【应用】国产高性能LDO LTP3558用于超声波燃气表计量模块，静态电流低至1.5µA，输出电流200mA

时间： 2022-06-22 来源：世强

技术问答

在一个超声波燃气表计量模块的项目中，客户想要选用一款低静态电流、输出电压3.3V、输出电流150mA以上的LDO给计量模块供电，输入端是由4节干电池串联接入，鉴于此需求给客户推荐了先积集成 LTP3558。其在该超声波燃气表计量模块项目中应用的系统框图如下图1所示：

图1 超声波燃气表计量模块系统框图

先积集成LTP3558是一款高输入电压、低功耗和高性能LDO。该系列采用先进的CMOS工艺和P-MOSFET器件，实现快速启动，高输出电压精度。LTP3558只需要搭配两颗1μF～10μF的陶瓷电容即可实现稳定输出，采用精密的电压基准和反馈回路，在所有负载、线性和温度变化等情况下，输出电压依然可以保持较高精度。其框架图如下图2所示：

图2 LTP3558内部框图

LTP3558系列LDO输入电压范围高达36V，输出电流200mA，静态电流1.5μA，短路保护电流100mA，标准固定输出电压有1.8V、2.5V、3.0V、3.3V、3.6V和5.0V等选择，为降低输入噪声并提高带载瞬间动态响应能力，在实际应用中，需要在输入、输出端各放置一颗1μF~10μF的陶瓷电容，其典型应用如下图3所示。

