LT3750 datasheet(16/16 Pages) LINER

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LTC3226

3226fa

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com

©LINEAR TECHNOLOGY CORPORATION 2011

LT 0512 REV A • PRINTED IN USA

RELATED PARTS

TYPICAL APPLICATION

Li-Ion Backup Supply

VOUT

GATE

MPEXT

VIN

PFI

C+

CFLY

2.2μF

2.21M

1.21M

C–

PROG

EN_CHG

H/L

RST

PFO

CAPGOOD

GND

LTC3226

CPO

VMID

4.7μF

Li-Ion

47μF

TO LOAD

RPROG

33.2k

3.83M

CSC

1.2F

1.21M

255k

80.6k

470k

CSC: CAP-XX HS230

MPEXT: VISHAY Si2333

470k

3226 TA02

CPO_FB

LDO_FB

RST_FB

μP

PART

NUMBER

DESCRIPTION

COMMENTS

LTC3225/

LTC3225-1

150mA Supercapacitor Charger

Low Noise, Constant Frequency Charging of Two Series Supercapacitors. Automatic

Cell Balancing Prevents Capacitor Overvoltage During Charging. Programmable Charge

Current (Up to 150mA). Selectable 2.4V or 2.65V Regulation per Cell (LTC3225),

Selectable 2V or 2.25V Regulation per Cell (LTC3225-1). 2mm

× 3mm DFN Package

LT3485

Photoflash Capacitor Chargers with Output

Voltage Monitor and Integrated IGBT Drive

Integrated IGBT Driver; Voltage Output Monitor; Uses Small Transformers: 5.8mm

× 5.8mm × 3mm. Operates from Two AA Batteries, Single Cell Li-Ion or Any Supply

from 1.8V Up to 10V. No Output Voltage Divider Needed; No External Schottky Diode

Required. Charges Any Size Photoflash Capacitor; 10-Lead (3mm

× 3mm) DFN Package

LTC3625/

LTC3625-1

1A High Efficiency 2-Cell Supercapacitor

Charger with Automatic Cell Balancing

High Efficiency Step-Up/Step-Down Charging of Two Series Supercapacitors. Automatic

Cell Balancing Prevents Capacitor Overvoltage During Charging. Programmable

Charging Current Up to 500mA (Single Inductor), 1A (Dual Inductor). VIN = 2.7V

to 5.5V, Selectable 2.4V/2.65V Regulation per Cell (LTC3625). Selectable 2V/2.25V

Regulation per Cell (LTC3625-1), Low No-Load Quiescent Current: 23μA.

12-lead 3mm

× 4mm DFN Package

LT3750

Capacitor Charger Controller

Charges Any Size Capacitor; Easily Adjustable Output Voltage. Drives High Current

NMOS FETs; Primary-Side Sense—No Output Voltage Divider Necessary. Wide Input

Range: 3V to 24V; Drives Gate to VCC – 2V. 10-Lead MS Package

LT3751

High Voltage Capacitor Charger Controller with

Regulation

Charges Any Size Capacitor; Low Noise Output in Voltage Regulation Mode. Stable

Operation Under a No-Load Condition; Integrated 2A MOSFET Gate Driver with

Rail-to-Rail Operation for VCC ≤ 8V. Selectable 5.6V or 10.5V Internal Gate Drive Voltage

Clamp; User-Selectable Over/Undervoltage Detect. Easily Adjustable Output Voltage;

Primary or Secondary Side Output Voltage Sense. Wide Input VCC Voltage Range

(5V to 24V). 20-Pin QFN 4mm

× 5mm and 20-Lead TSSOP Packages

LTC4425

Supercapacitor Charger with Current Limited

Ideal Diode

Constant-Current/Constant-Voltage Linear Charger for 2-cell Series Supercapacitor

Stack. VIN: Li-Ion/Polymer Battery, a USB Port, or a 2.7V to 5.5V Current-Limited

Supply. 2A Charge Current, Auto Cell Balancing, 20μA Quiescent Current, Shutdown

Current <2μA. Low Profile 12-Pin 3mm

× 3mm DFN or a 12-Lead MSOP Package

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