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第5章 升压型BOOST开关稳压器-lm2577.pdf

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LM1577,LM2577

SNOS658D–JUNE1999–REVISEDAPRIL2013

LM1577/LM2577SIMPLESWITCHER®Step-UpVoltageRegulator

CheckforSamples:LM1577,LM2577

1FEATURESDESCRIPTION

23•RequiresFewExternalComponentsTheLM1577/LM2577aremonolithicintegrated

circuitsthatprovideallofthepowerandcontrol

•NPNOutputSwitches3.0A,canStandoff65V

functionsforstep-up(boost),flyback,andforward

•WideInputVoltageRange:3.5Vto40Vconverterswitchingregulators.Thedeviceis

•Current-modeOperationforImprovedavailableinthreedifferentoutputvoltageversions:

TransientResponse,LineRegulation,and12V,15V,andadjustable.

CurrentLimitRequiringaminimumnumberofexternal

•52kHzInternalOscillatorcomponents,theseregulatorsarecosteffective,and

•Soft-startFunctionReducesIn-rushCurrentsimpletouse.Listedinthisdatasheetareafamilyof

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