MIC4574-5.0BN(2005) 데이터 시트보기 (PDF) - Micrel

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MIC4574-5.0BN
(Rev.:2005)

200kHz Simple 0.5A Buck Regulator

Micrel 

MIC4574

Block Diagrams

Micrel, Inc.

+24V max.

VIN

CIN

Shutdown

Enable

SHDN

Internal

Regulator

200kHz

Oscillator

Thermal

Shutdown

Current

Limit

Com-

parator

Error

Amp.

MIC4574-x.x

Driver

0.5A

Switch

1.23V

Bandgap

R1

R2

GND

SW

L1

D1

FB

Block Diagram with External Components

Fixed Step-Down Regulator

VOUT

COUT

+24V max.

VIN

Shutdown

Enable

SHDN

Internal

Regulator

200kHz

Oscillator

Thermal

Shutdown

Current

Limit

Com-

parator

Error

Amp.

MIC4574 [Adjustable]

Driver

1.23V

Bandgap

0.5A

Switch

GND

CIN

VOUT

R1

VREF R2 + 1

R1 R2 VOUT 1

VREF

SW

L1

D1

VOUT

COUT

R1

FB

R2

Block Diagram with External Components

Adjustable Step-Down Regulator

M9999-062105

4

June 2005

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