【应用】圣邦微负压电荷泵芯片SGM3204用于叶绿素测定仪，同步输出-1.4V到-5.5V的负电压

时间： 2022-05-30 来源：世强

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在某叶绿素测定仪系统上，为了保证输出信号不失真。使用了双电源供电的运算放大器，因为系统采用电池供电(正电压)，因此需要将该正电压转换为对应的负电压。这里笔者采用了圣邦微的负压电荷泵SGM3204，主要基于如下考虑：

1、负压电荷泵芯片SGM3204，输入电压范围比较宽，从1.4V到5.5V，同步输出-1.4V到-5.5V的负电压，输出电流可达200mA，适合用于2-3节干电池或可充电锂电池供电的叶绿素测定仪。

2、负压电荷泵芯片SGM3204，采用SOT23-6封装，在使用时，外围电路很简单，只需要在输入引脚2，输出引脚1及C_FLY-3引脚与C_FLY+6引脚之间，接上3个电容，起到滤波和储能作用。这样占用的PCB板面积很小，可以降低成本，提高可靠性。

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【应用】SGMICRO负压电荷泵SGM3204YN6G/TR应用于声音分析仪，最大输出电流可达200mA

声音分析仪顾名思义是用来做声音检测及各种环境噪音记录分析，此类产品普遍使用单节锂电池3.7V的供电方式，本文介绍圣邦微推出的一款负压电荷泵SGM3204YN6G/TR应用于声音分析仪产品中为运放供电。

2022-11-30 - 应用方案代理服务技术支持现货查询批量订货

【应用】圣邦微负压电荷泵SGM3204适用于工业相机，转换效率高达80%

工业相机，主要用于工业生产制造、电力电子、轨道交通等众多领域，这类设备因为高精度和出色的稳定性要求，对器件性能也有着高要求。本文将介绍SGMICRO的电荷泵SGM3204YN6G/TR，输出负压为运放供电。

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【应用】圣邦微电荷泵DC/DC转换器 SGM3204YN6G/TR用于家用制氧机，静态工作电流为1.5mA

在制氧机中需要检测氧气的压力和大气的压力，采用压力传感器来测量。传感器信号处理链路中需要一颗高精度的运放，运放使用双电源供电，由圣邦微的SGM3204YN6G/TR提供。SGM3204YN6G/TR是一颗可输出负电压的电荷泵DC/DC转换器。

2022-11-01 - 应用方案代理服务技术支持现货查询批量订货

SGMICRO（圣邦微）信号链和电源管理芯片选型指南

描述- SGMICRO specializes in high-performance and high-quality analog and mixed-signal integrated circuits, and is committed to building a comprehensive portfolio of the highest quality analog and mixed-signal integrated circuits to address all customer needs.

