LTC3526L/LTC3526LB



3526lfc

n

MedicalInstruments

n

NoiseCancelingHeadphones

n

WirelessMice

n

BluetoothHeadsets

ApplicAtions

550mA 1MHz Synchronous

Step-Up DC/DC Converters

in 2mm

× 2mm DFN

frequencystep-upDC/DCconverterswithoutputdiscon-

nect.Synchronousrectificationenableshighefficiencyin

thelowprofile2mm

×2mmDFNpackage.Batterylifein

singleAA/AAApoweredproductsisextendedfurtherwith

a680mVstart-upvoltageandoperationdownto500mV

oncestarted.

Aswitchingfrequencyof1MHzminimizessolutionfoot-

printbyallowingtheuseoftiny,lowprofileinductors

andceramiccapacitors.ThecurrentmodePWMdesign

isinternallycompensated,reducingexternalpartscount.

TheLTC3526LfeaturesBurstModeoperationatlightload

conditionsallowingittomaintainhighefficiencyovera

widerangeofload.TheLTC3526LBfeaturesfixedfrequency

operationforlownoiseapplications.Anti-ringcircuitry

reducesEMIbydampingtheinductorindiscontinuous

mode.Additionalfeaturesincludealowshutdowncurrent

ofunder1µAandthermalshutdown.

TheLTC3526L/LTC3526LBarehousedina2mm

×2mm

×0.75mmDFNpackage.

L

,LT,LTC,LTM,LinearTechnology,theLinearlogoandBurstModeareregisteredtrademarks

andThinSOTisatrademarkofLinearTechnologyCorporation.Allothertrademarksarethe

propertyoftheirrespectiveowners.

n

Delivers 3.3V at 100mA from a Single Alkaline/

NiMH Cell or 3.3V at 200mA from Two Cells

n

n

n

Up to 94% Efficiency

n

Output Disconnect

n

1MHz Fixed Frequency Operation

n

n

Integrated Soft-Start

n

CurrentModeControlwithInternalCompensation

n

n

LowNoisePWMOperation(LT3526LB)

n

InternalSynchronousRectifier

n

n

Anti-RingControl

n

LowProfile(2mm

×2mm×0.75mm)

DFN-6Package

SW

1.78M

1M

3526l TA01a

LTC3526L

SHDN

FB

1.6V TO 3.2V

3.3V

200mA

OFF ON

4.7µH

4.7µF

4.7µF

GND

LOAD CURRENT (mA)

0.01

40

50

60

70

80

0.1

1

10

100

1000

30

20

10

0

90

100

1

10

100

0.1

0.01

1000

EFFICIENCY

POWER LOSS

Efficiency and Power Loss vs Load Current

typicAl ApplicAtion

FeAtures

Description