LTC4055EUF#TRPBF Linear Technology, LTC4055EUF#TRPBF Datasheet - Page 21

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

Specifications of LTC4055EUF#TRPBF

• 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

LTC4055/LTC4055-1 Confi gured for USB Application
with Wall Adapter
Figure 5 shows an LTC4055/LTC4055-1 confi gured for
USB applications with the optional wall adapter input. The
programming resistor (R
up a nominal current limit of 467mA in high power mode
(92mA in low power). This is done to prevent the various
tolerances in the part and programming resistors from
TYPICAL APPLICATIONS
ADAPTER INPUT
CABLE V
FROM USB
5V (NOM)
5V WALL
BUS
CLPROG
R3
1Ω
10μF
Figure 5. USB Power Control Application with Wall Adapter Input
) is set to 105k which sets
R1
34.8k
R2
10k
R
100k
NTC
100k
NTCBIAS
C
TIMER
0.1μF
IN1
IN2
CHRG
ACPR
WALL
V
NTC
TIMER PROG
NTC
R
60.4k
LTC4055
PROG
CLPROG
allowing the input current supplied by V
500mA/100mA limits.
The programming resistor (R
sets up a nominal charge current of approximately 800mA.
Note that this is the charge current when the wall adapter
is present. When the wall adapter is absent, the current
limit supersedes the charge current programming and
charge current is limited to 467mA.
R
105k
CLPROG
HPWR
SHDN
SUSP
GND
OUT
BAT
4055 F05
+
Li-Ion
CELL
SUSPEND USB POWER
500mA/100mA SELECT
SHUTDOWN
LTC4055/LTC4055-1
10μF
TO LDOs,
REGs, ETC
PROG
) with a value of 60.4k
BUS
to exceed the
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4055fb