型号- SGM11108M,SGM8306-2,SGM8306-1,SGM61450,SGM3733B,SGM11108E,SGM852,SGM853,SGM851,SGM5347-12,SGM2558A,SGM2558B,SGM8261-5,SGM2564,SGM8261-1,SGM5347-10,SGM8261-2,SGM2549,SGM48017C,SGM72110,SGM8094,SGM836,SGM8091,SGM837,SGM61220,SGM8092,SGM8093,SGM835,SGM72108,SGM2553,SGM72106,SGM2555,SGM809B,SGM4519,SGM4517,SGM4518,SGM48010,SGM11106C,SGM63600,SGM41611,SGM4520,SGM4521,SGM48005,SGM8417-4,SGM8417-2,SGM4051C,SGM48000,SGM48001,SGM48002,SGM3843A,SGM61433,SGM621,SGM84782,74HC574,SGM58031,SGM620,SGM862,SGM41600,SGM2572,SGM41603,SGM860,SGM2571,SGM51622H,SGM4995,SGM4511,SGM2574,SGM4996,SGM4512,SGM4510,SGM2575,SGM51622D,SGM4515,SGM8T245S,SGM4516,SGM8250-1,SGM8250-2,SGM4514,SGM3209,SGM809,SGM8557-3,SGM8557-1,SGM8557-2,SGM803,SGM61012,SGM804,SGM802,SGM61013,SGM810,SGM811,SGM61007,SGM61006,SGM4782,SGM7237B,SGM8902,SGM8903,SGM8904,SGM4542,SGM8905,SGM4548,SGM4549,SGM3699,SGM4546,SGM4547,SGM48013C,SGM62110,SGM61020,SGM62112,AAP6153A,SGM61022,SGM62111,SGM800,SGM2596,SGM3200,SGM3206,SGM8270-2,SGM3207,SGM4535,SGM3204,SGM8270-4,SGM8T245,SGM829,SGM61230,SGM42512,SGM41664,SGM825,SGM61232,SGM823,SGM61234,SGM824,SGM891B,SGM42507,SGM42506,SGM40567,SGM4560,SGM42505,SGM4561,SGM6503,SGM4566,SGM8925,SGM6502,SGM8926,SGM6501,SGM4564,SGM8927,SGM5349-16,SGM4565,SGM6505,SGM4568,SGM6504,SGM8909,SGM818,SGM890B,SGM816,SGM42501,SGM40565,SGM42500,SGM814,SGM815,SGM812,SGM40560,SGM40561,SGM821,SGM822,SGM61235,SGM820,SGM4551,SGM4552,SGM4550,SGM4555,SGM4556,SGM4553,SGM4554,SGM51652S8,SGM8910,SGM5347-8,SGM4558,SGM11124E,SGM37863A,SGM11124F,74LVC2T45,SGM893B,SGM4581,SGM8941,SGM4582,SGM4583,SGM48521Q,SGM8704,SGM4588,SGMNQ59430,SGM8705,SGM4589,SGM8706,SGM8707,SGM8942,SGM8701,SGM8702,SGM8703,SGM12213A,SGM11210A,SGM61060,SGM2050C,SGM12UB1D2,SGM892B,SGM8276-4,SGM6510,SGM4573,SGM3001,SGM4574,SGM42513,SGM6514,SGM3005,SGM6513,SGM4578,SGM8276-2,SGM3002,SGM6512,SGM42622B,SGM8276-1,SGM3003,SGM6511,SGM4576,SGM8931,SGMOP17C,SGM8932,SGM8933,SGM6516,SGM12214A,SGM8934,SGM6515,SGM11210M,SGMNE20220,74AVC8T245,SGM3141B,SGM61030,SGM42403Q,SGM42553,SGM61032,SGM61031,74HC165,SGM62116,SGM8953-1,SGM62118,SGM8953-2,SGM62117,SGM8708,SGM8709,SGM4075-2,SGM3140B,SGM61040,SGM4075-1,SGM42544,SGM7300A,SGM7300B,SGM42541,SGM42540,SGM8951,SGM8952,SGM8710,SGM4590,SGM5200,SGM38045,SGM38042,SGM6533,SGM8711,SGM8712,SGM8955,SGM38046,SGM8956,SGM2053S,SGM8199L2,LM2904,SGM8199L1,SGM41002,SGM8968-4,SGM8968-2,LM2902,SGM8968-1,SGM8740,SGM8741,SGM8742,SGM2077A,SGM8743,SGM2077B,SGM8263-1,SGM8748,SGM8263-2,SGM8417-1,SGM8749,SGM12CB1A5,SGM8744,SGM40666B,