95% Duty

Cycle Limit

OSC

FSLCT

DC

LIMIT

SET

+

+

-

+

PWM

Comp

RESET

-

+

OVP

Comp

Buck

Driver

BUCK

DRIVE

+

-

Error

Amp

BG

FB1

Bandgap

Soft

Start

Thermal

Shutdown

VBG

VC1

OVP

TSH

SHDN1

SD

Buck Load

Current

Measurement

Fixed Buck Converter

CB1

SS1

SW1

VIN

PGND

95% Duty

Cycle Limit

OSC

FSLCT

DC

LIMIT

SET

+

+

-

+

PWM

Comp

RESET

-

+

OVP

Comp

Buck

Driver

BUCK

DRIVE

+

-

Error

Amp

BG

FB2

Bandgap

Soft

Start

Thermal

Shutdown

VBG

VC2

OVP

TSH

SHDN2

SD

Buck Load

Current

Measurement

Adjustable Buck Converter

CB2

SS2

SW2

VIN

PGND

36.5k

20.38k

LM2717

www.ti.com

SNVS253D – MAY 2005 – REVISED MARCH 2013

Block Diagram

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

Copyright © 2005–2013, Texas Instruments Incorporated

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