ISL9305H Datasheet PDF - Intersil Corporation

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ISL9305H
Intersil Corporation

Part Number ISL9305H
Description 3MHz Dual 1.5A Step-Down Converters and Dual Low-Input LDOs
Page 17 Pages


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3MHz Dual 1.5A
Low-Input LDOs
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ISL9305H
The ISL9305H is an integrated mini Power Management IC
(mini-PMIC) for powering low-voltage microprocessor, or
applications using a single Li-Ion or Li-Polymer cell battery to
power multiple voltage rails. ISL9305H integrates two
high-efficiency 3MHz synchronous step-down converters (DCD1
and DCD2) and two low-input, low-dropout linear regulators
(LDO1 and LDO2).
The 3MHz PWM switching frequency allows the use of very
small external inductors and capacitors. Both step-down
converters can enter skip mode under light load conditions to
further improve the efficiency and maximize the battery life.
For noise sensitive applications, they can also be programmed
through I2C interface to operate in forced PWM mode
regardless of the load current condition. The I2C interface
supports on-the-fly slew rate control of the output voltage from
0.825V to 3.6V at 25mV/step size for dynamic power saving.
Each step-down converter can supply up to 1.5A load current.
The default output voltage can be set from 0.8V to VIN using
external feedback resistors on the adjustable version, or the
ISL9305H can be ordered in factory pre-set power-up default
voltages in increments of 100mV from 0.9V to 3.6V.
The ISL9305H also provides two 300mA low dropout (LDO)
regulators. The input voltage range is 1.5V to 5.5V allowing them
to be powered from one of the on-chip step-down converters or
directly from the battery. The default LDO output comes with
factory pre-set fixed output voltage options between 0.9V to 3.3V.
The ISL9305H is available in a 4mmx4mm 16 Ld TQFN
package.
Related Literature
FN7605, ISL9305 Data Sheet
AN1564 “ISL9305IRTZEVAL1Z and ISL9305HIRTZEVAL1Z
Evaluation Boards”
Features
• Dual 1.5A, Synchronous Step-down Converters and Dual
300mA, General-purpose LDOs
• Input Voltage Range
- DCD1/DCD2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5V to 5.5V
- LDO1/LDO2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5V to 5.5V
• 400kb/s I2C-Bus Series Interface Transfers the Control Data
Between the Host Controller and the ISL9305H
• Adjustable Output Voltage
- DCD1/DCD2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.8V to VIN
- Fixed Output I2C Programmability
• At 25mV/Step . . . . . . . . . . . . . . . . . . . . . . . . . . 0.825V to 3.6V
• LDO1/LDO2 Output Voltage I2C Programmability
- At 50mV/Step . . . . . . . . . . . . . . . . . . . . . . . . . . 0.9V to 3.3V
• 50μA IQ (Typ) with DCD1/DCD2 in Skip Mode; 20μA IQ (Typ)
for Each Enabled LDO
• On-the-fly I2C Programming of DC/DC and LDO Output
Voltages
• DCD1/DCD2 I2C Programmable Skip Mode Under Light
Load or Forced Fixed Switching Frequency PWM Mode
• Small, Thin 4mmx4mm TQFN Packagewww.DataSheet.co.kr
Applications
• Cellular Phones, Smart Phones
• PDAs, Portable Media Players, Portable Instruments
• Single Li-Ion/Li-Polymer Battery-Powered Equipment
• DSP Core Power
October 5, 2011
FN7724.1
2.5V TO 5.5V
C10
10µF
1.5V TO 5.5V
1.5V TO 5.5V
C2
1µF
C3
1µF
VINDCD1
VINDCD2
PG
SW1
FB1
SDAT
SCLK
VINLDO1
ISL9305H
SW2
FB2
VINLDO2
VOLDO1
VOLDO2
GNDDCD1 GNDDCD2 GNDLDO
L1 = 1.5µH
R1
L2 = 1.5µH
R3
C6
1µF
1.5A
*
R2
C4
10µF
1.5A
*
R4
C5
10µF
300mA
300mA
C7
1µF
*ONLY FOR ADJUSTABLE OUTPUT VERSION. FOR FIXED OUTPUT VERSION, DIRECTLY
CONNECT THE FB PIN TO THE OUTPUT OF THE BUCK CONVERTER.
FIGURE 1. TYPICAL APPLICATION DIAGRAM
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas Inc. 2010, 2011. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
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ISL9305H
PARTS
DESCRIPTION
L1, L2 Inductor
C1 Input capacitor
C2, C3 Intput capacitor
C4, C5 Output capacitor
C6, C7 Output capacitor
R1, R2, Resistor
R3, R4
TABLE 1. TYPICAL APPLICATION PARTS LIST
MANUFACTURER
PART NUMBER
SPECIFICATIONS
Sumida
CDRH2D14NP-1R5
1.5µH/1.80A/50m
Murata
GRM21BR60J106KE19L
10µF/6.3V
Murata
GRM185R60J105KE26D 1µF/6.3V
Murata
GRM21BR71A106KE51L 10µF/6.3V
Murata
GRM185R60J105KE26D 1µF/6.3V
Various
1%, SMD, 0.1W
Pin Configuration
