LTC3625-1_15 Datasheet, PDF (16/16 Pages) Linear Technology – 1A High Efficiency 2-Cell Supercapacitor Charger with Automatic Cell Balancing

LTC3625/LTC3625-1
Typical Application
Minimum External Component Application (500mA Charge Current)
V_IN*
2.7V TO 5.5V
C1
10µF
NC
NC
V_IN
V_OUT
SW1
LTC3625
SW2
PFI
V_MID
CTL
EN
V_SEL
PGOOD
PFO
PROG GND
L1
3.3µH
3625 TA02
V_OUT
4.8V/5.3V
C2 ≥ 0.1F
C3 ≥ 0.1F
*25mA MINIMUM LOAD REQUIRED ON V_IN
Related Parts
PART NUMBER
LTC3203/LTC3203B/
LTC3203B-1/LTC3203-1
LTC3204/LTC3204B-3.3/
LTC3204-5
LTC3221/LTC3221-3.3/
LTC3221-5
LTC3225/LTC3225-1
DESCRIPTION
500mA Low Noise High Efficiency Dual Mode
Step-Up Charge Pumps
Low Noise Regulating Charge Pumps
Micropower Regulated Charge Pump
150mA Supercapacitor Charger
LTC3240-3.3/LTC3240-2.5 Step-Up/Step-Down Regulated Charge Pumps
LT^®3420/LT3420-1
1.4A/1A Photoflash Capacitor Charger with
Automatic Top-Off
LT3468/LT3468-1/
LT3468-2
1.4A/1A/0.7A, Photoflash Capacitor Charger
LTC3484-0/LTC3484-1/
LTC3484-2
1.4A/0.7A/1A, Photoflash Capacitor Charger
LT3485-0/LT3485-1/
LT3485-2/LT3485-3
1.4A/0.7A/1A/2A Photoflash Capacitor Charger
with Output Voltage Monitor and Integrated
IGBT
LT3750
Capacitor Charger Controller
LT3751
Capacitor Controller with Regulation
LTC4425
Supercapacitor Charger with Current-Limited
Ideal Diode
COMMENTS
V_IN: 2.7V to 5.5V, 3mm × 3mm 10-Lead DFN Package
Up to 150mA Output Current (LTC3204-5), Up to 50mA Output Current
(LTC3204-3.3)
Up to 60mA Output Current
Programmable Supercapacitor Charger Designed to Charge Two
Supercapacitors in Series to a Fixed Output Voltage (4.8V/5.3V Selectable)
from a 2.8V/3V to 5.5V Input Supply. Automatic Cell Balancing Prevents
Overvoltage Damage to Either Supercapacitor. No Balancing Resistors are
Required.
Up to 150mA Output Current
Charges 220µF to 320V in 3.7 Seconds from 5V, V_IN: 2.2V to 16V,
I_SD < 1µA, 10-Lead MS Package
V_IN: 2.5V to 16V, Charge Time = 4.6 Seconds for the LT3468 (0V to 320V,
100µF, V_IN = 3.6V), I_SD < 1µA, ThinSOT^TM Package
V_IN: 1.8V to 16V, Charge Time = 4.6 Seconds for the LT3484-0 (0V to 320V,
100µF, V_IN = 3.6V), I_SD < 1µA, 2mm × 3mm 6-Lead DFN Package
V_IN: 1.8V to 10V, Charge Time = 3.7 Seconds for the LT3485-0 (0V to 320V,
100µF, V_IN = 3.6V), I_SD < 1µA, 3mm × 3mm 10-Lead DFN Driver
Charges Any Size Capacitor, 10-Lead MS Package
Charges Any Size Capacitor, 4mm × 5mm QFN-20 Package
CC/CV Linear Charger for 2-Cell Supercapacitor Stack from a Li-Ion/
Polymer Battery, USB Port or a 2.7V to 5.5V Current-Limited Supply,
3mm × 3mm DFN-12 and MSOP-12E Packages
16 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
3625f
LT 0710 • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2010