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LTC3526L Datasheet(PDF) 7 Page - Linear Technology |
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LTC3526L Datasheet(HTML) 7 Page - Linear Technology |
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7 / 16 page  LTC3526L/LTC3526LB 3526lfc 3 + – GATE DRIVERS AND ANTI-CROSS CONDUCTION LOGIC CLK IPK IPK COMP SLOPE COMP IZERO COMP ERROR AMP SLEEP COMP IZERO WAKE EXPOSED PAD + – WELL SWITCH MODE CONTROL UVLO VREF VREF 4M SHDN VBEST START-UP 1MHz OSC TSD THERMAL SHUTDOWN SHUTDOWN ANTI-RING VSEL VIN 1 6 SW VOUT L1 4.7µH VB SHUTDOWN CLAMP CSS VREF VOUT 5 7 GND 3526l BD 2 FB R2 COUT 4.7µF VOUT 1.5V TO 5.25V R1 4 CIN 2.2µF VIN 0.8V TO 5V block DiAgrAM (Refer to Block Diagram) operAtion TheLTC3526L/LTC3526LBare1MHzsynchronousboost convertershousedina6-lead2mm ×2mmDFNpackage. Withaguaranteedabilitytostartupandoperatefrominputs lessthan0.8V,thisdevicefeaturesfixedfrequency,current modePWMcontrolforexceptionallineandloadregula- tion.Thecurrentmodearchitecturewithadaptiveslope compensationprovidesexcellenttransientloadresponse, requiringminimaloutputfiltering.Internalsoft-startand internalloopcompensationsimplifiesthedesignprocess whileminimizingthenumberofexternalcomponents. WithitslowRDS(ON)andlowgatechargeinternalN-chan- nelMOSFETswitchandP-channelMOSFETsynchronous rectifier,theLTC3526Lachieveshighefficiencyoverawide rangeofloadcurrents.BurstModeoperationmaintains highefficiencyatverylightloads,reducingthequiescent currenttojust9µA.Operationcanbebestunderstoodby referringtotheBlockDiagram. LOW VOLTAGE START-UP TheLTC3526L/LTC3526LBincludeanindependentstart- uposcillatordesignedtostartupataninputvoltageof 0.68V(typical).Soft-startandinrushcurrentlimitingare providedduringstart-up,aswellasnormalmode. When either VIN or VOUT exceeds 1.3V typical, the IC entersnormaloperatingmode.Whentheoutputvoltage |
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Similar Description - LTC3526L |
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