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AP1155ADU Datasheet(PDF) 20 Page - Asahi Kasei Microsystems

Part No. AP1155ADU
Description  15V Input / 1A Output Adjustable Voltage LDO Regulator
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Maker  AKM [Asahi Kasei Microsystems]
Homepage  http://www.akm.com
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AP1155ADU Datasheet(HTML) 20 Page - Asahi Kasei Microsystems

 
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[AP1155ADU]
Rev.0.0
- 20 -
2014/07
13. Recommended External Circuits
VOut,TYP=3.0V: Example of selection of external components.
V
In
V
Cont
V
Cont
GND
FB
V
Out
R
1=53k
C
FB=0.001F
C
Out=1.0F
V
In
C
In=1.0F
R
2=36k
I
Out
Figure 5. External Circuit
The output voltage value VOut,TYP is determined using the following equation:
Fb
2
2
1
TYP
Out,
V
R
R
R
V
The minimum required current through resistance R1, R2 is 30A, which is determined by
2
Fb
R
V
.
Only a ceramic capacitor should be used for COut. For CIn any type of capacitor may be selected. For COut and
CIn, use capacitors rated at 1F or higher. For details, refer to 11.7 Stability.
The Fb terminal has high impedance and is therefore susceptible to external noise, etc. Connecting capacitor
CFb between the VOut terminal and the Fb terminal minimizes the effects of external noise and also reduces
output noise.


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