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F72820 Datasheet(PDF) 11 Page - Feature Integration Technology Inc.

Part # F72820
Description  Synchronous Buck PWM DC-DC Controller
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Manufacturer  FINTEK [Feature Integration Technology Inc.]
Direct Link  http://www.fintek.com.tw/eng
Logo FINTEK - Feature Integration Technology Inc.

F72820 Datasheet(HTML) 11 Page - Feature Integration Technology Inc.

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F72820
Jul 2007
V0.24P
-8-
F72820
C
ESR
2
1
SR
tput_Cap_E
Zero_of_Ou
130kHz
Pole_of_EA
LC
2
1
_Filter
Pole_of_LC
Vout
0.8
1.8
5
34dB
in
DC_Loop_Ga
×
×
=
=
=
×
×
=
π
π
comp
Error
Amp
VREF
UGATE
LGATE
VIN
VOUT
L
C
ESR
1.75V
The F72820 Bode plot as shown Figure 9
0.1k
1k
10k
100k
1M
10
20
30
40
Pole of LC Filter
Zero of Cout ESR
Pole of EA
Cout=1000u ( ESR=30m )
Lout=4.7u
Vout=1.6V
Gain ( dB )
f ( Hz )


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