SGM8745,SGM11104S,SGM40666A,SGM8746,SGM8747,SGM41513D,SGM41513A,SGM42561,SGM42560,SGM8957-1,SGM8957-2,SGM42562,SGM5208-14,SGM5223,SGM48018C,SGM11102F,SGM11102G,SGM41512A,SGM37603A,SGM8521,SGM8522,SGM11102S,SGM33685A,SGM5018,SGM33685B,SGM33685C,SGM8524,SGM8604-1,SGM11103E,SGM8604-5,SGM8193A3,SGM11103F,SGM8604-2,SGM8193A2,SGM48019C,SGM8604-3,SGM8193A1,SGM8193A0,SGM37604A,SGM8751,SGM11103S,SGM41007,SGM41008,SGM6332,SGM8750,FT2830P,SGM11212M,SGM41280,SGM41281,SGM41283,SGM5353-16,SGM37891A,SGM41285,SGM41286,SGM7SZ244S,SGM8542,SGM51652H8,SGM8543,SGM8301,SGM8544,SGM8302,SGM8545,SGM51652H4,SGM8541,SGM8429C-4,SGM8304,SGM8607-2,SGM37892A,SGM13003A,SGM8531,SGM8773,SGM8532,SGM8534,SGM8770,SGM8771,SGM8772,SGM8535,SGM8536,SGM8537,SGM12024A,SGM8538,SGM65230,SGM37893A,SGM65231,SGM65232,SGM8969-2,SGM8969-1,SGM13002A,SGM2035C,SGM7232,SGM9128YP,SGM41291,SGM2036S,74LVC1G32Q,SGM13001C,SGM13001B,74LVC138,SGM2581E,SGM8958-2,SGM41295,SGM13001A,SGM8958-1,SGM7222,SGM6132,SGM8554,SGM7223,SGM8555,SGM7224,SGM6130,SGM8556,SGM2581C,SGM8551,SGM7220,SGM2581A,SGM8552,SGM7226,SGM7227,SGM7228,SGM7229,SGM44599,SGM8581,SGM8713A-1,SGM8582,SGM6613A,SGM8584,SGM832B,SGM41282C,SGM832A,SGM8714B-1,SGM8924A,SGM811C,SGM5355-16,SGM7SZ19,74LVC1G125,SGM48535B,SGM89000,SGM7SZ14,SGM811B,SGM48535A,SGM48752X,SGM431VB,SGM2560A,SGM37603,SGM2560B,SGM6611C,SGM15CB1A4,SGM810B,SGM41280A,SGM8591,SGM8592,SGM48753X,SGM9203,SGM6612A,SGM8594,SGM8922A,SGM4T245,SGM48753,SGM48754,SGM48755,SGM48756,SGM51242R8,SGM48757,SCM40668,SGM813B,SGM48759,74AVC4T245,SGM8140,SGM8141,SGM48751,SGM449,SGM48752,SGMNQ07430,SGMPM21330,SGM48510,SGM458,SGM3785S,SGM37864,SGM61720,SGM459,SGM37863,SGM457,SGM8142,SGM452,SGM450,SGM451,SGM05UB1B3,SGM37862,SGM37861,SGM05CB1A8,SGM05CB1A7,SGM812B,SGM05CB1A4,74GTL2005,SGM25881,SGM447,SGM448,SGM446,SGM7SZ244,SGM8478-1C,SGM51242R4,SGM8139,SGM51242R2,SGM3705,SGM48536,SGM48537,SGM48538,SGM48539,SGM5351-16,SGM2588G,SGM2588E,SGM2588K,SGM3712,SGM3713,SGM2588C,SGM3710,SGM3711,SGM2588A,SGM48522,SGM48523,SGM48525,SGM48526,SGM48760,SGMNQ07440,SGM48520,SGM48521,SGM8557-5,SGM71XX,SGM706B,SGM460,SGM3701,SGM3700,SGM3727,SGM3741B,SGM3725,SGM3726,SGMOP07,SGM898,SGM899,SGM896,SGM897,SGM895,SGM4823,SGM2566B,SGM3735,SGM3732,SGM4822,SGM2566A,SGM3716,SGM3740B,SGM48544,SGM4806,SGM3717,SGM48545,SGM3714,SGM3715,SGM4809,SGM4807,SGM3718,SGM4808,SGM3719,74LVC157,SGM48780,SGM48540,SGM48541,SGM48542,SGM48543,SGM37898,SGM51652H,SGM51652D,SGM3720,SGM37891,SGM4812,SGM37892,SGM4810,SGM37895,SGM3749,SGM3747,SGM3748,SGM72204A,SGMNQ40430,SGM

