1、1上海复旦微电子股份有限公司2008年04月03日2022-5-152LDODC-DCVin vs. VoutVoutVinVoutVin BoostResponse timeFastSlowEfficiencyLowHighNoiseLowHigh (Clock)CostLow (C)High (L+C)2022-5-153LDOLDO设计参数设计参数2022-5-154LDOLDO设计参数设计参数ONODORIVOOI/VIOV/V%100)II (VIVEqOIOO2022-5-155LDOLDO架构架构2022-5-156LDOLDO架构架构2022-5-157LDOLDO架构架构Om
2、p1RGALo factor)(feedback RRR212LdspOR|)R2R1(|rRolpass_o2211mpooA1RRRRAG1IV2211mpdspLioRRRAG1rR1VVLesrdspp2C)Rr (1:P2o11p1RC1:P1parobp3CR1:P3Lesrz11CR1:Z2022-5-158设计考虑设计考虑2022-5-159LDOLDO频率补偿频率补偿oopddomCR1:PoesresrCR1:ZesrbESR2CR1paroa3CR1)CC(bo2022-5-1510LDOLDO频率补偿频率补偿ffm3xC2gzffds3xCr21p2022-5-1511
3、LDOLDO频率补偿频率补偿)Crgk(r1:Pc2m2x1pddomcxm1Ck2gGBW:kx:gm2:gm1:r22022-5-1512LDOLDO频率补偿频率补偿cxn1xceqC)k1 (SV)k1 (I)n1(C2022-5-1513LDOLDO频率补偿频率补偿cccooozCR1Cr1PkrRock/CCoc2022-5-1514LDOLDO频率补偿频率补偿1121xCSR1RRR121RRR )CC)(RR(|R|r(S1R|r|)R(RSC1|R|r|RR1L21LdsLds21LLdsxo)CC)(RR(|R|r (11L21Ldsp112z1CR1parparp2RC12
4、022-5-1515LDOLDO频率补偿频率补偿ompo2m2o1m1oRgRgRgA Lo1CR/1p mo2o1m22CRRg/1p mmmRC/1zF1F2F1fC)R|R(1p F1F1fCR1z 2022-5-1516LDOLDO频率补偿频率补偿o12m12mkI21g1RmmmRC/1z2022-5-1517LDOLDO频率补偿频率补偿)ps1(ggCCs)ggCgCCRC( s1)ps(1)zs1)(zs1 (L) s (Lfmpm2outg2mpm2m1m4outgeout1efooF2F1F2opmpo2m2o1m1oRRRrgRgRgLopmpo2m2o1m11rgRgRC
5、/1p eouteRC/1z )R|R(C/1pF2F1F1fF1F1fRC/1z 2022-5-1518LDOLDO频率补偿频率补偿2022-5-1519LDOLDO频率补偿频率补偿2022-5-1520LDOLDO频率补偿频率补偿Lo1CR1paroa2CR1c12m63CR)Rg1 (1)g/1 (|RRm73oacczCR12022-5-1521设计实例设计实例2022-5-1522设计实例设计实例2022-5-1523设计实例设计实例221RRRVrefVo21221opmpo1m121221opmp1VLRRR)RR(|(rgrkgRRR)RR(|(rgAA|)V|V)(LW(C1
6、RtpGSoxpmos_ds)LW(CBA2IVVoxpotpGSO_EAopmpc2c11Rr)gC(kC1Lc2mpc12CCgkCoopI1rpar_passmb3Cg1u)CI ()LW(C2goboxpmb2022-5-1524设计实例设计实例2022-5-1525设计实例设计实例2022-5-1526设计实例设计实例Temp. ()VDO (mv) 1mAVDO (mv) 200mAVDO (mv) 300mA250.599148-400.4284127850.561091642022-5-1527设计实例设计实例VinTemp()Ld_reg(mv/A)(m)4.225234.2
7、-40/8522/213.425/-40/85187/92/229Temp()Lin_reg(mv/V)250.57-400.66850.702022-5-1528设计实例设计实例2022-5-1529设计实例设计实例IloadGain(dB)GB(khz)075.80.92850uA79.24.9310mA75.733.5300mA73.551.32022-5-1530设计实例设计实例2022-5-1531设计实例设计实例ESR1omax_loadtr_maxVtCIVsrbufferbufferclsrcl1IVCBW1tBW1t2tESR3outmax_load3VtCIV3t42refout4VRVCt2022-5-1532设计实例设计实例2022-5-1533设计实例设计实例2022-5-1534设计实例设计实例2022-5-1535设计实例设计实例2022-5-1536参考文献参考文献2022-5-1537参考文献参考文献
