LTC3121 datasheet(26/26 Pages) LINER

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LTC3121

3121fa

For more information www.linear.com/LTC3121

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LINEAR TECHNOLOGY CORPORATION 2015

LT 0416 REV A • PRINTED IN USA

LinearTechnology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408)432-1900 ● FAX: (408) 434-0507 ● www.linear.com/LTC3121

relaTeD parTs

Typical applicaTion

Dual Supercapacitor Backup Power Supply, 0.5V to 5V

PART NUMBER

DESCRIPTION

COMMENTS

LTC3421

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

with Output Disconnect

95% Efficiency, VIN = 0.5V to 4.5V, VOUT(MAX) = 5.25V, IQ = 12μA,

ISD < 1μA, QFN24 Package

LTC3422

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

with Output Disconnect

95% Efficiency, VIN = 0.5V to 4.5V, VOUT(MAX) = 5.25V, IQ = 25μA,

ISD < 1μA, 3mm × 3mm DFN Package

LTC3112

2.5A ISW, 750kHz, Synchronous Buck-Boost DC/DC Converter

with Output Disconnect, Burst Mode Operation

95% Efficiency, VIN = 2.7V to 15V, VOUT(MAX) = 14V, IQ = 50μA,

ISD < 1μA, 4mm × 5mm DFN and TSSOP Packages

LTC3458

1.4A ISW, 1.5MHz, Synchronous Step-Up DC/DC Converter/

Output Disconnect/Burst Mode Operation

93% Efficiency, VIN = 1.5V to 6V, VOUT(MAX) = 7.5V, IQ = 15μA,

ISD < 1μA, DFN12 Package

LTC3528

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

with Output Disconnect/Burst Mode Operation

94% Efficiency, VIN = 700mV to 5.25V, VOUT(MAX) = 5.25V, IQ = 12µA,

ISD < 1µA, 3mm × 2mm DFN Package

LTC3539

2A ISW, 1MHz/2MHz, Synchronous Step-Up DC/DC Converters

with Output Disconnect/Burst Mode Operation

94% Efficiency, VIN = 700mV to 5.25V, VOUT(MAX) = 5.25V, IQ = 10µA,

ISD < 1µA, 3mm × 2mm DFN Package

LTC3459

70mA ISW, 10V Micropower Synchronous Boost Converter/

Output Disconnect/Burst Mode Operation

VIN = 1.5V to 5.5V, VOUT(MAX) = 10V, IQ = 10μA, ISD < 1μA,

ThinSOT™ Package

LTC3499

750mA Synchronous Step-Up DC/DC Converters with

Reverse-Battery Protection

94% Efficiency, VIN = 1.8V to 5.5V, VOUT(MAX) = 6V, IQ = 20µA,

ISD < 1µA, 3mm × 3mm DFN and MSOP Packages

LTC3115-1

40V, 2A Synchronous Buck-Boost DC/DC Converter

95% Efficiency, VIN = 2.7V to 40V, VOUT(MAX) = 40V, IQ = 50µA,

ISD < 3µA, 4mm × 5mm DFN and TSSOP Packages

LTC3122

2.5A ISW, 3MHz, Synchronous Step-Up DC/DC Converter with

Output Disconnect, Burst Mode Operation

95% Efficiency, VIN = 1.8V to 5.5V [500mV After Start-Up],

VOUT(MAX) = 15V, IQ = 25µA, ISD < 1µA, 3mm × 4mm DFN and MSOP

Packages

LTC3124

5A ISW, 6MHz, Dual Phase, Synchronous Step-Up DC/DC

Converter with Output Disconnect, Burst Mode Operation

95% Efficiency, VIN = 1.8V to 5.5V [500mV After Start-Up],

VOUT(MAX) = 15V, IQ = 25µA, ISD < 1µA, 3mm × 5mm DFN and TSSOP

Packages

3121 TA09a

VIN

VOUT

LTC3121

SGND

PGND

43.2k

1nF

3.3µH

121k

383k

68pF

CVCC

4.7µF

100nF

COUT

47µF

VOUT

57.6k

VIN

0.5V TO 5V

CIN, CVCC: 4.7µF, 6.3V, X7R, 1206

C1: 100nF, 6.3V, X7R, 1206

COUT: 47µF, 6.3V, X7R, 1812

L1: TDK SPM6530T-3R3M

SC1, SC2: MAXWELL BCAP0050-P270

SC1

50F

SC2

50F

PWM/SYNC

VCC

CAP

OFF

CIN

4.7µF

200s/DIV

3121 TA09b

2V/DIV

OUTPUT

CURRENT

50mA/DIV

VOUT

5V/DIV

VIN

2V/DIV

LTC3121 Datasheet(PDF) 26 Page - Linear Technology

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