2024/6/11 - SGMICRO - 选型指南代理服务技术支持现货查询批量订货查看更多版本

SGMICRO（圣邦微）信号链和电源管理芯片选型指南

目录- Company Profile Amplifiers Comparators Data Converters Voltage References Audio/Video Drivers Analog Switches Logic Ics Temperature Sensors RF Switches Supervisory Circuits LDOs System Power Management Ics Battery Management Ics LED Drivers LCD & OLED Display Powers and Drivers Switch Mode Power Ics Application-Specific Auxiliary Powers Motor/Gate Driver Index

型号- SGM61450,SGM3733B,SGM2558A,SGM5347-12,SGM2558B,SGM8261-5,SGM2564,SGM8261-1,SGM5347-10,SGM8261-2,SGM2549,SGM48017C,SGM72110,SGM8094,SGM836,SGM8091,SGM837,SGM61220,SGM8092,SGM8093,SGM835,SGM72108,SGM2553,SGM72106,SGM2555,SGM809B,SGM4519,SGM4517,SGM48018,SGM4518,SGM48010,SGM63600,SGM4520,SGM4521,SGM48005,SGM8417-4,SGM8417-2,SGM4051C,SGM48000,SGM48001,SGM48002,SGM3843A,SGM61433,SGM84782,SGM621,SGM58031,SGM620,SGM41600,SGM2572,SGM41603,SGM2571,SGM2574,SGM51622H,SGM4995,SGM4511,SGM4996,SGM4512,SGM2576,SGM2575,SGM4510,SGM2578,SGM4515,SGM4516,SGM8250-1,SGM8250-2,SGM4514,SGM3209,SGM809,SGM8557-3,SGM8557-1,SGM8557-2,SGM803,SGM61012,SGM804,SGM802,SGM61013,SGM810,SGM811,SGM4782,SGM7237B,SGM8902,SGM8903,SGM8904,SGM4542,SGM8905,SGM4548,SGM4549,SGM3699,SGM4546,SGM4547,SGM48013C,SGM62110,SGM61020,SGM62112,AAP6153A,SGM61022,SGM62111,SGM800,SGM2553/D,SGM2596,SGM3200,SGM3206,SGM8270-2,SGM3207,SGM4535,SGM3204,SGM8270-4,SGM8T245,SGM829,SGM61230,SGM42512,SGM41664,SGM825,SGM823,SGM61234,SGM824,SGM891B,SGM832,SGM42507,SGM42506,SGM830,SGM831,SGM4563,SGM40567,SGM4560,SGM42505,SGM4561,SGM6503,SGM4566,SGM6502,SGM8925,SGM6501,SGM8926,SGM4564,SGM8927,SGM5349-16,SGM6505,SGM4568,SGM6504,SGM8909,SGM890B,SGM816,SGM42501,SGM40565,SGM42500,SGM814,SGM815,SGM812,SGM40560,SGM40561,SGM821,SGM822,SGM820,SGM4551,SGM4552,SGM4550,SGM4555,SGM4556,SGM4553,SGM4554,FT2910,SGM8910,SGM5347-8,SGM4558,SGM11124F,74LVC2T45,SGM893B,SGM4581,SGM8941,SGM4582,SGM4583,SGM8704,SGM4588,SGM8705,SGM4589,SGM8706,SGM8707,SGM8942,SGM8701,SGM8702,SGM8703,SGM12213A,SGM892B,SGM6510,SGM8276-4,SGM4573,SGM3001,SGM4574,SGM42513,SGM6514,SGM6513,SGM3005,SGM4578,SGM6512,SGM8276-2,SGM3002,SGM42622B,SGM6511,SGM8276-1,SGM3003,SGM4576,SGMOP17C,SGM6518,SGM8931,SGM8932,SGM6516,SGM12214A,SGM8933,SGM6515,SGM8934,74AVC8T245,SGM3141B,SGM42553,SGM61031,SGM62116,SGM62115,SGM8953-1,SGM62118,SGM8953-2,SGM62117,SGM8708,SGM8709,SGM4075-2,SGM3140B,SGM4075-1,SGM42544,SGM7300A,SGM7300B,SGM42541,SGM42540,SGM8951,SGM8710,SGM8952,SGM5200,SGM38045,SGM38042,SGM6533,SGM8711,SGM8712,SGM8955,SGM38046,SGM8956,SGM8199L2,LM2904,SGM8199L1,SGM41002,SGM8968-4,SGM8968-2,LM2902,SGM8968-1,SGM8740,SGM8741,SGM8742,SGM8743,SGM8263-1,SGM8748,SGM8263-2,SGM8417-1,SGM8749,SGM8744,SGM40666B,SGM8745,SGM40666A,SGM8746,SGM8747,SGM41513D,SGM41513A,SGM42561,SGM42560,SGM8957-1,SGM8957-2,SGM42562,SGM5208-14,SGM5223,SGM48018C,SGM11102F,SGM41512A,SGM37603A,SGM8521,SGM8522,SGM5018,74LVTN16244,74LVTN16245,SGM8524,SGM8604-1,SGM11103F,SGM8193A3,SGM8604-5,SGM8193A2,SGM8604-2,SGM48019C,SGM8193A1,SGM8604-3,SGM8193A0,SGM37604A,SGM8751,SGM41007,SGM41008,SGM6332,SGM8750,SGM41280,SGM41281,SGM41283,SGM5353-16,SGM37891A,SGM41285,SGM41286,SGM8542,SGM51652H8,SGM8301,SGM8543,SGM8302,SGM8544,SGM8545,SGM51652H4,SGM8541,SGM8429C-4,SGM8304,SGM37892A,SGM8531,SGM8773,SGM8532,SGM8774,SGM8534,74LVTH125,SGM8770,SGM8771,SGM8772,SGM8535,SGM8536,SGM8537,SGM8538,SGM65230,74LVC2G04,SGM37893A,SGM65231,74LVC2G08,SGM65232,SGM8969-2,SGM8969-1,SGM2035C,SGM7232,SGM9128YP,SGM41291,SGM2036S,74LVC1G32Q,74LVC2G14,SGM13001C,SGM13001B,SGM2581E,74LVC138,SGM8958-2,SGM41295,SGM13001A,SGM8958-1,SGM7222,SGM6132,SGM8554,SGM7223,SGM8555,SGM7224,SGM6130,SGM8556,SGM2581C,SGM7220,SGM2581A,SGM8551,SGM8552,SGM7226,SGM7227,SGM7228,SGM7229,SGM44599,SGM8581,SGM7SZ32,SGM8713A-1,SGM8582,SGM6613A,SGM8584,SGM41282C,SGM8714B-1,SGM8924A,SGM58XXX,SGM5355-16,SGM7SZ19,74LVC1G125,SGM89000,SGM811B,SGM7SZ14,SGM48752X,SGM431VB,SGM2560A,SGM37603,SGM2560B,SGM6611C,SGM810B,SGM7SZ08,SGM7SZ04,SGM8591,SGM7SZ00,SGM8592,SGM9203,SGM6612A,SGM8594,SGM8922A,SGM4T245,SGM48753,SGM48754,SGM48755,SGM48756,SGM48757,SGM813B,SGM48759,74AVC4T245,SGM8140,SGM8141,SGM48751,SGM449,SGMNQ07430,SGM48752,SGM48510,SGM458,SGM3785S,SGM459,SGM457,SGM8142,SGM452,SGM450,SGM451,SGM37862,SGM37861,SGM812B,74GTL2005,SGM447,SGM448,SGM446,SGM7SZ244,SGM8478-1C,SGM7SZ245,SGM8139,SGM48537,SGM48538,SGM48539,SGM5351-16,SGM2588G,74LVCN16373,SGM2588E,SGM61032A,SGM2588K,SGM61032B,SGM2588I,SGM3712,SGM2588C,SGM3713,SGM3710,SGM2588A,SGM3711,SGM48523,SGM48524,SGM48525,SGM48526,SGM48760,SGM48520,SGM8557-5,SGM71XX,SGM706B,SGM3700,SGM3727,SGM3741B,SGM3725,SGM3726,SGMOP07,SGM898,SGM899,SGM896,SGM897,SGM895,SGM61030A,SGM61030B,SGM2566B,SGM4823,SGM3735,SGM3732,SGM2566A,SGM4822,SGM3716,SGM3740B,SGM4806,SGM3717,SGM3714,SGM3715,SGM4809,SGM4807,SGM3718,SGM4808,SGM3719,74LVC157,SGM48780,SGM48540,SGM37898,SGM51652H,SGM3720,SGM37891,SGM4812,SGM37892,SGM2567A,SGM4810,SGM37895,SGM3749,SGM3747,SGM3748,74LVTH16244,SGM72204A,SGMNQ40430,SGM432,74AHCT86,SGM431,SGM3752,SGM3753,SGM3750,SGM3756,SGM3757,SGM3755,SGM3738,SGM4825,SGM3736,SGM4826,SGM7SZ86,SGM3851A,SGM8198,SGM3741,SGM660,SGM3740,SGM3743,SGM41562B,SGM724,SGM72112B,SGM5209-14,SGM72112A,SGM2200,SGM4863,SGM2202,SGM2201,SGM2204,SGM2203,SGM2206,SGM4865,SGM2205,SGM3758,SGM3759,SGM8416-4,SGM722,SGM723,SGM721,SGM3760,SGM72004B,SGMNM45412,SGM8295-2,SGM8295-4,SGM8480-2,SGM2523C,SGM2523D,SGM2523A,SGM8295-1,SGM2523B,SGM3766,SGM4040B,SGM790A,SGM330A,SGM790B,SGM790C,SGM41100A,SGM41100V,SGM41100W,SGM2220,SGM8262-2,SGM8416-1,SGM2221

