MIC2179(1998) 데이터 시트보기 (PDF) - Micrel

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MIC2179
(Rev.:1998)

1.5A Synchronous Buck Regulator

Micrel 

MIC2179

PWM-Mode Functional Diagram

VIN

4.5V to 16.5V

Micrel

CIN

VIN 16 17

ISENSE

Amp.

110mΩ

P-channel

110mΩ

N-channel

Stop

SYNC

13

200kHz

Oscillator

Corrective

Ramp

Reset

Pulse

COMP

CC

RC 8

R

Q

S

PWM

Comp.

Error

Amp.

VREF 1.245V

MIC2179 [Adjustable] PWM-Mode Signal Path

SGND 9 10 11 12

R1

VOUT

1.245

R2

1

SW

3

PGND

1

2

19

20

L1

IL1

D

COUT

VOUT

R1

FB

7

R2

VSW

Reset

Pulse

ILOAD

IL1

∆IL1

Error Amp.

Output

ISENSE

June 1998

9

MIC2179

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