MIC4680_08 MICREL [Micrel Semiconductor], MIC4680_08 Datasheet - Page 8

• Manufacturer Part Number: MIC4680_08
• Description: 1A 200kHz SuperSwitcher Buck Regulator
• Manufacturer: MICREL [Micrel Semiconductor]

Functional Diagrams
Micrel, Inc.
March 2008
SHDN
SHDN
MIC4680 [adj.]
MIC4680-x.x
Oscillator
200kHz
Oscillator
200kHz
parator
Com-
parator
Adjustable Regulator
Com-
Error
Amp
Fixed Regulator
Error
Amp
Shutdown
Regulator
Thermal
Internal
Reset
Shutdown
Regulator
Thermal
Internal
Reset
8
GND
1.23V
Bandgap
Reference
1.23V
Bandgap
Reference
Current
Driver
Limit
Current
Driver
Limit
Switch
IN
1A
Switch
V
IN
1A
IN
V
IN
SW
FB
SW
FB
R1 R2
V
V
REF
OUT
=
=
=
1.23V
V
⎛
⎜
⎝
REF
V
V
OUT
REF
⎛
⎜
⎝
R2
R1
-
1
⎞
⎟
⎠
+
1
⎞
⎟
⎠
R1
R2
M9999-032808
V
C
MIC4680
OUT
OUT
V
C
OUT
OUT