LTC3558_15 Datasheet, PDF (32/32 Pages) Linear Technology – Linear USB Battery Charger with Buck and Buck-Boost Regulators

LTC3558
TYPICAL APPLICATIONS
5V WALL
ADAPTER
100k
1μF
510Ω
100k (NTC)
887Ω
DIGITAL
CONTROL
UP TO 950mA
V_CC
BAT
PV_IN1
NTC
PV_IN2
LTC3558
SW1
4.7μH
CHRG
PROG
SUSP
HPWR
MODE
EN1
FB1
SWAB2
SWCD2
V_OUT2
EN2
FB2
GND2
(EXPOSED
GND PAD)
V_C2
2.2μH
324k
105k
10μF
324k
649k
+ ^SINGLE
Li-lon CELL
(2.7V TO 4.2V)
1.2V AT 400mA
10pF
10μF
3.3V AT 400mA
121k
33pF
15k
330pF
22μF
10pF
Figure 13. Battery Charger Can Charge a Battery with Up to 950mA When Powered From a Wall Adapter
RELATED PARTS
PART NUMBER DESCRIPTION
COMMENTS
LTC3550
Dual Input USB/AC Adapter Li-Ion Battery Synchronous Buck Converter, Efficiency: 93%, Adjustable Output at 600mA, Charge Current:
Charger with Adjustable Output 600mA 950mA Programmable, USB Compatible, Automatic Input Power Detection
Buck Converter
and Selection
LTC3552
Standalone Linear Li-Ion Battery Charger Synchronous Buck Converter, Efficiency: >90%, Adjustable Outputs at 800mA and
with Adjustable Output Dual Synchronous 400mA, Charge Current Programmable Up to 950mA, USB Compatible, 5mm × 3mm
Buck Converter
DFN-16 Package
LTC3552-1
Standalone Linear Li-Ion Battery Charger Synchronous Buck Converter, Efficiency: >90%, Outputs 1.8V at 800mA and 1.575 at
with Dual Synchronous Buck Converter 400mA, Charge Current Programmable up to 950mA, USB Compatible
LTC3455
Dual DC/DC Converter with USB Power
Manager and Li-Ion Battery Charger
Seamless Transition Between Input Power Sources: Li-Ion Battery, USB and 5V Wall
Adapter, Two High Efficiency DC/DC Converters: Up to 96%, Full Featured Li-Ion Battery
Charger with Accurate USB Current Limiting (500mA/100mA) Pin-Selectable Burst Mode
Operation, Hot Swap^TM Output for SDIO and Memory Cards, 4mm × 4mm QFN-24 Package
LTC3456
2-Cell, Multi-Output DC/DC Converter with
USB Power Manager
Seamless Transition Between 2-Cell Battery, USB and AC Wall Adapter Input Power Sources,
Main Output: Fixed 3.3V Output, Core Output: Adjustable from 0.8V to V_BATT(MIN), Hot Swap
Output for Memory Cards, Power Supply Sequencing: Main and Hot Swap Accurate USB
Current Limiting, High Frequency Operation: 1MHz, High Efficiency: Up to 92%, 4mm ×
4mm QFN-24 Package
LTC3559
USB Charger with Dual Buck Regulators
Adjustable, Synchronous Buck Converters, Efficiency >90%, Outputs: Down to 0.8V at
400mA Each, Charge Current Programmable Up to 950mA, USB-Compatible, 3mm × 3mm
QFN-16 Package
LTC4080
500mA Standalone Charger with 300mA Charges Single-Cell Li-Ion Batteries, Timer Termination + C/10, Thermal Regulation, Buck
Synchronous Buck
Output: 0.8V to V_BAT, Buck Input V_IN: 2.7V to 5.5V, 3mm × 3mm DFN-10 Package
Hot Swap is a trademark of Linear Technology Corporation.
32 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
3558f
LT 0408 • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2008