MIC4574_05 Datasheet, PDF (2/7 Pages) Micrel Semiconductor – 200kHz Simple 0.5A Buck Regulator

MIC4574
Ordering Information
Part Number
Standard
Pb-Free
MIC4574-3.3BN MIC4574-3.3YN
MIC4574-5.0BN MIC4574-5.0YN
MIC4574BN
MIC4574YN
Voltage
3.3V
5.0V
Adjustable
Temperature
Range
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
Package
8-pin DIP
8-pin DIP
8-pin DIP
Micrel, Inc.
Pin Configuration
FB 1
SGND 2
SHDN 3
PGND 4
8 NC
7 SW
6 NC
5 V_IN
8-Pin DIP (N)
Pin Description
Pin Number
1
2
3
4
5
7
6, 8
Pin Name
FB
SGND
SHDN
PGND
VIN
SW
NC
Pin Function
Feedback (Input): Output voltage feedback to regulator. Connect to output
of supply for fixed versions. Connect to 1.23V tap of resistive divider for
adjustable versions.
Signal Ground.
Shutdown (Input): Logic low enables regulator. Logic high (> 2.4V) shuts
down regulator.
Power Ground.
Supply Voltage (Input): Unregulated +4V to +24V supply voltage.
Switch (Output): Emitter of NPN output switch. Connect to external storage
inductor and Shottky diode.
Not internally connected. Solder to printed circuit for maximum heat transfer.
M9999-062105
2
June 2005