LTC3556_15 Datasheet, PDF (36/36 Pages) Linear Technology – High Effi ciency USB Power Manager with Dual Buck and Buck-Boost DC/DCs

LTC3556
TYPICAL APPLICATION
Pushbutton Start with Automatic Sequencing, Reverse Input Voltage Protection and 10 Second Push and Hold Hard Shutdown
USB
MP1
CONNECTOR
4.7k
MN1
1k
1M
10μF
10k
25
V_BUS
10μF
10
DV_CC
V_OUT3 ¹²
V_C3
FB3
8
7
SWCD3 ¹⁴
0.1μF
SWAB3 ⁹
PGOODALL ¹⁵
1
LDO3V3
1μF
SW1 ⁴
LTC3556
6
FB1
28
ENALL
27
SEQ
I²C (SCL, SDA) ^13,16
10μF
SW2 ¹⁹
29 _GND
FB2 ¹⁷
MN1: 2N7002
MP1: SILICONIX Si2333DS
MEMORY
CORE
SDA
2
SCL
I/O
SEND I²C CODE: “0x12FF1C”
ONCE POWER IS DETECTED
3556 TA03
RELATED PARTS
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^TM 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
LTC3555/
LTC3555-1
High Efficiency USB Power Manager Plus Maximizes Available Power from USB Port, Bat-Track, “Instant On” Operation, 1.5A Max
Triple Step-Down DC/DC
Charge Current, 180mΩ Ideal Diode with <50mΩ Option, 3.3V/25mA Always-On LDO,
Three Synchronous Buck Regulators (400mA/400mA/1A), 4mm × 5mm QFN28 Package
LTC3557/
LTC3557-1
Linear USB Power Manager with Li-Ion/
Polymer Charger and Triple Synchronous
Buck Converter
Complete Multifunction ASSP: Linear Power Manager and Three Buck Regulators
Charge Current Programmable up to 1.5A from Wall Adapter Input, Thermal Regulation,
Synchronous Buck Efficiency: >95%, ADJ Outputs: 0.8V to 3.6V at 400mA/400mA/600mA
Bat-Track Adaptive Output Control, 200mΩ Ideal Diode, 4mm × 4mm QFN28 Package
LTC4085
Linear 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
High Efficiency USB Power Manager and Maximizes Available Power from USB Port, Bat-Track, “Instant On” Operation, 1.5A Max
Battery Charger
Charge Current, 180mΩ Ideal Diode with <50mΩ Option, 3.3V/25mA Always-On LDO,
4mm × 3mm DFN14 Package
Hot Swap is a trademark of Linear Technology Corporation.
3556f
36 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
LT 0208 • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2008