【应用】国产线性稳压器LP3994用于智能感应垃圾桶，1.5uA超低功耗电流，宽电压输入范围支持3.6-40V

时间： 2023-06-14 来源：世强

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智能感应垃圾桶是一种能够自动识别和分类垃圾的垃圾桶。它使用传感器技术，通过检测垃圾的重量、形状和颜色等特征，自动将垃圾分为可回收物、有害垃圾和其他垃圾三类。同时，智能感应垃圾桶还可以自动压缩垃圾，减少垃圾桶的占用空间，提高垃圾桶的容量。智能感应垃圾桶可以实现垃圾分类的自动化和智能化，有助于减少环境污染和提高垃圾处理效率。

本文主要介绍微源半导体线性稳压器 LP3994在智能感应垃圾桶的应用情况，下图为该项目的简易原理框图：

微源半导体线性稳压器LP3994用在该项目中主要有以下特点：

1、宽输入电压支持3.6V至40V，最大负载电流高达150mA

2、内置热过载保护，超低静态电流，典型值可以做到1.5μA

3、芯片采用SOT23-3、SOT23-5和SOT89-3三种形式封装，满足Rohs要求

综上所述，微源半导体推出的线性稳压器LP3994非常适合用于该类场景的应用，且国产厂牌在价格和交期方面都有一定优势。

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由于二轮电动车的主控MCU一般采用3.3V电压供电，因此需要用到低压差线性稳压器LDO，将DCDC输出的12V电压转换成3.3V给MCU供电，本文推荐使用微源半导体的高性能线性稳压器LP3993B-50X3F，它的输入电压高达28V，固定输出5V，输出电流仅0.2A，完全符合电动二轮车的供电需求。

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有客户在设计两轮车BMS时，需要给BMS选择一颗低功耗的LDO。根据上文所指出的需求，我们推荐了微源高性能低压差LDO稳压器LP3994，耐压值可达40V，满足最高8节锂电池串联供电应用，静态电流IQ低至1.5μA。

