LDO和三端稳压器选用和设计规范V1.0-1

LDONPNLDOLDO(quasi-LDO)PMOSNMOS1LDOPMOSLDO11171084LDOAP130/RT9172PMOSLDOLDOLDO2LDO(LDO)2VTR3R4AAVrefAVoutVoutLDOLDOR3R4LDOR3R4R3R4LDOR3R4R3R43LDOLDOVout=Vref*(1+R2/R1)+Iadj*R2IadjR2Iadj*R2R2Iadj*R21117Iadj50uAR22K0.1VLDOVref1.25VANACHIPAP133Vref=0.8V11.25VLDO1Pout/Pin=(Iout*Vout)/(Iin*Vin)=(Iout*Vout)/((Iout+Ignd)*Vin)IgndIoutVout/VinLDOLDOPdissipationVINVOUTILOAD8010080SOT-2231117117/W15040,IC1500.840/117/W0.68WTA=25SOT-223600700mWTO-2521.01.1WTO-263/2201.11.2WSOT-89300400mWSOT-23200mWTO-92500mW4PDJADerating802VdropVdropVdrop-IoutLDOVdropVin-Vout3.3V2.5V2.5V1.8VLDOVdrop3ICVinVinVoutVdropVinV4IC5ESR1/(2ReC)ReCESRESRESRtanδ/(ω×Cs)CsESRESRLDOESR47uF47uF100uF5V10V10V16VESRPNPLDOESRESR6PSRRPSRR(PowerSupplyRejectionRatio)PSRR=20log[Ripple(Vin)/Ripple(Vout)]PSRRLDOBypass,LDOPSRRLDO470pF1uF7(MinimumLoadCurrent)2LDOR3R4LDOIR3+ILoadIMiniLoadILoad=0IR3IMiniLoadLDOR3R4ICLDOR33R1VREF/R1IMiniLoadVREF1.25VIMiniLoad10mAR1125120R28PCB5LDOPCB6PCBLDO5LDOPCB6PCBLDOLDO1234121PSRR2ESRESRESRC+RtraceLDORtraceESR3491VIN=5VVOUT=3.3VILOAD=800mAPdissipation53.30.8=1.36WESR16V/100uF16V/47uFLDO1.36WSOT-223TO263PCB2VIN=3.3VVOUT=2.5VILOAD=800mAPdissipation3.32.50.8=0.64W3.3V2.5V0.8VLDO800mA1VLDOAP1184VDROP0.7V4A3VIN=3.3VVOUT=1.8VILOAD=800mAPdissipation3.31.80.8=1.2W4VIN=2.5VVOUT=1.8VILOAD=800mAPdissipation2.51.80.8=0.56WLDO10mAVref/R110mAR11251205VIN=2.5VVOUT=1.25VILOAD=800mAPdissipation2.51.250.8=1.0W6VIN=1.8VVOUT=1.25VILOAD=800mAPdissipation1.81.250.8=0.44W0.55VAP11841AVdrop0.18V7VIN=12VVOUT=9VILOAD=100mAPdissipation1290.1=0.3W9V111710847809