LTC3555/LTC3555-X
34
3555fe
For more information www.linear.com/LTC3555
LINEAR TECHNOLOGY CORPORATION 2007
LT 1116 REV E • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com/LTC3555
PART NUMBER DESCRIPTION COMMENTS
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 Output for SDIO and Memory Cards. 24-Lead 4mm × 4mm QFN 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%. 24-Lead
4mm × 4mm QFN Package
LTC3552 Standalone Linear Li-Ion Battery
Charger with Adjustable Output
Dual Synchronous Buck Converter
Synchronous Buck Converter, Efficiency: >90%, Adjustable Outputs at 800mA and 400mA,
Charge Current Programmable up to 950mA, USB Compatible, 16-Lead 5mm × 3mm DFN
Package
LTC3557/LTC3557-1 USB Power Manager with
Li-Ion/Polymer Charger, Triple
Synchronous Buck Converter plus
LDO
Complete Multi Function PMIC: Linear Power Manager and Three Buck Regulators Charge
Current Programmable up to 1.5A from Wall Adapter Input, Thermal Regulation Synchronous
Buck Converters Efficiency: >95%, ADJ Outputs: 0.8V to 3.6V at 400mA/400mA/600mA Bat-
Track™ Adaptive Output Control, 200mΩ Ideal Diode, 4mm × 4mm QFN-28 Package.
LTC4085 USB Power Manager with Ideal
Diode Controller and Li-Ion Charger
Charges Single Cell Li-Ion Batteries Directly from a USB Port, Thermal Regulation, 200mΩ
Ideal Diode with <50mΩ option, 4mm × 3mm DFN14 Package
LTC4088/LTC4088-1/
LTC4088-2
High Efficiency USB Power Manager
and Battery Charger
Maximizes Available Power from USB Port, Bat-Track, “Instant On” Operation, 1.5A Max
Charge Current, 180mΩ Ideal Diode with <50mΩ Option, 3.3V/25mA Always-On LDO,
4mm × 3mm DFN14 Package
TYPICAL APPLICATION
Push Button Start with Automatic Sequencing, Reverse Input Voltage Protection and 10 Second Push and Hold Hard Shutdown
1725
8
MP1
USB
CONNECTOR
SW1
19
FB1
15
RST3
7
EN2
12
SW3
V
BUS
LTC3555/
LTC3555-X
DV
CC
1
LDO3V3
13
1M
MN1
EN3
28
ILIM1
MN1: 2N7002
MP1: SILICONIX Si2333DS
27
ILIM0
0.1µF
14
FB3
9,10
I
2
C
1µF
1k4.7k
10k
10µF
16
EN1
6
2
SW2
4
3555 TA03
FB2
10µF
MEMORY
CORE
I/O
SCL
SDA
SEND I
2
C CODE: “0x12FF04”
ONCE POWER IS DETECTED
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