LTC4055 Linear Technology, LTC4055 Datasheet - Page 22

• Manufacturer Part Number: LTC4055
• Description: USB Power Controller and Li-Ion Linear Charger
• Manufacturer: Linear Technology

LTC4055
USB Hosting Application: The LTC4055’s IN1 and IN2
are Set Hi-Z by Pulling the SUSP Pin Above 1.2V
In applications where the power is required to go back out
on to the USB V
off its input power path, IN1 and IN2. Forcing the SUSP
input pin above 1.2V does this. Figure 6 shows the
TYPICAL APPLICATIO S
22
ADAPTER INPUT
BUS
CABLE V
FROM USB
5V (NOM)
5V WALL
the LTC4055 can be configured to turn
BUS
CONTROLLER
USB
1 F
U
R3
100k
R1
34.8k
R2
10k
NTC
100k
C
Figure 6. USB Hosting Application
TIMER
0.1 F
IN1
IN2
WALL
SUSP
V
NTC
TIMER PROG
NTC
V
OUT
CONVERTER
R
105k
LTC4055
PROG
DC/DC
EN
CLPROG
application circuit. The wall adapter or the battery can still
provide power to OUT, which in turn can provide power to
V
ability to charge the battery is enabled when the wall
adapter is present.
R
105k
BUS
CLPROG
V
IN
HPWR
CHRG
SHDN
ACPR
when commanded from the USB controller. The
GND
OUT
BAT
4055 F06
+
Li-Ion
CELL
10 F
500mA/100mA SELECT
SHUTDOWN
TO LDOs,
REGs, ETC
4055p