Micrel, Inc.
MIC4680
Ordering Information
Part Number
Standard
MIC4680BM
MIC4680-3.3BM
MIC4680-5.0BM
Pb-Free
MIC4680YM
MIC4680-3.3YM
MIC4680-5.0YM
Voltage
Adj.
3.3V
5.0V
Junction Temp. Range
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
Package
8-Pin SOIC
8-Pin SOIC
8-Pin SOIC
Pin Configuration
SHDN 1
IN 2
SW 3
FB 4
8-Pin SIOC (M)
8 GND
7 GND
6 GND
5 GND
Pin Description
Pin Number
1
2
3
4
5–8
Pin Name
SHDN
VIN
SW
FB
GND
Pin Function
Shutdown (Input): Logic low enables regulator. Logic high (>1.6V) shuts down
regulator.
Supply Voltage (Input): Unregulated +4V to +34V supply voltage.
Switch (Output): Emitter of NPN output switch. Connect to external storage inductor
and Shottky diode.
Feedback (Input): Connect to output on fixed output voltage versions, or to 1.23V-tap
of voltage-divider network for adjustable version.
Ground
March 2008
2
M9999-032808
MICREL [ MICREL SEMICONDUCTOR ]