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目录- 公司简介电源芯片协议芯片音频功放 MOS管

型号- LP5300C,LP7854A,LP5300F,LPB1001,LP6281,LPB1002,LP6282,LP6283,LP6284,LP7800HA,LP6285,LP7800HB,LP6286,LPM9030A,LP28400A,LP28303A,LP5301A,LP6452AF,LP6270,LP3352T,LPB1009,LP6304B,LP6452AT,LPB1006,LPB1003,LP7864H,LP5300A,LP7852A,LP78073A,LPA4722,LP4069HT,LPM9040A,LP6299,LPB2105,LPB2106,LPA4732,LP6291,LP6294,LP6295,LP6296,LP6298,LP6288,LP6289,LP28058,LP6453AT,LPM8205,LP28055,LP28056,LP3803,LP78070F,LP78070S,LP3809,LP3808,LP6215A,LPM9435,LP3818C,LPA4809,LP6226A,LP64920F,LP28021,LP3811,LP3810,LP6212A,LP28013,LP28014,LP28011,LP4068T,LP6453F,LP6453A,LPA2010,LP4068H,LP4056H,LPM9926,LP6453T,LP4069T,LP6452F,LP6452A,LP4021A,LP4069H,LPB1010H,LP4069P,LP4069PT,LP28013S,LP3989,LP3988,LP6451F,LP3986,LP3985,LP28013H,LP3984,LP3981,LP3980,LP6221A,LP28014A,LP4030HA,LPA2153,LP4030HB,LPA2154,LP28014H,LP4054H,LP4030HC,LP4030HD,LP7806K2,LP4067T,LP28014S,LP6462H,LP7806K4,LP6450F,LP6498H,LP6220A,LP6498A,LP4068A,LP6498B,LP4055A,LPA2163,LPA2164,LPA2165,LPA2010S,LP28015A,LPA2160,LPA2161,LP28019S,LPA4990,LPA4871,LP4076E,LP4076H,LP105,LP6230B,LP3996,LP3995,LP3994,LP6230C,LP3993,LP3992,LP3991,LP28300C,LP28300B,LP28300A,LPA2100,LPA2101,LPA2102,LPA2103,LP7855XA,LP28009A,LP102,LP3307,LP6253H,LP3302,LP3301,LPA2108,LPA4891,LPA4890,LPA2110,LP4062A,LP3988H,LP6495*,LP2206,LP4063S,LP1115,LP4051T,LP2203,LP1113,LP2202,LP2201,LP1111,LP1110,LP6470T,LP28019B,LP3209,LP6493F,LP3204,LP4060S,LP3202,LP3201,LP3321,LP3320,LP7855SH,LP28601,LP4060A,LP7801,LP102A,LP4072H,LP3318,LP6492F,LP3317,LP3986H,LP3316,LP3315,LPA2101A,LP3310,LP28057A,LP28021A,LP6453TF,LP28021D,LP64933,LP3987H,LP4073H,LPM3413,LPM3414,LP6261H,LP3983H,LP5280S,LP3983S,LP6297B,LP6452ATF,LP3102,LP3101,LP3100,LP103S,LP6297A,LP3220,LP103Q,LP3350,LP6261S,LP4070E,LP78080,LP6490F,LP3219,LP3218,LPM3407A,LP3211,LP7811,LP6260S,LP7810,LP7813,LP7815,LP62610,LP78070,LP78071,LPS100,LP6260M,LP4080H,LP3981H,LP3368,LP28011H,LP3366,LP3120,LPW5210,LPW5211,LPA2173,LPA2174,LPW5213,LP5300,LPA2175,LP5301,LPA2176,LP5302,LP5303,LP3981S,LP5304,LP5305,LP5306,LP5308,LP5309,LPA2171,LPA2172,LP3982S,LP28014SE,LP3354,LP3353,LP3352,LP3110,LPW5220,LP3351,LP28013A,LP7804T,LP4081H,LP7801TE,LP28021S,LPA2110A,LP28021H,LP7855MF,LP3384,LP28021HD,LP7862,LP7861,LP7864,LP7863,LP28058F,LP7866,LP3390,LP7865,LP7867,LP1115B,LP1115A,LP3980H,SUPER22,LP6280A,LP7860,LP3383,LP7850,LP3382,LPW5201,LP7853,LP6400,LP7802T,LP7852,LP3380,LPW5203,LP7855,LP7855MH,LP6402,LPW5204,LP6403,LP6280S,LPW5206,LP7856,LP3980S,LPW5207,LP7859,LP3993B,LPW5208,LP7858,LPW5209,LP5308M,LP4020,LP7801T,LP6310,LP6312,LPM9007,LP7801L,LP6291H,LP7801D,LP3990A,LPA4722A,LP7800S,LP6301,LP6401F34,LP6302,LP6303,LP7812B,LP7812C,LP7812A,LPM9030,LPM9031,LP4040,LP6460,LP6461,LP6342,LP6453,LPM9026,LP6212,LP6454,LPM9022,LP6216,LPM9024,LP6218,LP1111A,LP7859A,LPM9021,LP3201S,LP4030,LP6450,LP5240,LP6451,LP5241,LP6452,LPM9015,LP6201,LPM9017,LPA8003S,LP7810A,LPW5202XX,LP53050,LP4060,LP6480,LP4061,LP6240,LP6482,LP4063,LP6483,LP4065,LPA2104A,LPM9050,LP4055,LP4057,LP6235,LP6236,LP4059,LP6238,LP6239,LP7857M,LP5305A,LPA2104S,LPM4953,LP7857H,LP5305F,LPM9040,LP5380,LPM9042,LP6470,LP4051,LP28052H,LP6471,LP4052,LP4053,LPM3401A,LP6222,LP6223,LP6224,LP6225,LP28053A,LP6226,LPM9033,LP6229,LP5304A,LP5304C,LP7820A,LPM3406,LPM3407,LP4081,LP4082,LP6260,LP6261,LP4077,LP7855S,LP6255,LP6497,LP4078,LP6256,LP3220S,LP6257,LP6401F24,LP7855M,LPM9029C,LPM3400,LPM3401,LP5303A,LP3100A,LP5301F,LP4070,LP6490,LP5280,LP6491,LP4072,LP6492,LP4073,LP6493,LP4074,LP6252,LP6494,LP4075,LP4076,LP6496,LP4066,LP4067,LP7854S,LP4068,LP4069,LP7854H,LPM2301,LP7800K4,LP5314A,LPM2302,LP7800K2,LP3367A

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目录- 公司简介电源芯片音频功放 MOS管协议/转换芯片