图3 LTP3558典型应用

超低静态电流使得LTP3558非常适用于电池供电场景，通过减少待机功耗来延长电池寿命，可用于物联网，智能穿戴，手持的仪器仪表，无线采集装置，燃气表等产品。

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ESD TVS MOS LDO 二極管三極管產品選型册

型号- SXTVSHC2EN4V8UA,P4SMA16A,SX3404MI,SMAJ6.0CA,SX30P03DF,SMAJ40CA,MMBZ5258B,SMF10CA,SMF4760A,6KP180A,SXTVSHC2EN4V8UF,5.0SMDJ170A,DAN217U,SXJ60N65MP,15KP58A,SX240N10T,MMBZ5259B,SMDJ78CA,6KP22CA,SX7N65D,SX20N15D,SX5N50D-L,5.0SMDJ300CA,1.5SMC13CA,SMCJ14CA,SX3N04AI,SX2P06AI,P4SMA18A,SX90P01NF,MMBZ5256B,5.0SMDJ85A,2SB1260,DTC143TCA,P4SMA16CA,SMCJ100CA,SMBJ300A,5KP30A,SMF4762A,SMBJ150CA,SMF120CA,DTA124XE,BZT52C8V2,SMDJ170A,DTA123JKA,SMAJ70A,RB400D,P4SMA520A,6KP6.0A,6KP58A,MMBZ5257B,MMSZ5225B,SMDJ58A,MMSZ5252BS,SMF4761A,SMCJ30A,1SMA5930A,BCX70J,SX60P02D,BC847PN,SXESDNC563T5VU,2SA1036,2SA1037,1.5SMB7.5CA,15KP54A,1SMA4731A,1.5SMB9.1CA,SXTVSHC3N24VUSXH,SX68N04NF,15KP120CA,RB520G-30,SMF190A,SX60N02DF,1SMA5931A,P6KE8.2CA,SMAJ100A,SX60P03D,BAT46WS,B1040W,B1040X,P4KE180A,1SMA4730A,5.0SMDJ170CA,BAS40V,BAS40W,SS210F,BAS40T,SX30P10D,P4SMA82CA,SX20N15S,2SA1013,RB520CS-30,SMDJ54A,SMDJ160CA,SX1N10I,SMBJ400CA,SMF36CA,1SMA4733A,SMCJ80CA,SX7N60D,SX240N15T,P6SMB51CA,1.0SMB180A,P4KE22CA,SK32BF,BZT584B2V7S,SX60N02BD,PNM3FD201E0,1.0SMB22CA,SMCJ220CA,DA204U,A733,AZ23C30W,5.0SMDJ80A,6KP6.5A,1SMA4732A,BAT720,SX100N04NF,MMBD4448HADW,SX8N06S,1.5SMC39CA,P0080SC,SMA5923B,DZ23C6V2,SX150N04NF,BZX84C2V4W,1.5KE36CA,MMBD4448HAQW,SX50N03D,1SMA5934A,DZ23C6V8,BZX84C2V4T,P0080SB,P0080SA,1SS401,1SS404,5KP36A,MMBZ5250B,SX8205A-14,SXG110N10T,P6SMB16A,1SS400,1SMA4735A,1.5SMB110A,SMAJ18CA,6KP400A,SX135N03NF,SMA5922B,SD20-SX,5KP90CA,SX50N04D,1SMA5935A,SMDJ51A,DTA123JUA,P4SMA170A,SX8205A-21,MMBZ5251B,P6SMB15A,MBR0540W,1SMA4734A,SX50N03S,P4SMA10A,1SMA5932A,BAS70-06,SMA5925B,BAS70-04,BAS70-05,1.5SMC440A,DTC143TKA,P6SMB520A,SXTVSHC3N15VU,1SMA4737A,SX4N06SI,BZX584B8V2,BZT584B2V4S,5KP24CA,SX5N10BSI,P6SMB16CA,BZT52C3V9S,P4SMA11A,SMA5924B,SMBJ90A,SMF64A,SMBJ12CA,1SMA5933A,SX80N07NF,P6SMB13A,1.0SMB250CA,6KP48CA,1SMA4736A,AZ23C2V7W,2SD965A,SD101BWS,SMBJ5.0A,P4SMA12A,SMA5927B,SMF1160A,2SD1767,2SD1766,1SMA5938A,1.0SMB6.8A,MMBZ5254B,6KP180CA,MMSZ5226B,P6SMB12A,SXESDUC2XD3V3UF,SX50N06Y,SX20N10D,MMBZ5227BW,1SMA4739A,SS520F,SMA5926B,P4SMA13A,P6KE180CA,1SMA5939A,BZT52C3V3S,MMBZ5255B,P6SMB10A,BV08C,SX20N10Y,MMSZ5227B,P4SMA47CA,P6SMB11A,DTA124ECA,SXESDLC363T5VU,1SMA4738A,P6SMB100CA,SMA5929B,5.0SMDJ78CA,BV05C,P4KE400A,2SC2412K,BZT52C3V6S,SX50N05D,1SMA5936A,1.0SMB130CA,SX5N15S,MMBZ5252B,MMSZ5228B,1.5KE10CA,SXESDSC2FD5VU,SS215F,SX50N04S,SMA5928B,SX180P04T6,SMF60A,P4SMA15A,1SMA5937A,SXESD5Z7.0,DTC114YCA,BZX84C2V7W,MMBZ5253B,BZX84C2V7T,P6KE27CA,SXESDSC2FD5VB,