LTC3550-1_15 Datasheet, PDF (24/24 Pages) Linear Technology – Dual Input USB/AC Adapter Li-Ion Battery Charger with 600mA Buck Converter

LTC3550-1
TYPICAL APPLICATIO S
Dual Input Charger Plus Step-Down Converter with Wall Adapter PowerPath^™
USB
POWER
LTC3550-1
DCIN
1µF
USBIN
V_CC
1µF
4.7µF
IUSB
BAT
IDC
SW
2.1k
1%
1.24k
ITERM
V_OUT
1%
1k
GND
1%
2.2µH
WALL ADAPTER
1k
800mA (WALL)
475mA (USB)
10µF
CER
V_OUT
1.875V
600mA
+
4.2V
SINGLE-CELL
Li-Ion BATTERY
3550-1 TA04
RELATED PARTS
PART NUMBER DESCRIPTION
COMMENTS
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LTC4076
Dual Input Standalone Li-Ion Battery
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Charges Single-Cell Li-Ion Batteries from Wall Adapter and USB Inputs with Automatic
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LTC4077
Dual Input Standalone Li-Ion Battery
Charger
Charges Single-Cell Li-Ion Batteries from Wall Adapter and USB Inputs with
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Regulation, Programmable USB Low Power Mode, C/10 Charge Termination,
3mm × 3mm DFN Package
PowerPath and ThinSOT are trademarks of Linear Technology Corporation.
24 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
35501f
LT 1205 • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2005