LTC3555 Linear Technology, LTC3555 Datasheet - Page 32

• Manufacturer Part Number: LTC3555
• Description: High Efficiency USB Power Manager + Triple Step-Down DC/DC
• Manufacturer: Linear Technology

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TYPICAL APPLICATION
RELATED PARTS
LTC3555
PART NUMBER
LTC3455
LTC3456
LTC3552
LTC4085
LTC4088/LTC4088-1 High Effi ciency USB Power Manager
Hot Swap is a trademark of Linear Technology Corporation.
32
Push Button Start with Automatic Sequencing, Reverse Input Voltage Protection and 10 Second Push and Hold Hard Shutdown
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
CONNECTOR
DESCRIPTION
Dual DC/DC Converter with USB
Power Manager and Li-Ion Battery
Charger
2-Cell, Multi-Output DC/DC
Converter with USB Power
Manager
Standalone Linear Li-Ion Battery
Charger with Adjustable Output Dual
Synchronous Buck Converter
USB Power Manager with Ideal
Diode Controller and Li-Ion Charger
and Battery Charger
4.7k
MN1
USB
●
FAX: [phone]
MN1: 2N7002
MP1: SILICONIX Si2333DS
1M
10μF
MP1
1k
10k
●
www.linear.com
0.1μF
1μF
10μF
25
13
27
28
8
1
V
DV
LDO3V3
EN3
ILIM0
ILIM1
COMMENTS
Seamless Transition Between Input Power Sources: Li-Ion Battery, USB and 5V Wall Adapter.
Two High Effi ciency 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
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
Output for Memory Cards. Power Supply Sequencing: Main and Hot Swap Accurate USB
Current Limiting. High Frequency Operation: 1MHz. High Effi ciency: Up to 92%. 24-Lead
4mm × 4mm QFN Package
Synchronous Buck Converter, Effi ciency: >90%, Adjustable Outputs at 800mA and 400mA,
Charge Current Programmable up to 950mA, USB Compatible, 16-Lead 5mm × 3mm DFN
Package
Charges Single Cell Li-Ion Batteries Directly from a USB Port, Thermal Regulation, 200mΩ
Ideal Diode with <50mΩ option, 4mm × 3mm DFN14 Package
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
BUS
CC
LTC3555
TM
Output for SDIO and Memory Cards. 24-Lead 4mm × 4mm QFN Package
RST3
SW1
SW3
SW2
EN2
EN1
FB1
FB3
FB2
I
2
C
17
19
15
7
12
14
9,10
16
6
4
2
3555 TA03
SEND I
ONCE POWER IS DETECTED
© LINEAR TECHNOLOGY CORPORATION 2007
2
C CODE: “0x12FF04”
SDA
SCL
MEMORY
CORE
I/O
BATT(MIN)
LT 0507 • PRINTED IN USA
. Hot Swap
3555f