APW7075 データシートの表示（PDF） - Anpec Electronics
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APW7075 Datasheet PDF : 23 Pages
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APW7075
Pin Function Description
VIN (Pin 1)
LBO (pin 5)
Input supply voltage for dual-mode application. Con-
nect a schokkty diode (current rating >500mA) to USB
port or 5V adapter. If the LDO mode is not used, tie
the VIN pin to ground.
FB (pin 2)
Internal 1.2V reference voltage. Connect to OUT for 3.
3V output,. Connect to GND for 2.5V output. Use a
resistor divider to set the output voltage from 2.5V to
5.5V.
SHDN (pin 3)
Shutdown input. High = operating mode; Low = shut-
down mode.
LBI (Pin 4)
Low-battery comparator input. Internally set to trip at
0.6V.
Open-drain low battery comparator output. Connect
LBO to OUT through a 100KΩ resistor. Output is low
as VLBI < 0.6V. Open-drain device is turned on during
shutdown.
OUT (pin 8)
Power output. OUT provides bootstrap power to the
IC.
GND (Pin 6)
Ground pins of the circuitry and all ground pins must
be soldered to PCB with proper power dissipation.
LX (pin 7)
N-channel and P-channel power MOSFET drain
connection.
Application Schematic
VBAT
C1
1N5817
10uF
L1
22UH
Adapter
C3
R6
5V 10uF
ON
OFF
R3
R4
VOUT 3.3V
1
VIN
2
FB
3
SHDN
4
LBI
OUT
LX
GND
LBO
8
7
C4
1uF
6
5
R5
100kΩ
C2
100uF
APW7075
Low Battery Output
Copyright © ANPEC Electronics Corp.
Rev. A.5 - Aug., 2005
Connect the R6=500Ω to 1kΩ to GND
Figure 1. Dual Model : 3.3V Output Voltage
5
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