型号- LP5300C,LP7854A,LP5300F,LPB1001,LP6281,LPB1002,LP6282,LP6283,LP6284,LP6285,LP6286,LPM9030A,LP406 5,LP28400A,LP28303A,LP3352T,LPB1009,LP6304B,LPB1006,LPB1003,LP7852A,LP78073A,LPA4722,LPM9040A,LP6299,LPB2105,LPB2106,LPA4732,LP6291,LP6294,LP6296,LP6298,LP6288,LP6289,LPM8205,LP28055,LP28056,LP3803,LP78070F,LP28009,LP78070S,LP3809,LP3808,LP6215A,LPM9435,LP3818C,LPA4809,LP2802A,LP64920F,LP28021,LP2801H,LP3811,LP3810,LP2801A,LP28013,LP28014,LP28011,LP6453A,LPA2010,LPM9926,LP4069P,LP28013S,LP3989,LP111 5,LP3988,LP111 3,LP3986,LP3985,LP28013H,LP3984,LP3982,LP6291 H,LP3981,LP3980,LP6221A,LP28014A,LP4030HA,LPA2153,LP4030HB,LPA2154,LP398H,LP4054H,LP4030HC,LP4030HD,LP28014S,LP1 140,LP6498H,LP6220A,LP6498A,LP6498B,LP4055A,LPA2163,LPA2164,LPA2165,LP28015A,LPA2160,LPA2161,LP28019S,LPA4871,LP4076H,LP105,LP6230B,LP3996,LP3995,LP3994,LP6230C,LP3993,LP3992,LP3991,LP11 1 0,LP28300C,LP28300B,LP28300A,LPA2100,LPA2101,LPA2102,LPA2103,LP102,LP3307,LP6253H,LP3302,LP3301,LPA2108,LPA4890,LPA2110,LP4062A,LP3988H,LP2206,LP4063S,LP2203,LP2202,LP2201,LP1111,LP6470T,LP28019B,LP3209,LP6493F,LP3204,LP4060S,LP3202,LP3201,LP3321,LP3320,LP1150,LP28601,LP7801,LP7804,LP102A,LP3318,LP6492F,LP3317,LP3986H,LP3316,LP3315,LPA2101A,LP1131,LP3310,LP1130,LP28057A,LP28021D,LP64933,LP3987H,LPM3413,LPM3414,LP6261H,LP3983H,LP3983S,LP6297B,LP3102,LP3101,LP3100,LP103S,LP3220,LP6297A,LP103Q,LP3350,LP6261S,LP78080,LP3219,LP3218,LPM3407A,LP3211,LP28058/F,LP7811,LP6260S,LP7810,LP78072,LP62610,LP78070,LP78071,LPS100,LP4080H,LP3981H,LP530A,LP1115/A,LP3368,LP3366,LP3120,LPW5210,LPW5211,LPA2173,LPA2174,LPW5213,LP5300,LPA2175,LP5301,LPA2176,LP5302,LP5303,LP3981S,LP5304,LP5305,LP5306,LP5308,LP40 56H,LPA2171,LPA2172,LP28014SE,LP3354,LP3353,LP3110,LPW5220,LP3352,LP3351,LP7804T,LP7801TE,LP28021S,LPA2110A,LP28021H,LP3384,LP3390,LP1115B,SUPER22,LP6280A,LP3383,LP7850,LPW5201,LP3382,LP7853,LP6400,LPW5202,LP7802T,LP7852,LPW5203,LP3380,LP7855,LP6402,LP6403,LP6280S,LPW5206,LP3980S,LPW5207,LP3993B,LPW5208,LPW5209,LP7802A,LP4020,LP7801T,LP6310,LP6312,LPM9007,LP7801L,LP7801D,LP3990A,LP7800S,LP6301,LP6401F34,LP6302,LP6303,LP621A,LPM9030,LPM9031,LP4040,LP6460,LP6461,LP6342,LP6453,LPM9026,LP6212,LPM9022,LP6216,LPM9024,LP6218,LP7854HA,LP402L,LPM9021,LP3201S,LP4030,LP5240,LP6451,LP5241,LP6452,LPM9015,LP6201,LPM9017,LPA8003S,LP53050,LP4060,LP6480,LP4061,LP6240,LP6482,LP4063,LP6483,LPA2104A,LPM9050,LP4055,LP4057,LP6235,LP6236,LP4059,LP6238,LP6239,LP5305A,LPM4953,LP5305F,LPM9040,LP28021 S,LP5380,LPM9042,LP6470,LP28052H,LP6471,LP4052,LP4053,LPM3401A,LP6222,LP6223,LP6224,LP6225,LP28053A,LP6226,LPM9033,LP6229,LP5304C,LP622A,LP7820A,LP407H,LPM3406,LPM3407,LP1130A,LP1130B,LP78006K2,LP4070/E,LP78006K4,LP6260,LP6261,LP4077,LP7855S,LP6255,LP6497,LP4078,LP6256,LP3220S,LP6257,LP6401F24,LPM9029C,LPM3400,LPM3401,LP5303A,LP3100A,LP407E,LP649F,LP406H,LP4021 A,LP5301F,LP6490,LP5280,LP6491,LP4072,LP6492,LP4073,LP6493,LP4074,LP6252,LP6494,LP406T,LP4075,LP6495,LP6496,LP4066,LP4067,LP4068,LP4069,LPM2301,LP406A,LP7800K4,LPM2302,LP7800K2,LP3367A

