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LTC3526-2 Datasheet(PDF) 7 Page - Linear Technology |
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LTC3526-2 Datasheet(HTML) 7 Page - Linear Technology |
7 / 16 page LTC3526-2/LTC3526B-2 35262b2fc 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 1.195V 4M SHDN VBEST START-UP 2MHz OSC TSD THERMAL SHUTDOWN SHUTDOWN ANTI-RING VSEL VIN 1 6 SW VOUT L1 2.2µH VB SHUTDOWN CLAMP CSS VREF VOUT 5 7 GND 35262b2 BD 2 FB R2 COUT 4.7µF VOUT 1.6V TO 5.25V R1 4 CIN 2.2µF VIN 0.85V TO 5V block DiAgrAM (Refer to Block Diagram) operAtion TheLTC3526-2/LTC3526B-2are2MHzsynchronousboost convertershousedina6-lead2mm ×2mmDFNpackage. Withtheabilitytostartupandoperatefrominputsless than 1V, these devices feature fixed frequency, current modePWMcontrolforexceptionallineandloadregula- tion.Thecurrentmodearchitecturewithadaptiveslope compensationprovidesexcellenttransientloadresponse, requiringminimaloutputfiltering.Internalsoft-startand internalloopcompensationsimplifiesthedesignprocess whileminimizingthenumberofexternalcomponents. WithitslowRDS(ON)andlowgatechargeinternalN-chan- nelMOSFETswitchandP-channelMOSFETsynchronous rectifier,theLTC3526-2achieveshighefficiencyoverawide rangeofloadcurrents.AutomaticBurstModeoperation maintains high efficiency at very light loads, reducing thequiescentcurrenttojust9µA.Operationcanbebest understoodbyreferringtotheBlockDiagram. LOW VOLTAGE START-UP TheLTC3526-2/LTC3526B-2includeanindependentstart- uposcillatordesignedtostartupataninputvoltageof 0.85V(typical).Soft-startandinrushcurrentlimitingare providedduringstart-up,aswellasnormalmode. When either VIN or VOUT exceeds 1.4V typical, the IC entersnormaloperatingmode.Whentheoutputvoltage |
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Similar Description - LTC3526-2 |
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