ISL9305H
(16 LD 4X4 TQFN)
TOP VIEW
SIZE
3.0mmx3.0mmx1.55mm
0805
0603
0805
0603
0603
16 15 14 13
VINDCD1 1
12 VINDCD2
FB1 2
SCLK 3
SDAT 4
5
E-PAD
67
11 FB2
10 DCDPG
9 GNDLDO
8
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Pin Descriptions
PIN NUMBER
(TQFN)
1
2
3
4
5
6
7
8
9
10
NAME
VINDCD1
FB1
SCLK
SDAT
VINLDO1
VOLDO1
VOLDO2
VINLDO2
GNDLDO
DCDPG
DESCRIPTION
Input voltage for buck converter DCD1 and it also serves as the power supply pin for the whole internal digital/analog
circuits.
Feedback pin for DCD1, connect external voltage divider resistors between DCDC1 output, this pin and ground. For
fixed output versions, connect this pin directly to the DCD1 output.
I2C interface clock pin.
I2C interface data pin.
Input voltage for LDO1.
Output voltage of LDO1.
Output voltage of LDO2.
Input voltage for LDO2.
Power ground for LDO1 and LDO2.
The DCDPG pin is an open-drain output to indicate the state of the DCD1/DCD2 output voltages. When both DCD1
and DCD2 are enabled, the output is released to be pulled high by an external pull-up resistor if both converter
voltages are within the power good range. The pin will be pulled low if either DCD is outside their range. When only
one DCD is enabled, the state of the enabled DCD’s output will define the state of the DCDPG pin. The DCDPG state
can be programmed for a delay of up to 200ms before being released to rise high. The programming range is
1ms~200ms through the I2C interface.
2 FN7724.1
October 5, 2011
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ISL9305H
Pin Descriptions (Continued)
PIN NUMBER
(TQFN)
11
12
13
14
15
16
E-PAD
NAME
FB2
VINDCD2
SW2
GNDDCD2
GNDDCD1
SW1
E-PAD
DESCRIPTION
Feedback pin for DCD2, connect external voltage divider resistors between DCD2 output, this pin and ground. For
fixed output versions, connect this pin directly to the DCD2 output.
Input voltage for buck converter DCD2.
Switching node for DCD2, connect to one terminal of the inductor.
Power ground for DCD2.
Power ground for DCD1.
Switching node for DCD1, connect to one terminal of the inductor.
Exposed Pad. Connect to system ground.
Block Diagram
DCDPG
PGOOD WITH
1~200ms
DELAY TIME
UVLO
VREF
OSC
SDAT
SCLK
I2C
INTERFACE
SHORT
CIRCUIT
PROTECTION
ANALOG/LOGIC
CIRCUIT INPUT
DCD1
BUCK
CONVERTER
OVERCURRENT
PROTECTION
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DCD2
BUCK
CONVERTER
THERMAL
SHUTDOWN
LDO1
300mA
LDO2
300mA
VINDCD1
SW1
1.5µH
FB1
GNDDCD1
VINDCD2
SW2
1.5µH
FB2
GNDDCD2
VINLDO1
VOLDO1
VINLDO2
VOLDO2
GNDLDO
10µF
10µF
10µF
10µF
1µF
10µF
1µF
10µF
3 FN7724.1
October 5, 2011
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ISL9305H
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
PART
MARKING
FBSEL
DCD1
(V)
FBSEL
DCD2
(V)
SLV
LDO1
(V)
SLV
LDO2
(V)
TEMP. RANGE
(°C)
PACKAGE
Tape & Reel
(Pb-free)
PKG.
DWG. #
ISL9305IRTHAANLZ-T 9305I HAANLZ
Adj Adj 3.3 2.9
-40 to +85
16 Ld TQFN
L16.4x4G
ISL9305IRTHWBNLZ-T 9305I HWBNLZ
1.2 1.5 3.3 2.9
-40 to +85
16 Ld TQFN
L16.4x4G
ISL9305IRTHWCLBZ-T 9305I HWCLBZ
1.2 1.8 2.9 1.5
-40 to +85
16 Ld TQFN
L16.4x4G
ISL9305IRTHWCNYZ-T 9305I HWCNYZ
1.2 1.8 3.3 0.9
-40 to +85
16 Ld TQFN
L16.4x4G
ISL9305IRTHWCNLZ-T 9305I HWCNLZ
1.2 1.8 3.3 2.9
-40 to +85
16 Ld TQFN
L16.4x4G
ISL9305IRTHWLNCZ-T 9305I HWLNCZ
1.2 2.9 3.3 1.8
-40 to +85
16 Ld TQFN
L16.4x4G
ISL9305IRTHBCNLZ-T 9305I HBCNLZ
1.5 1.8 3.3 2.9
-40 to +85
16 Ld TQFN
L16.4x4G
ISL9305IRTHBFNCZ-T 9305I HBFNCZ
1.5 2.5 3.3 1.8
-40 to +85
16 Ld TQFN
L16.4x4G
ISL9305IRTBCNLZEV1Z Evaluation Board
ISL9305IRTBFNCZEV1Z Evaluation Board
ISL9305IRTAANLZEV1Z Evaluation Board
NOTES:
1. Please refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-
free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see device information page for ISL9305H. For more information on MSL please see techbrief TB363.
www.DataSheet.co.kr
4 FN7724.1
October 5, 2011
Datasheet pdf - http://www.DataSheet4U.net/



ISL9305H datasheet pdf
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ISL9305H pdf
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Related : Start with ISL9305 Part Numbers by
ISL9305 3MHz Dual Step-Down Converters and Dual Low-Input LDOs ISL9305
Intersil
ISL9305 pdf
ISL9305H 3MHz Dual 1.5A Step-Down Converters and Dual Low-Input LDOs ISL9305H
Intersil Corporation
ISL9305H pdf

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