Data Sheet

© 2012 Fairchild Semiconductor Corporation www.fairchildsemi.com
FPF3040 • Rev. 2.4.3 2
FPF3040 — IntelliMAX™ 18 V-Rated Dual Input Single Output Power-Source-Selector Switch
Application Diagram
C
OUT
FPF3040
V
IN
V
OUT
V
BUS
C
IN1
C
IN2
OFF
V
IN_ SEL
DF_IN
Other_V
IN_ AVA
V
I/O
V
IN
V
BUS
V
OUT
ON
GND
EN
GND
V
OUT
V
OUT
V
IN
V
BUS
Figure 1. Typical Application
FPF3040
EN
R1
20 kΩ
R2
30 kΩ
1.8V GPIO
Charger
5V charging voltage at VOUT creates 3V at EN when
Q1 gate is LOW (OFF)
Note:
Q1 gate should be HIGH (ON) when not in OTG mode.
VOUT
Q1
Figure 2. Example Circuit for OTG Operation with Low-Voltage GPIO