LTC3643
26
3643fb
For more information www.linear.com/LTC3643
LINEAR TECHNOLOGY CORPORATION 2015
LT 0216 REV B • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
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www.linear.com/LTC3643
RELATED PARTS
TYPICAL APPLICATION
PART NUMBER DESCRIPTION COMMENTS
LTC3110 2A Bi-Directional Buck-Boost DC/DC Regulator and
Charger/Balancer
V
CAP
Range: 0.1V to 5.5V V
SYS
Range 1.71V to 5.25V, Automatic Switchover
from Charge to Backup Mode. 24-Lead TSSOP and 4mm × 4mm QFN
Packages.
LTC3128 3A Monolithic Buck-Boost Supercapacitor Charger
and Balancer with Accurate Input Current Limit
±2% Accurate Average Input Current Limit Programmable to 3A, Active Charge
Balancing, Charges 1
or 2 Capacitors, V
IN
Range: 1.73V to 5.5V, V
OUT
Range:
1.8V to 5.5V, 20-Lead 4mm × 5mm QFN and 24-Lead TSSOP Packages
LTC3226 2-Cell Supercapacitor Charger with Backup
PowerPath Controller
1x/2x Multimode Charge Pump Supercapacitor Charger, Automatic Cell
Balancing, PowerPath, 2A LDO Backup Supply, Automatic Main/Backup
Switchover, 2.5V to 5.5V, 16-Lead 3mm × 3mm QFN Package
LTC3350 High Current Supercapacitor Backup Controller and
System Monitor
High
Efficiency Charging of 1 to 4 Series Supercapacitors. Step-Up Mode in
Backup, System Health Monitoring. 38-Lead 5mm × 7mm QFN Package.
LTC3355 20V, 1A Buck DC/DC with Integrated SCAP Charger
and Backup Regulator
V
IN
: 3V to 20V, V
OUT
: 2.7V to 5V, 1A Main Buck Regulator, 5A Boost Backup
Regulator Powered from Single Supercapacitor, Overvoltage Protection.
20-Lead 4mm × 4mm QFN Package
LTC3625 1A High Efficiency
2-Cell Supercapacitor Charger
with Automatic Cell Balancing
High Efficiency Step-Up/Step-Down Charging of Tw o Series Supercapacitors.
Automatic Cell Balancing. Programmable Charging Current to 500mA (Single
Inductor), 1A (Dual Inductor). 12-Lead 3mm × 4mm DFN Package
LTC4425 Linear SuperCap Charger with Current-Limited Ideal
Diode and V/I Monitor
Constant-Current/Constant-Voltage Linear Charger for 2-Cell Series
Supercapacitor Stack. V
IN
: Li-Ion/Polymer Battery, a USB Port, or a 2.7V to
5.5V Current-Limited Supply. 2A Charge Current, Automatic Cell Balancing,
Shutdown Current <2μA. 12-Pin 3mm × 3mm DFN or 12-Lead MSOP Package
LTC4040 2.5A Battery Backup Power Manager V
IN
: 3.5V to 55V Contains a High Current Step-Up DC/DC Regulator to Back-Up
the Supply from A Single Cell Li-Ion LiFePO
4
Battery, 24-Lead 4mm × 5mm
QFN Package
0.1µF
22µF
GND
PFO
CAPGD
FBSYS
PFI
RUN
GATE
LTC3643
SWINDISV
IN
CLP
CAP
FBCAP
BOOST
ITH
INTV
CC
392k
6.04k
7.2µH
47µF
4.7µF
V
IN
3V TO 17V
V
OUT
40V
3.3nF
47pF
3643 TA04
108k
40V Synchronous Boost Regulator with Input Disconnect