2023/4/7 - SGMICRO - 选型指南代理服务技术支持现货查询批量订货

SGMICRO DC/DC转换器选型表

SGMICRO DC/DC转换器选型表包含包含同步整流降压转换器、AMOLED显示屏电源降压、非同步降压转换器升压、同步整流升压转换器、非同步升压转换器、电荷泵DC/DC转换器、专用DC/DC转换器和LCM偏置电源；升降压、电荷泵供电，最大输入电压60V，最大开关电流10A，内置MOS。

产品型号	品类	CH	Enable	Vcc (Min)(V)	Vcc (Max)(V)	I_OUT(mA)	Frequency (kHz)	Iq (μA)	SHDN Iq(μA)	Package
SGM6010	DC/DC Synchronous Rectifier Buck Converters	1	L	3	5.5	3000	300 to 2000	0.41	2	TDFN-3×3-10L

选型表 - SGMICRO 立即选型

SGM3204YN6G/TR PcbLib & SchLib & IntLib

型号- SGM3204YN6G/TR

2024/1/16 - SGMICRO - CAD模型库代理服务技术支持现货查询批量订货

SGMicro（圣邦微） SGM3204 数据手册

型号- SGM3204YN6G/TR,SGM3204

2017年04月24日 - SGMICRO - 数据手册 - Rev.A 代理服务技术支持现货查询批量订货

【经验】电荷泵电压反相器SGM3204在3.6V锂电池供电感应式电阻检测装置正弦波发生器中的负压发生器的应用

我公司研发制作感应式电阻检测装置，通过线圈之间的互感检测回路电阻值，因此需要产生正弦波以激励线圈产生感应电流，正弦波的产生需要使用到+3.3V和-3.3V的电压等级。由于设备采用锂电池供电因此需要一款DC-DC来将正压转换为负压以便产生正弦波。世强代理的圣邦微电子推出一款电荷泵电压反相器SGM3204可以将+3.3V转换为-3.3V，完美解决正负的问题。

