![](/html/Micrel/24384/page5.png)
MIC4576
Block Diagrams
+36V max.
VIN
CIN
Shutdown
Enable
SHDN
Internal
Regulator
200kHz
Oscillator
Thermal
Shutdown
Current
Limit
Com-
parator
Error
Amp.
MIC4576-x.x
Driver
3A
Switch
1.23V
Bandgap
R1
R2
GND
SW
L1
D1
FB
Block Diagram with External Components
Fixed Step-Down Regulator
VOUT
COUT
Micrel, Inc.
+36V max.
VIN
CIN
Shutdown
Enable
SHDN
Internal
Regulator
200kHz
Oscillator
Thermal
Shutdown
Current
Limit
Com-
parator
Error
Amp.
MIC4576 [Adjustable]
Driver
1.23V
Bandgap
3A
Switch
SW
L1
D1
R1
FB
R2
GND
VOUT
COUT
Block Diagram with External Components
Adjustable Step-Down Regulator
March 2006
5
MIC4576