LTC4055EUF#PBF Linear Technology, LTC4055EUF#PBF Datasheet - Page 22

• Manufacturer Part Number: LTC4055EUF#PBF
• Description: IC USB PWR MNGR BATT CHRGR 16QFN
• Manufacturer: Linear Technology

Specifications of LTC4055EUF#PBF

• Function: Charge Management
• Battery Type: Lithium-Ion (Li-Ion)
• Voltage - Supply: 4.35 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-WQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

USB Hosting Application: The LTC4055/LTC4055-1’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
confi gured to turn off its input power path, IN1 and IN2.
LTC4055/LTC4055-1
TYPICAL APPLICATIONS
22
ADAPTER INPUT
CABLE V
FROM USB
5V (NOM)
5V WALL
BUS
BUS
the LTC4055/LTC4055-1 can be
CONTROLLER
USB
1μF
R3
100k
R1
34.8k
R2
10k
NTC
100k
Figure 6. USB Hosting Application
C
TIMER
0.1μF
IN1
IN2
WALL
SUSP
V
NTC
TIMER PROG
NTC
V
OUT
CONVERTER
R
100k
LTC4055
PROG
DC/DC
EN
CLPROG
Forcing the SUSP input pin above 1.2V does this. Figure 6
shows the application circuit. The wall adapter or the battery
can still provide power to OUT, which in turn can provide
power to V
The ability to charge the battery is enabled when the wall
adapter is present.
R
105k
CLPROG
V
IN
HPWR
CHRG
SHDN
ACPR
GND
OUT
BAT
4055 F06
BUS
+
when commanded from the USB controller.
Li-Ion
CELL
10μF
500mA/100mA SELECT
SHUTDOWN
TO LDOs,
REGs, ETC
4055fb