LTC3526-2/LTC3526B-2



35262b2fc

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MedicalInstruments

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Flash-BasedMP3Players

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NoiseCancelingHeadphones

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WirelessMice

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BluetoothHeadsets

ApplicAtions

500mA 2MHz Synchronous

Step-Up DC/DC Converters

in 2mm

× 2mm DFN

frequencystep-upDC/DCconverterswithoutputdiscon-

nect. Synchronous rectification enables high efficiency

inthelowprofile2mm

×2mmDFNpackage.Batterylife

insingleAA/AAApoweredproductsisextendedfurther

withan850mVstart-upvoltageandoperationdownto

500mVoncestarted.

Aswitchingfrequencyof2MHzminimizessolutionfoot-

printbyallowingtheuseoftiny,lowprofileinductors

andceramiccapacitors.ThecurrentmodePWMdesign

isinternallycompensated,reducingexternalpartscount.

TheLTC3526-2featuresBurstModeoperationatlightload

conditions, while the LTC3526B-2 features continuous

switching.Anti-ringcircuitryeliminatesEMIconcernsby

dampingtheinductorindiscontinuousmode.Additional

featuresincludealowshutdowncurrentofunder1µAand

thermalshutdown.

The LTC3526-2/LTC3526B-2 are housed in a 6-pin

2mm

×2mm×0.75mmDFNpackage.

For new designs, we recommend the LTC3526L-2/

LTC3526LB-2.

L

,LT,LTC,LTM,LinearTechnology,theLinearlogoandBurstModeareregisteredtrademarks

andThinSOTisatrademarkofLinearTechnologyCorporation.Allothertrademarksarethe

propertyoftheirrespectiveowners.Patentspending.

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Delivers 3.3V at 100mA from a Single Alkaline/

NiMH Cell or 3.3V at 200mA from Two Cells

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Up to 94% Efficiency

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Output Disconnect

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2MHz Fixed Frequency Operation

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Integrated Soft-Start

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CurrentModeControlwithInternalCompensation

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(LTC3526-2)

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LowNoisePWMOperation(LTC3526B-2)

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InternalSynchronousRectifier

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Anti-RingingControl

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LowProfile(2mm

×2mm×0.75mm)DFN-6Package

SW

1.78M

2.2µH

1M

1µF

4.7µF

35262b2 TA01a

LTC3526-2

SHDN

FB

1.6V TO 3.2V

3.3V

200mA

OFF ON

GND

LOAD CURRENT (mA)

0.01

40

50

60

70

80

0.1

1

10

100

1000

35262b2 TA01b

30

20

10

0

90

100

1

10

100

0.1

0.01

1000

EFFICIENCY

POWER LOSS

LTC3526-2 Efficiency and Power Loss vs Load Current

typicAl ApplicAtion

FeAtures

Description

NOT RECOMMENDED FOR NEW DESIGNS

Contact Linear Technology for Potential Replacement