MIC2177(1999) 查看數據表（PDF） - Micrel

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产品描述 (功能)

比赛名单

MIC2177
(Rev.:1999)

2.5A Synchronous Buck Regulator

Micrel 

MIC2177

Block Diagram

Micrel

VIN

4.5V to 16.5V

CIN

VIN 1 2 9

UVLO,

Thermal

Shutdown

Enable

Shutdown

EN

20

BIAS

19

0.01µF

3.3V

Regulator

internal

supply

voltage

SYNC

18

200kHz

Oscillator

Auto-Mode

AUTO

PWM

11

2.2nF

COMP

13

RC

CC

MIC2177 [Adjustable]

Output

Control

Logic

ILIMIT

Comp.

PWM/

Skip-Mode

Select Logic

IMIN

Comp.

CORRECTIVE RAMP

3.3V

10µA

RESET PULSE

R

Q

S

PWM

Comp.

ISENSE

Amp.

100mΩ

P-channel

100mΩ

N-channel

IMIN

Thrshld.

Low Output

Comp.

Skip-Mode

Comp.

40mV

VOUT

R1

1.245

R2

SW

3

L1

8

1

VOUT

D

PGND

4

5

6

7

COUT

Bold lines indicate

high current traces

OUT

10

R1

FB

12

R2

Error

Amp.

VREF

1.245V

SGND 14 15 16 17

MIC2177

6

April 1999

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