MIC2177(1999) View Datasheet(PDF) - Micrel

Part Name

Description

View to exact match

MIC2177
(Rev.:1999)

2.5A Synchronous Buck Regulator

Micrel 

MIC2177

Skip-Mode Functional Diagram

Output Control Logic

One

Shot

S

Q

R

ILIMIT

Comp.

ILIMIT

Thresh.

Voltage

VIN

4.5V to 16.5V

CIN

VIN 1 2 9

Micrel

ISENSE

Amp.

100mΩ

P-channel

VOUT

R1

1.245

R2

SW

3

L1

8

IL1

D

COUT

PGND

4

5

6

7

1

VOUT

Skip-Mode

Comp.

MIC2177 [Adjustable] Skip-Mode Signal Path

VREF 1.245V

SGND 14 15 16 17

R1

FB

12

R2

VSW

VIN

VOUT

0

One-Shot

Pulse

ILIM

IL1

0

VREF + 5mV

VFB

VREF – 5mV

MIC2177

10

April 1999

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