2018-09-22 - 设计经验代理服务技术支持现货查询批量订货

SGM3204 Unregulated 200mA Charge Pump Voltage Inverter

型号- SGM3204YN6G/TR,SGM3204

NOVEMBER 2021 - SGMICRO - 数据手册 - REV.A.1 代理服务技术支持现货查询批量订货查看更多版本

【选型】国产DC-DC电压逆变器可兼容LM2776DBVR，助力无人驾驶领域激光雷达市场

在当今大热的无人驾驶领域，激光雷达应用很广泛，在实际项目中，有客户做激光雷达用于低速无人驾驶技术整体解决方案，之前一直用LM2776DBVR做电压逆变器，本文推荐圣邦微DC-DC电压逆变器SGM3204YN6G/TR兼容LM2776DBVR，实际测试表现优异。

2022-04-27 - 器件选型代理服务技术支持现货查询批量订货

请问有没有国产的正压转负压电源芯片？

推荐国产圣邦微充电棒DC/DC 转换芯片SGM3204、SGM3206、SGM3207、SGM3209，详细电性参数参考如下图示：

2019-05-17 - 技术问答代理服务技术支持现货查询批量订货

【经验】电压反相器SGM3204/SGM3206用于光模块EML，输出电流最高达200mA并满足其小型化需求

光模块中的EML是电吸收调制器（EAM）和DFB激光器组成的集成器件，在该系统中的EAM需要外加方向电压才能正常工作，电流约为50mA左右。而光模块的供电电压是3.3V，所以需要能产生负压的电源芯片。圣邦微推出的电荷泵SGM3204和SGM3206工作电压1.4~5.5V，输出电流分别为60mA和200mA，输出为-Vin，满足光模块中EAM的参数需求。

2020-03-14 - 设计经验代理服务技术支持现货查询批量订货

【应用】电压泵DCDC SGM3204+LDO SGM2036组合方案，极简电路即可实现5V转-3.3V方案设计

圣邦微的电荷泵DCDC SGM3204+LDO SGM2036的组合方案，将LDO放在前级，将输入的5V电压转为3.3V输出，然后电荷泵DCDC放在LDO后级，做3.3V转-3.3V的转变，这样就可以用最简易的电路实现5V转-3.3V设计。整个方案外围器件简单，电路面积小，方案成本低。

2020-02-23 - 应用方案代理服务技术支持现货查询批量订货

max889T国产替代型号，或功能替代推荐

推荐国产圣邦微品牌电荷泵芯片：SGM3204，输入电压1.4V-5.5V，输出电流200mA，输出为-VIN，输出电压不可调。请评估。SGMicro（圣邦微） SGM3204 数据手册

2019-11-04 - 技术问答代理服务技术支持现货查询批量订货

设计记录仪项目，使用MAX660ESA，实现5V到-5V，现在降成本找替代设计，请帮推荐合适型号？

请参考圣邦微电荷泵DC/DC, SGM3209 Iout 100mA, SGM3204 Iout 200mA；以SGM 3209 为例，数据手册 https://www.sekorm.com/doc/1568118.html SGM3209电荷泵电压转换器的特点： · 工作范围宽：3V至18V · 输出电流：100mA · EN引脚的下拉电阻为600kΩ · 120kHz至1.25MHz的可调节振荡器频率 · 不需要外部二极管 · 输出阻抗低：15Ω（典型值）@IOUT = 20mA · CMOS构造 · 工作温度范围：-40℃至+85℃ · 采用TDFN-2×2-8L和SOIC-8绿色环保封装