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AP3445 Datasheet(PDF) 2 Page - Diodes Incorporated

Part # AP3445
Description  STEP-DOWN DC-DC BUCK CONVERTER
PDF  13 Pages
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Manufacturer  DIODES [Diodes Incorporated]
Direct Link  http://www.diodes.com
Logo DIODES - Diodes Incorporated

AP3445 Datasheet(HTML) 2 Page - Diodes Incorporated

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AP3445/L
Document number: DS39755 Rev. 1 - 2
2 of 13
www.diodes.com
March 2018
© Diodes Incorporated
AP3445/L
Typical Applications Circuit
R1
R2
VIN
EN
LX
FB
L1 2.2
mH
CIN
22
mF
VIN=2.7V to 5.5V
GND
COUT
22
mFx2
VOUT=1.8V
OFF
ON
C1
22pF
200k
Ω
100k
Ω
PG
Pin Descriptions
Pin Number
Pin Name
Function
1
EN
Enable control input. Force this pin voltage above 1.5V enables the chip, and below
0.4V shuts down the device.
2
GND
Ground pin
3
LX
The drains of the internal main and synchronous power MOSFET.
4
VIN
Bias supply. Chip main power supply pin
5
PG
Power good indicator, open drain output. PG is pulled up to VIN when the output
voltage is within 20% of the regulation level, otherwise it is low
6
FB
Feedback voltage to internal error amplifier, the threshold voltage is 0.6V.



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