LTC4085-3/LTC4085-4
TYPICAL APPLICATION
USB Power Control Application with Wall Adapter Input
5V WALL
ADAPTER
INPUT
5V (NOM)
FROM USB
CABLE VBUS
4.7μF
1Ω*
4.7μF
1Ω*
1k 510Ω 510Ω
4.7μF
IN
CHRG
ACPR
WALL
LTC4085-3/
LTC4085-4
OUT
GATE
BAT
VNTC
SUSPEND USB POWER
500mA/100mA SELECT
*SERIES 1Ω RESISTOR ONLY
NEEDED FOR INDUCTIVE
INPUT SUPPLIES
NTC
SUSP
HPWR
PROG
CLPROG
TIMER
GND
RPROG
71.5k
RCLPROG
2.1k
TO LDOs
REGs, ETC
+
RNTCBIAS
10k
Li-Ion
CELL
RNTC
10k
0.15μF
408534 TA02
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
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Package
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LTC4089-5
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Charger
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Adaptive Output Control (LTC4089/-1); Fixed 5V Output (LTC4089-5) “-1” for
4.1V Float Voltage Batteries
LTC4090
High Voltage USB Power Manager with Ideal
High Efficiency 1.2A Charger from 6V to 36V (60V max) Input Charges Single
Diode Controller and High Efficiency Li-Ion Battery Cell Li-Ion Batteries Directly from a USB Port, Thermal Regulation; 200mΩ
Charger
Ideal Diode with <50mΩ option, 3mm × 4mm DFN-14 Package, Bat-Track
Adaptive Output Control
LTC4411/LTC4412 Low Loss PowerPath Controller in ThinSOT
Automatic Switching Between DC Sources, Load Sharing,
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408534fb
24 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
LT 0512 REV B • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2011