MIC2179(1998) View Datasheet(PDF) - Micrel

Part Name

Description

View to exact match

MIC2179
(Rev.:1998)

1.5A Synchronous Buck Regulator

Micrel 

MIC2179

Skip-Mode Functional Diagram

Output Control Logic

One

Shot

S

Q

R

ILIMIT

Comp.

ILIMIT

Thresh.

Voltage

Micrel

VIN

4.5V to 16.5V

CIN

VIN 16 17

ISENSE

Amp.

110mΩ

P-channel

R1

VOUT

1.245

R2

1

SW

3

PGND

1

2

19

20

L1

IL1

D

COUT

VOUT

Skip-Mode

Comp.

MIC2179 [Adjustable] Skip-Mode Signal Path

VREF 1.245V

SGND 9 10 11 12

R1

FB

7

R2

VSW

VIN

VOUT

0

One-Shot

Pulse

ILIM

IL1

0

VREF + 5mV

VFB

VREF – 5mV

MIC2179

10

June 1998

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