PIN ASSIGNMENTS

SW

VSEL

FB

EN

GND

VIN

1

2

3

4

5

6

TopviewDRVpackage

Zero-Pole

AMP.

Integrator

Error Amp.

PFMComparator

PWM

Comp.

VREF

Control

Stage

GateDriver

Anti

Shoot-Through

Current

LimitComparator

Current

LimitComparator

VREF+1%

FB

FB

VIN

GND

2.25MHz

Oscillator

SW1

EN

VIN

Softstart

VOUT RAMP

CONTROL

Thermal

Shutdown

Reference

0.6VVREF

Undervoltage

Lockout1.8V

Limit

HighSide

Limit

LowSide

Sawtooth

Generator

FB

RI1

RI..N

VSEL

GND

InternalVoltage

SettingNetwork

TPS62270

TPS62273

TERMINAL FUNCTIONS

TERMINAL

I/O

DESCRIPTION

NO.

NAME

(SON)

5

PWR

VIN power supply pin.

GND

6

PWR

GND supply pin

EN

4

I

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

1

OUT

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

terminal

FB

3

I

Feedback Pin for the internal regulation loop. Connect the external resistor divider to this pin. In case of fixed

output voltage option, connect this pin directly to the output capacitor

VSEL

2

I

Voltage Select input. Please refer to table ordering information for available output voltage selections.

FUNCTIONAL BLOCK DIAGRAM

4

Submit Documentation Feedback

Copyright © 2007–2008, Texas Instruments Incorporated

Product Folder Link(s): TPS62270 TPS62273