted board]
(1) Board size:
50 mm × 50 mm × t1.6 mm
(2) Board material: Glass epoxy resin (two layers)
(3) Wiring ratio: Surface approx. 75%, reverse side approx. 90%
(4) Through hole: Diameter 0.5 mm × 24
22


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OPERATION CMOS VOLTAGE REGULATOR

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HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT 105°C OPERATION CMOS VOLTAGE REGULATOR
Rev.2.2_01
S-1142A/BxxH Series
11. Ripple rejection (Ta = +25°C)
11. 1
11. 3
VOUT = 2.0 V
80
70
60
50
40
30
20
10
0
10
100
VOUT = 12.0 V
60
50
40
30
20
10
VIN = 13.5 V, CL = 0.1 μF
IOUT = 1 mA
30 mA
100 mA
1k 10k 100k 1M
Frequency [Hz]
VIN = 13.5 V, CL = 0.1 μF
IOUT = 1 mA
30 mA
100 mA
0
10 100 1k 10k 100k 1M
Frequency [Hz]
11. 2
VOUT = 5.0 V
70
60
50
40
30
20
10
0
10
100
VIN = 13.5 V, CL = 0.1 μF
IOUT = 1 mA
30 mA
100 mA
1k 10k 100k 1M
Frequency [Hz]
23


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OPERATION CMOS VOLTAGE REGULATOR

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HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT 105°C OPERATION CMOS VOLTAGE REGULATOR
S-1142A/BxxH Series
Rev.2.2_01
Reference Data
1. Characteristics of input transient response (Ta = +25°C)
1. 1 VOUT = 2.0 V
IOUT = 30 mA, CIN = 0.1 μF, VIN = 11.5 V 13.5 V, tr = tf = 5.0 μs
2.5 14
2.4 VIN
2.3
2.2 VOUT
2.1
CL = 10 μF
22 μF
13
12
11
10
2.0 9
1.9 8
200 0 200 400 600 800 1000 1200
t [μs]
1. 2 VOUT = 5.0 V
IOUT = 30 mA, CIN = 0.1 μF, VIN = 11.5 V 13.5 V, tr = tf = 5.0 μs
6.0 14
5.8 VIN
5.6
13
12
5.4 VOUT
5.2
CL = 10 μF
22 μF
11
10
5.0 9
4.8 8
200 0 200 400 600 800 1000 1200
t [μs]
1. 3 VOUT = 12.0 V
IOUT = 30 mA, CIN = 0.1 μF, VIN = 13.5 V 15.5 V, tr = tf = 5.0 μs
13.2 16
13.0 VIN
15
12.8 14
12.6
12.4
12.2
VOUT
CL = 10 μF
22 μF
13
12
11
12.0 10
11.8 9
200 0 200 400 600 800 1000 1200
t [μs]
2. Characteristics of load transient response (Ta = +25°C)
2. 1 VOUT = 2.0 V
VIN = 13.5 V, CIN = 0.1 μF, IOUT = 50 mA 100 mA
2.4 150
2.3 IOUT
2.2
100
50
2.1
2.0 VOUT
CL = 10 μF
0
50
1.9 22 μF
100
1.8 150
200 0 200 400 600 800 1000 1200
t [μs]
2. 2 VOUT = 5.0 V
VIN = 13.5 V, CIN = 0.1 μF, IOUT = 50 mA 100 mA
5.8 150
5.6 IOUT
5.4
100
50
5.2
5.0 VOUT
CL = 10 μF
0
50
4.8 22 μF
100
4.6 150
200 0 200 400 600 800 1000 1200
t [μs]
2. 3 VOUT = 12.0 V
VIN = 13.5 V, CIN = 0.1 μF, IOUT = 50 mA 100 mA
14.0 150
13.5 IOUT
13.0
100
50
12.5
12.0 VOUT
CL = 22 μF
0
50
11.5 10 μF
100
11.0 150
200 0 200 400 600 800 1000 1200
t [μs]
24


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OPERATION CMOS VOLTAGE REGULATOR

