MIC4680

Micrel

MIC4680

2

June 2000

Ordering Information

Part Number

Voltage

Junction Temp. Range

Package

MIC4680BM

Adjustable

–40

°C to +125°C

8-lead SOP

MIC4680-3.3BM

3.3V

–40

°C to +125°C

8-lead SOP

MIC4680-5.0BM

5.0V

–40

°C to +125°C

8-lead SOP

Pin Configuration

1

SHDN

IN

SW

FB

8

GND

GND

GND

GND

7

6

5

2

3

4

SOP-8 (M)

Pin Description

Pin Number

Pin Name

Pin Function

1

SHDN

Shutdown (Input): Logic low enables regulator. Logic high (>1.6V) shuts

down regulator.

2

VIN

Supply Voltage (Input): Unregulated +4V to +34V supply voltage.

3

SW

Switch (Output): Emitter of NPN output switch. Connect to external storage

inductor and Shottky diode.

4

FB

Feedback (Input): Connect to output on fixed output voltage versions, or to

1.23V-tap of voltage-divider network for adjustable version.

5–8

GND

Ground