SX50N06D,5KP33A,SX8808CF,P6SMB82CA,RB521BS-30,SXESDUC3FD5VU,MMSZ5229B,5KP11CA,P4KE6.8CA,SS515,6KP100A,SX140N10NF,P6SMB47CA,BV03C,SX15N10Y,1.5SMC250CA,PXT8050,SS510,BZX84C5V6,P6SMB220CA,SX15N10D,SX20H02S,UMH11N,BZX84C5V1,DTC144EUA,SXESDNC2FD3V3B,SX15N10S,SMDJ200CA,DTA143XCA,SMDJ190CA,SMF70A,SXESDNC2FD3V3U,P4KE20A,SX15N12D,SXTVSHC3D5VU,1.0SMB220A,SMAJ48CA,SMBJ43CA,UMH10N,SX6G04LI,1.0SMB9.1A,SMCJ7.5A,SMAJ400A,RB481K,2SC2712,2SD1664,1SMA5928A,2SC2715,2SC2714,UMZ2N,BZT52B43,SS510L,SX20H04S,SX15V04S,SMBJ18A,SS510F,MMBZ5245BW,1.0SMB350A,SX4N10LI,1.5SMC75CA,P6KE220CA,SMAJ300CA,RB480K,6KP18CA,SS520,1SMA5929A,D882,SXESDHC2FD2VB,1.5SMB68A,AZ23C5V6W,SMBJ19A,SXD02N15AI,RB480V,SX4N10MI,SXTVSHC1TF24VB,2SA1832,SX4P15DF,SMA5931B,ZUMT491,KTA1298,UMH15N,SX3404AI,P6KE100CA,SMBJ16A,SXTVSHC1TF24VU,SMBJ30CA,SX20H06S,5KP28A,SLVU2.8,SXESDNC3FD5VB,BZX584B7V5,SX260N15MP,SMF110A,SX20P04DF,6KP60A,SMA5930B,SMAJ8.5CA,SX3N50D,SMAJ180A,UMZ1N,P4KE100A,1.5SMB68CA,SX4N06AI,BZX84B2V7,SX4N10SI,UMH14N,BZX84B2V4,SMBJ17A,MMBZ5258BW,SMF85CA,MMBTA05,MMBTA06,SMBJ120CA,5.0SMDJ220A,SX25G04GD,KTA1273,DTA124EKA,SMA5933B,5KP8.0A,SXG80N10T,1.5SMC10A,DZ23C7V5,SMBJ14A,P6SMB18A,B0520LW,UMH13N,SMDJ16CA,SMBJ130A,1.5SMC130CA,5.0SMDJ350A,SS515F,DTA114TCA,SMDJ440CA,1.0SMB62A,SMA5932B,SX420N06NF,5KP120CA,SX320N04TLG5,DTA143EE,SX3404BI,SX1012,SMBJ15A,SMAJ170CA,SX2313MI,1.5SMB200CA,SX420N06MP,MMBTA55,BZX584C2V4,2SA1873,SMBJ12A,BZT52B9V1S,MMBT3904T,SMAJ6.0A,SX600N04TLG5,P6KE62CA,MMBT3904M,1.0SMB530A,MMBTA56,SX12P04D,1.5SMC91A,MMBTA43,MMBTA44,SX220N08TLG1,6KP64A,MMBTA42,SX100P01D,5.0SMDJ78A,SMCJ7.0A,1.5SMB24CA,SMDJ51CA,5.0SMDJ48CA,SMBJ13A,15KP51A,AZ23C36W,BAV99DW,AZ23C2V7,SXG80N10D,BZX584C2V7,P6KE75A,SX420N06T6,P4SMA220A,M28S,P4KE480CA,SX20H03NF,SMCJ150A,P2100SA,1.5SMB11CA,P2100SC,SX4153,MMSZ5221BS,AZ23C33W,P2100SB,HM4033,5KP8.5A,SMAJ78A,SX260N15T6,5KP120A,SX12P04S,SMBJ10A,P4KE27A,SMBJ11A,5.0SMDJ400A,SMAJ22CA,SMCJ6.5CA,SX12P05D,6KP40CA,SMAJ75A,SMCJ36A,SX8V03S,MMBTA94,15KP75CA,MMBTA92,SX100P04D,MMBTA93,SX70N30MP,6KP7.0CA,5.0SMDJ75A,P4SMA9.1A,BZT52B22,SX40P02DF,BZT52B24,SMF54CA,SXESDHC2FD4V8UF,DTA124EUA,SS54L,AZ23C39W,BZT52B27,1N4448W,1N4448X,P4SMA91A,P6SMB170A,SX4435A,SS54F,B5817WS,BZT52B20,SMF4764A,SX4435B,SX8V04S,SMCJ45CA,1.5SMB62A,15KP240CA,2SC4548,BZT52C7V5,B0520WS,SX30N06DF,P6KE75CA,P4KE24A,BZT52B33,1.0SMB68A,BZT52B36,BZT52B39,SXESDUC3FD3V3U,BZT52B30,SMF4763A,MMSZ5234BS,SMAJ6.5A,SMBJ440A,BZT52B4V3,SMCJ58CA,SX100P02D,BZT52B4V7,SXESDUC2FD3V3B,SMDJ7.5CA,SX30P02DF,1.5KE18CA,5.0SMDJ17CA,2SD2153,SS56L,SXESDUC2FD3V3U,SX2300AI,5KP60CA,5.0SMDJ70CA,SMCJ33A,SS56F,P4SMA350A,SX8V06S,SX100P03D,BZT52

选型指南 - SXSEMI - 2023/8/16 PDF 中文下载