SC2542EVB データシートの表示（PDF） - Semtech Corporation

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SC2542EVB

High Performance Wide Input Range Dual Synchronous Buck Controller

Semtech Corporation 

POWER MANAGEMENT

Block Diagram (Only Channel-1 shown)

SC2542

ROSC

Oscillator

Ramp

generator

Ramp1

CLK1

ERROUT1

FB1

FB1

VCC

85uA

0.75V

+

OUT

-

SS1

3R

R

+

PWM

-

S

Q

R

E/A

-

OUT

+

0.65V

+

OUT

-

UVLO

VCC

VIN

5VSBY

15uA

VCC

ENABLE

EN

ON/OFF

5V

VCC

LDO

STBY STBY

UVLO

AGND

Band

10V

Gap 1

LDO

Minumin

Pulse

Generator

PVCC

Protect 1

PHASE1

PVCC

Protect 1

BST1

DRVH1

PHASE1

PVCC

DRVL1

MINSET1

Skip

Mode

dector

R

Protect 1

S /Q

-

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.

8

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