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提供低压LDO芯片、高压LDO芯片,最高电压支持44V,静态电流低,精度最高可达1%

产品型号	品类	输出电流(mA)	PSRR(dB)	静态电流(uA)	输出电压(V)	输入电压(V)	精度(%)	导通压差(mV/mA)	封装
LP3981	LV LDO	300mA	-63dB	45uA	1.2V/1.5V/1.8V/2.5V/2.8V/3.0V/3.3V/Adj.	2.5V-5.5V	2%	220mV@300mA	SOT23-5/DFN-4(11)/DFN-6(22)

选型表 - 微源半导体立即选型

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型号- LP4080H,LP4068T,LP5300F,LPB1001,LP781X系列,LP7800HA,LP7800HB,LP7801T,LP408X,LP5301,LP7802,LP5305,LP7804,LP5306,LP7801L,LP4076H,LP5308,LP5305A,LP28303A,LP7801D,LP4069T,LP3996,LP3994,LPB1010,LP7800S,LP28300A,LP7804T,LPB1003,LPB,LP7812B,LP7812C,LP7812A,LP7801TE,LP4080,LP4081,LP6260,LP408X系列,LP6261,LPS,LP4077,LP78202T,LPM3401,LP4070E,LP781X,LP7806K2,LP5301F,LP7806K4,LP6252,LP4076,LP78111,LP4068,LP4069,LP7811,LP7810,LP7813,LP7812,LP4067H,LPM2301,LPM2302

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TWS耳机

型号- LP4080H,LP7812B,LP4068T,LP7812C,LP7812A,LPB1001,LP4081,LP6260,LP6261,LP4077,LP5300,LP5301,LP4076E,LP5305,LP7806,LP5308,LP5309,LP28303A,LP4069T,LP3996,LP3994,LP3993,LP7801X,LP4030,LP6252,LP4076,LP4068,LP7802T,LP28300A,LP7811,LP7810,LP7804T,LPB1003,LP7812,LPB1010H,LP7800H

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电子烟

型号- LP4060,LP4061,LP7855X,LP6221A,LP7862,LP7861,LP28300,LP7864,LP7863,LP7866,LPB2105,LP7865,LP6216,LP7868,LP7867,LP7857M,LP28013X,LP28021X,LP5308,LP5309,LP7859A,LP4030HX,LP3994,LP3993,LP4073,LP4030,LP7860,LPM3401A,LPM9015,LP7853,LP4068,LP7854,LPB1006,LPB1003,LP7856,LP7858,LP7855XA,LP7864H

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LP3994 Wide Input Range High Performance LDO Datasheet

型号- LP3994-33B5F,LP3994B-33X3F,LP3994-33B3F,LP3994-XXX3F,LP3994-33X3F,LP3994-XXB3F,LP3994B-XXX3F,LP3994,LP3994-50X3F,LP3994-XXB5F,LP3994□□□□□,LP3994B-50X3F,LP3994-50B5F,LP3994-50B3F,LP3994B

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型号- LP3981-33QVF,LP3981-25B3F,LP3981-□□□□□,LP3981-28B5F,LP3981,LP3981-25B5F,LP3981-12QVF,LP3981-30QVF,LP3981-18QVF,LP3981-28B3F,LP3981-15QVF,LP3981-12B3F,LP3981-05,LP3981-12B5F,LP3981-30B5F,LP3981-18B3F,LP3981AB5F,LP3981-28QVF,LP3981-30B3F,LP3981-33B3F,LP3981-33B5F,LP3981-18B5F

Jul.-2022 - 微源半导体 - 数据手册代理服务技术支持批量订货查看更多版本