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FP6795 Datasheet(PDF) 2 Page - Fitipower Integrated Technology Inc.

No. de pieza FP6795
Descripción Electrónicos  Low-Noise Boost DC-DC Converter
PDF  9 Pages
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Fabricante Electrónico  FITIPOWER [Fitipower Integrated Technology Inc.]
Página de inicio  http://www.fitipower.com/en_US/index.asp
Logo FITIPOWER - Fitipower Integrated Technology Inc.

FP6795 Datasheet(HTML) 2 Page - Fitipower Integrated Technology Inc.

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FP6795-1.5-FEB-2012
2
FP6795
09A
85T
fitipower integrated technology lnc.
Typical Application Circuit
FB
COMP
GND
SS
LX
IN
FREQ
SHDN
FP6795
VIN
ON/OFF
VIN
VOUT
1
2
3
5
4
7
8
6
C5
0.1µF
L1
4.7µH
C1
22µF
C3
0.033µF
R3
120K
C4
1000pF
C6
47pF
R2
43K
R1
390K
D1
C2
10µF
C7
0.1µF
C8
22µF
3.3V
Figure 2. Typical Application Circuit of FP6795
VIN (V)
VOUT (V)
fOSC (kHz)
L (µH)
COUT (µF)
R3 (k
Ω)
C4 (pF)
C6 (pF)
IOUT(MAX) (mA)
3.3
12.5
640
10 (TDK SLF7045)
33 (Ceramic)
120
1000
47
300
3.3
12.5
1200
6.8 (TDK SLF7045)
33 (Ceramic)
200
680
33
300
Functional Pin Description
Pin Name
Pin Function
COMP
Compensation Pin for Error Amplifier.
Connect a series RC from COMP to ground.
FB
Feedback Pin.
The typical reference voltage is 1.24V.
Set VOUT = 1.24V (1+ R1/R2).
See Figure 2.
Enable Pin.
Connect
SHDN low to turn off FP6795.
GND
Ground.
LX
Switching Pin.
IN
Power Input Pin.
FREQ
Frequency Select Pin.
When FREQ is connected to ground, the frequency is 640kHz.
When FREQ is
connected to VIN, the frequency is 1.2MHz.
SS
Soft-Start Control Pin.
Connect a capacitor (C3) to this pin.
The pin will source 4
μA constant current to charge
the capacitor.
Leave this pin floating for not using soft-start.



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