ISL9305H datasheet(3/17 Pages) INTERSIL

Part #	ISL9305H

Description	3MHz Dual 1.5A Step-Down Converters and Dual Low-Input LDOs with I2C Compatible Interface

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Manufacturer	INTERSIL [Intersil Corporation]

Direct Link	http://www.intersil.com/cda/home

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ISL9305H

3

FN7724.1

October 5, 2011

Block Diagram

11

FB2

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.

12

VINDCD2

Input voltage for buck converter DCD2.

13

SW2

Switching node for DCD2, connect to one terminal of the inductor.

14

GNDDCD2

Power ground for DCD2.

15

GNDDCD1

Power ground for DCD1.

16

SW1

Switching node for DCD1, connect to one terminal of the inductor.

E-PAD

Exposed Pad. Connect to system ground.

Pin Descriptions (Continued)

PIN NUMBER

(TQFN)

NAME

DESCRIPTION

LDO1

300mA

I2C

INTERFACE

DCD2

BUCK

CONVERTER

UVLO

VREF

OSC

VINDCD1

FB1

SW1

GNDDCD1

VINDCD2

FB2

SW2

GNDDCD2

VINLDO1

VOLDO1

VINLDO2

VOLDO2

SDAT

SCLK

DCDPG

GNDLDO

10µF

1µF

10µF

1µF

1.5µH

DCD1

BUCK

CONVERTER

OVERCURRENT

PROTECTION

ANALOG/LOGIC

CIRCUIT INPUT

THERMAL

SHUTDOWN

PGOOD WITH

1~200ms

DELAY TIME

LDO2

300mA

SHORT

CIRCUIT

PROTECTION

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