MIC2171_07 Datasheet, PDF (2/12 Pages) Micrel Semiconductor – 100kHz 2.5A Switching Regulator

Micrel, Inc.
Ordering Information
Part Number
Standard
RoHS Compliant*
Temperature Range
MIC2171BT
MIC2171WT
–40° to +85°C
MIC2171BU
MIC2171WU
–40° to +85°C
*RoHS compliant with "high-melting solder" exemption.
Package
5-Pin TO-220
5-Pin TO-263
MIC2171
Pin Configuration
Tab GND
5 IN
4 SW
3 GND
2 FB
1 COMP
5-Pin TO-220 (T)
Tab GND
5 IN
4 SW
3 GND
2 FB
1 COMP
5-Pin TO-263 (U)
Pin Description
Pin Number
1
2
3
4
5
Pin Name
COMP
FB
GND
SW
IN
Pin Function
Frequency Compensation: Output of transconductance-type error amplifier.
Primary function is for loop stabilization. Can also be used for output voltage
soft-start and current limit tailoring.
Feedback: Inverting input of error amplifier. Connect to external resistive divider
to set power supply output voltage.
Ground: Connect directly to the input filter capacitor for proper operation (see
applications info).
Power Switch Collector: Collector of NPN switch. Connect to external inductor
or input voltage depending on circuit topology.
Supply Voltage: 3.0V to 40V
May 2007
2
M9999-051107