MIC4575 Datasheet, PDF (4/12 Pages) Micrel Semiconductor – 200kHz Simple 1A Buck Voltage Regulator

MIC4575
Block Diagrams
+24V max.
V_IN
C_IN
Shutdown
Enable
SHDN
Internal
Regulator
200kHz
Oscillator
Thermal
Shutdown
Current
Limit
Com-
parator
Error
Amp.
MIC4575-x.x
Driver
1A
Switch
1.23V
Bandgap
R1
R2
GND
SW
L1
D1
FB
Block Diagram with External Components
Fixed Step-Down Regulator
V_OUT
C_OUT
+24V max.
V_IN
Shutdown
Enable
SHDN
Internal
Regulator
200kHz
Oscillator
Thermal
Shutdown
Current
Limit
Com-
parator
Error
Amp.
MIC4575 [Adjustable]
Driver
1.23V
Bandgap
1A
Switch
GND
C_IN
V_OUT
R1
V_{REF R2} + 1
R1 R2 ^VOUT 1
V_REF
SW
L1
D1
V_OUT
C_OUT
R1
FB
R2
Block Diagram with External Components
Adjustable Step-Down Regulator
April 1998•
4-109
Micrel
4