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HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT 105°C OPERATION CMOS VOLTAGE REGULATOR
Rev.2.2_01
S-1142A/BxxH Series
3. Transient response characteristics of ON / OFF pin (Ta = +25°C)
3. 1 VOUT = 3.3 V
VIN = 13.5 V, CL = 10 μF, CIN = 0.1 μF,
IOUT = 100 mA, VON / OFF = 0 V 13.5 V
15 18
12 12
9 VON/OFF
6
60
3
0 VOUT
6
12
3
500
18
0 500 1000 1500 2000
t [μs]
3. 2 VOUT = 5.0 V
VIN = 13.5 V, CL = 10 μF, CIN = 0.1 μF,
IOUT = 100 mA, VON / OFF = 0 V 13.5 V
15 18
12 12
9 VON/OFF
6
60
3
0 VOUT
6
12
3
500
18
0 500 1000 1500 2000
t [μs]
4. Load transient response characteristics dependent on capacitance (Ta = +25°C)
4. 1 VOUT = 5.0 V
VIN = 13.5 V, CIN = 0.1 μF, IOUT = 50 mA 100 mA
0.5
VIN = 13.5 V, CIN = 0.1 μF, IOUT = 100 mA 50 mA
0.5
0.4 0.4
0.3 0.3
0.2 0.2
0.1 0.1
0
0 20 40 60 80 100
CL [μF]
0
0 20 40 60 80 100
CL [μF]
5. Input transient response characteristics dependent on capacitance (Ta = +25°C)
5. 1 VOUT = 5.0 V
VIN = 7.0 V 12.0 V, tr = 5.0 μs, CIN = 0.1 μF, IOUT = 30 mA
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0 20 40 60 80 100
CL [μF]
VIN = 12.0 V 7.0 V, tr = 5.0 μs, CIN = 0.1 μF, IOUT = 30 mA
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0 20 40 60 80 100
CL [μF]
25


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HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT 105°C OPERATION CMOS VOLTAGE REGULATOR
S-1142A/BxxH Series
Rev.2.2_01
6. Example of equivalent series resistance vs. Output current characteristics (Ta = +25°C)
CIN = CL = 0.1 μF
100 VIN
Stable
0 0.1
IOUT [mA]
200
Figure 15
CIN S-1142A/BxxH
Series
ON / OFF
VSS
VOUT
CL*1
RESR
*1. CL: TDK Corporation C3216X8R2A104K (0.1 μF)
Figure 16
26


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HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT 105°C OPERATION CMOS VOLTAGE REGULATOR
Rev.2.2_01
S-1142A/BxxH Series
Marking Specification
1. HSOP-6
Top view
654
(1) (2) (3) (4) (5) (6)
(7) (8) (9) (10) (11) (12)
(13) (14) (15) (16)
(1) to (5):
(6):
(7), (8):
(9):
(10) to (16):
Product name: S1142 (Fixed)
Product type
Value of output voltage
Operation temperature
Lot number
123
27


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OPERATION CMOS VOLTAGE REGULATOR

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5.02±0.2
6 54
1
0.4±0.05
2
1.67±0.05
3
0.20±0.05
1.91
1.91
No. FH006-A-P-SD-2.0
TITLE
No.
SCALE
UNIT
HSOP6-A-PKG Dimensions
FH006-A-P-SD-2.0
mm
SII Semiconductor Corporation


S-1142B (Seiko Instruments)
OPERATION CMOS VOLTAGE REGULATOR

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2.0±0.05
ø1.55±0.05
4.0±0.1(10 pitches:40.0±0.2)
0.3±0.05
5°max.
ø2.0±0.05
6.7±0.1
8.0±0.1
2.1±0.1
16
34
Feed direction
No. FH006-A-C-SD-1.0
TITLE
No.
SCALE
UNIT
HSOP6-A-Carrier Tape
FH006-A-C-SD-1.0
mm
SII Semiconductor Corporation


S-1142B (Seiko Instruments)
OPERATION CMOS VOLTAGE REGULATOR

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60°
Enlarged drawing in the central part
ø21±0.8
2±0.5
ø13±0.2
2±0.5
13.5±0.5
No. FH006-A-R-SD-1.0
TITLE
No.
SCALE
UNIT
HSOP6-A-Reel
FH006-A-R-SD-1.0
QTY.
2,000
mm
SII Semiconductor Corporation




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