GND

A1

B1

C1

A2

B2

C2

FB

SW

MODE

VIN

EN

TPS62660

CSP-6

(TOP VIEW)

MODE

C1

A2

B2

C2

A1

B1

VIN

EN

GND

FB

SW

TPS62660

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

TPS6266x

SLVS871A – FEBRUARY 2010 – REVISED MARCH 2010

www.ti.com

PIN ASSIGNMENTS

PIN FUNCTIONS

PIN

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.

SW

B1

I/O

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

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

EN

B2

I

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 (PWM) at high-load

MODE

A1

I

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

4

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Product Folder Link(s): TPS6266x