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WelcometoWelcometo————YourReliablePartnerYourReliablePartnerYaoYaoRuoRuo--YaYaWorldClassConsistencyandReliabilitySGMICROCONFIDENTIALLDOSGMICROCONFIDENTIALLDOLDOLow-dropoutRegulatorsU=Uin-Uout1Iq1mASGMICROCONFIDENTIALLDOSGMICROCONFIDENTIALLDO1LDOLDO345PinTO-220LDOSGMICROCONFIDENTIALLDOPin•INPUT•OUTPUT•GND•ENLDO•BP,LDOPSRR•FPADJLDOSGMICROCONFIDENTIALLDOSGMICROCONFIDENTIALLDO•LDO–InputVoltageVIN–OutputVoltageVOUT–OutputVoltageAccuracy–MaximumOutputCurrentIMAX–CurrentLimitILIM–GroundPinCurrentIq–DropoutVoltageVdif–LineRegulationVLNR–LoadRegulationVLDR–OutputVoltageNoiseen–PowerSupplyRejectionRatioPSRR–ShutdownSupplyCurrentIQ(SHDN)SGMICROCONFIDENTIALLDOSGMICROCONFIDENTIALCinCoutCBPCFRfESRSGMICROCONFIDENTIAL1234SGMICROCONFIDENTIAL12LDOPCB---11PCB2SGMICROCONFIDENTIALLDO1,2,3,BPCBPSGMICROCONFIDENTIALLDOSGMICROCONFIDENTIAL•LDO•LDO••LDOLDOSGMICROCONFIDENTIAL•LDO•LDO•LDOSGMICROCONFIDENTIALLDOIQ•IQLDO••IQIQVin•IQSGMICROCONFIDENTIALLDO•LDO•LDOReference-NoiseBypass•ESR;NPOSGMICROCONFIDENTIALRF•LDO•PSRRLDO•LDOSGMICROCONFIDENTIALLDOqSGMICROCONFIDENTIALLDOSGMICROCONFIDENTIALLDO-1•LDO•LDO•LDOSGMICROCONFIDENTIALLDO-2•LDO•LDOPpack=(Vin-Vout)*Iout•LDOPpackSGMICROCONFIDENTIALLDO-3•LDO•LDO123IC4SGMICROCONFIDENTIALLDO-•X-PCBSGMICROCONFIDENTIALLDO-•X--2-1PCB-12X-SGMICROCONFIDENTIALLDO-•SOT23LDO•Vin=5V,Vout=1.8V,Ro=25.5;•Ppack=(Vin-Vout)*Iout=(Vin-Vout)*Vout/Ro=(5-1.8)*1.8/25.5=0.226WSGMICROCONFIDENTIALLDO-•SOT23LDOPCBPCB•LDO0.226WSGMICROCONFIDENTIALLDO-•PCBALDOPCBLDOPCBLDOSGMICROCONFIDENTIALLDO-••1SGM201981.1•2SGM201993.6•3SGM201969.1•4SGM201967.2•5SGM201966.3•6SGM201968.4•7SGM201990.2•8SGM201987.9SGMICROCONFIDENTIALLDO-•PCBPCBLDO•PCBLDOLDOSGMICROCONFIDENTIALWelcometoWelcometo
本文标题:LDO基础知识
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