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ISL6322G

Two-Phase Buck PWM Controller with Integrated MOSFET Drivers, I2C Interface, and Phase Dropping

Intersil 

ISL6322G

Block Diagram

VSEN

RGND

VDIFF

OPEN SENSE

LINE PREVENTION

x1

OVERVOLTAGE

AND

UNDERVOLTAGE

DETECTION

LOGIC

SS/RST/A0

SCL

SDA

I2C

LOGIC

VRSEL

MODE/DAC

SELECT

PGOOD

SOFT-START

AND

FAULT LOGIC

0.2V

LOAD APPLY

TRANSIENT

ENHANCEMENT

CLOCK AND

MODULATOR

WAVEFORM

GENERATOR

EN

0.85V

POWER-ON

RESET

VCC

PVCC

MOSFET

DRIVER

BOOT1

UGATE1

PHASE1

LGATE1

FS

VID7

VID6

VID5

VID4

VID3

VID2

VID1

VID0

REF

FB

COMP

OFS

DYNAMIC

VID

D/A

OFFSET

PWM1

∑

∑

E/A

CHANNEL

CURRENT

IAVG 1

BALANCE

AND CURRENT

N

LIMIT

ISEN1

CH1

CURRENT

SENSE

∑

ISEN2

CH2

CURRENT

SENSE

PWM2

MOSFET

DRIVER

I2C

PH2

DETECT

OCP

OCP

ITRIP

ISEN1+ISEN2

OCP

OCP

2.0V

BOOT2

UGATE2

PHASE2

LGATE2

EN_PH2

IOUT

GND

3

ISEN1- ISEN1+

ISEN2- ISEN2+

FN6715.0

May 22, 2008

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