MIC4681
Micrel
Ordering Information
Part Number
MIC4681BM
Voltage
Adjustable
Junction Temp. Range
–40°C to +125°C
Package
8-lead SOP
Pin Configuration
SHDN 1
VIN 2
SW 3
FB 4
8 GND
7 GND
6 GND
5 GND
SOP-8 (M)
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 (>2V) shuts down
regulator.
Supply Voltage (Input): Unregulated +4V to +30V supply voltage.
Switch (Output): Emitter of NPN output switch. Connect to external storage
inductor and Shottky diode.
Feedback (Input): Connect to 1.23V-tap of voltage-divider network
Ground
MIC4681
2
February 2001