MIC4575 Micrel Semiconductor, MIC4575 Datasheet - Page 4

• Manufacturer Part Number: MIC4575
• Description: 200kHz Simple 1A Buck Voltage Regulator
• Manufacturer: Micrel Semiconductor

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