GND

A1

B1

C1

A2

B2

C2

FB

SW

MODE

VIN

EN

TPS6267x

CSP-6

(TOP VIEW)

MODE

C1

A2

B2

C2

A1

B1

VIN

EN

GND

FB

SW

TPS6267x

CSP-6

(BOTTOMVIEW)

GateDriver

Anti

Shoot-Through

PowerSaveMode

SwitchingLogic

+

-

Frequency

Control

FB

R1

R2

SW

GND

Soft-Start

EN

VIN

CurrentLimit

Detect

Undervoltage

Lockout

BiasSupply

Bandgap

Thermal

Shutdown

NegativeInductor

CurrentDetect

VIN

MODE

V

= 0.8 V

REF

TPS6267x

www.ti.com

SLVS952 – APRIL 2010

PIN ASSIGNMENTS

TERMINAL FUNCTIONS

TERMINAL

I/O

DESCRIPTION

NAME

NO.

FB

C1

I

Output feedback sense input. Connect FB to the converter’s output.

VIN

A2

I

Power supply input.

This is the switch pin of the converter and is connected to the drain of the internal Power

SW

B1

I/O

MOSFETs.

This is the enable pin of the device. Connecting this pin to ground forces the device into

EN

B2

I

detected the device will automatically power up. This pin must not be left floating and must be

terminated.

This is the mode selection pin of the device. This pin must not be left floating and must be

terminated.

MODE = LOW: The device is operating in regulated frequency pulse width modulation mode

MODE

A1

I

(PWM) at high-load currents and in pulse frequency modulation mode (PFM) at light load

currents.

MODE = HIGH: Low-noise mode enabled, regulated frequency PWM operation forced.

GND

C2

–

Ground pin.

FUNCTIONAL BLOCK DIAGRAM

Copyright © 2010, Texas Instruments Incorporated

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