LTC3125 datasheet(18/18 Pages) LINER

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LTC3125

3125fa

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

©LINEAR TECHNOLOGY CORPORATION 2008

LT 1210 REV A • PRINTED IN USA

RELATED PARTS

PART NUMBER

DESCRIPTION

COMMENTS

LTC3127

1A Buck-Boost Converter with Programmable Input Current

Limit

96% Efﬁciency, ±4% Accurate Average Input Current Limit,

VIN: 1.8V to 5.5V, VOUT = 1.8V to 5.25V, IQ = 35μA, DFN Package

LTC3421

3A (ISW), 3MHz, Synchronous Step-Up DC/DC Converter with

Output Disconnect

94% Efﬁciency, VIN: 0.85V to 4.5V, VOUT(MAX) = 5.25V,

IQ = 12μA, ISD < 1μA, 4mm × 4mm QFN24 Package

LTC3422

1.5A (ISW), 3MHz Synchronous Step-Up DC/DC Converter with

Output Disconnect

94% Efﬁciency, VIN: 0.85V to 4.5V, VOUT(MAX) = 5.25V,

IQ = 25μA, ISD < 1μA, 3mm × 3mm DFN10 Package

LTC3459

80mA (ISW), Synchronous Step-Up DC/DC Converter

92% Efﬁciency, VIN: 1.5V to 5.5V, VOUT(MAX) = 10V, IQ = 10μA,

ISD < 1μA, ThinSOT Package

LTC3523/LTC3523-2

600mA (ISW), Step-Up and 400MHz Synchronous Step-Down

1.2MHz/2.4MHz DC/DC Converter with Output Disconnect

94% Efﬁciency VIN: 1.8V to 5.5V, VOUT(MAX) = 5.25V, IQ = 45μA,

ISD < 1μA, 3mm × 3mm QFN16 Package

LTC3525-3/

LTC3525-3.3/

LTC3525-5

400mA (ISW), Micropower Synchronous Step-Up DC/DC

Converter with Output Disconnect

94% Efﬁciency, VIN: 0.85V to 4V, VOUT(MAX) = 5V, IQ = 7μA,

ISD < 1μA, SC-70 Package

LTC3526/LTC3526L

LTC3526B

500mA (ISW), 1MHz Synchronous Step-Up DC/DC Converter

with Output Disconnect

94% Efﬁciency VIN: 0.85V to 5V, VOUT(MAX) = 5.25V, IQ = 9μA, ISD

< 1μA, 2mm

× 2mm DFN6 Package

LTC3527/LTC3527-1

Dual 800mA/400mA (ISW), 2.2MHz Synchronous Step-Up

DC/DC Converter with Output Disconnect

94% Efﬁciency VIN: 0.7V to 5V, VOUT(MAX) = 5.25V, IQ = 12μA, ISD

< 1μA, 3mm

× 3mm QFN16 Package

LTC3528/LTC3528B

1A (ISW), 1MHz Synchronous Step-Up DC/DC Converter with

Output Disconnect

94% Efﬁciency VIN: 0.7V to 5.5V, VOUT(MAX) = 5.25V, IQ = 12μA,

ISD < 1μA, 2mm × 3mm DFN8 Package

LTC3537

600mA (ISW), 2.2MHz Synchronous Step-Up DC/DC Converter

with Output Disconnect and 100mA LDO

94% Efﬁciency VIN: 0.7V to 5V, VOUT(MAX) = 5.25V, IQ = 30μA,

ISD < 1μA, 3mm × 3mm QFN16 Package

LTC3539/LTC3539-2

2A (ISW), 1MHz, 2.2MHz Synchronous Step-Up DC/DC

Converter with Output Disconnect

94% Efﬁciency, VIN: 0.7V to 5V, VOUT(MAX) = 5.25V,

IQ = 10μA, ISD < 1μA, 2mm × 3mm DFN Package

PC Card or CompactFlash (3.3V/500mA Maximum) 4.5V Output,

GSM Pulsed Load

2.2μH*

LTC3125

GND

VIN

2.74M

2200μF**

×2

55mΩ

TANT

10μF

CER

VOUT

4.5V, 2A PULSED LOAD

(577μs PW, 4.6ms PERIOD)

VIN

PC CARD VCC

3.3V ±10%

500mA MAX

*COILTRONICS SD3118-2R2-R

**VISHAY 592D228X6R3X220H

3125 TA02a

SHDN

PROG

VOUT

44.2k

OFF ON

Waveforms of Input Current, VOUT for Pulsed Load Current

VOUT

100mV/DIV

INPUT CURRENT

200mA/DIV

LOAD CURRENT

2A/DIV

1ms/DIV

VIN = 3.3V

VOUT = 4.5V

COUT = 4.4mF

L = 2.2μH

RPROG = 44.2k

3125 TA02b

TYPICAL APPLICATION

LTC3125 Datasheet(PDF) 18 Page - Linear Technology

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