1

2

3

6

5

4

MODE

SW

VIN

FB

EN

GND

DRY PACKAGE

(TOP VIEW)

GateDriver

Anti

Shoot-Through

Current

LimitComparator

SW

Softstart

Bandgap

Undervoltage

Lockout

Limit

HighSide

Limit

LowSide

FB

EN

MODE

VIN

GND

Min.On Time

Min.OFF Time

VIN

EN

Integrated

FeedBack

Network

VREF

FB

Error

Comparator

Zero/Negative

CurrentLimitComparator

Control

Logic

PMOS

NMOS

MODE

Thermal

Shutdown

VREF

0.70V

TPS62231-Q1

TPS622314-Q1

www.ti.com

SLVSB63

– DECEMBER 2011

PIN FUNCTIONS

PIN

I/O

DESCRIPTION

NAME

NO

VIN

3

PWR

GND

4

PWR

GND supply pin

EN

5

IN

This is the enable pin of the device. Pulling this pin to low forces the device into shutdown mode. Pulling

this pin to high enables the device. This pin must be terminated.

SW

2

OUT

This is the switch pin and is connected to the internal MOSFET switches. Connect the inductor to this

terminal

FB

6

IN

Feedback Pin for the internal regulation loop. Connect this pin directly to the output capacitor.

MODE

1

IN

MODE pin = high forces the device to operate in PWM mode. Mode = low enables the Power Save Mode

with automatic transition from PFM (Pulse frequency mode) to PWM (pulse width modulation) mode.

FUNCTIONAL BLOCK DIAGRAM

Copyright

© 2011, Texas Instruments Incorporated

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