MIC2179 데이터 시트보기 (PDF) - Micrel
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MIC2179 Datasheet PDF : 13 Pages
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Micrel, Inc.
Block Diagram
UVLO,
Thermal
Shutdown
Enable
Shutdown
EN
15
3.3V
Regulator
R3
4.02k
BIAS
14
0.01µF
internal
supply Voltage
Skip Mode
PWM Mode
PWM
5
PWM/
Skip-Mode
Select
Corrective
Ramp
Stop
SYNC
200kHz
13
Oscillator
Reset
Pulse
R
Q
S
RC COMP
8
CC
MIC2179 [Adjustable]
MIC2179
Output
Control
Logic
ILIMIT
Comp.
ILIMIT
Thresh.
Voltage
VIN
4.5V to 16.5V
VIN 16 17
100µF
ISENSE
Amp.
110mΩ
P-channel
110mΩ
N-channel
VOVUOTUT = 11..224455( RRRR1221+ 1) 1
SW
L
3
PGND
1
2
19
20
D
COUT
*
* Connect
SGND to PGND
Bold lines indicate
high current traces
VOUT
Skip-Mode
Comp.
PWM
Comp.
VREF 1.245V
SGND 9 10 11 12
Power Good
Comp.
FB
7
VIN
20k
PWRGD
6
R1
R2
Output Good
1.13V
June 2009
6
M9999-063009
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