SC2544 Ver la hoja de datos (PDF) - Semtech Corporation

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SC2544

High Performance Wide Input Range Dual Synchronous Buck Controller

Semtech Corporation 

SC2544

POWER MANAGEMENT

Block Diagram (One PWM channel shown)

ROSC

Oscillator

Ramp

generator

Ramp1

CLK1

+

PWM

-

ERROUT1

FB1

SS1

VCC

VIN

FB1

+

OUT

-

3R

0.75V

-

E/A

OUT

+

R

0.75V

+

-

OUT

UVLO

VCC

ENABLE

EN

AGND

ON/OFF

VCC

UVLO

Band

10V

Gap 1

LDO

S

Q

R

PVCC

Protect 1

PHASE1

PVCC

Protect 1

BST1

DRVH1

PHASE1

PVCC

DRVL1

R

S

/Q Protect 1

-

OCP

OUT

+

+ FB1

OVP OUT

-

0.89V

0.75V

Band

Gap 2

0.75V 0.675V

+

FB1

-

OUT

OVP

FB2

-

VCC

10u A

ILIM1

PWRGD

OCP

 2005 Semtech Corp.

7

www.semtech.com

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