最大输出电流7A的DC-DC同步降压转换器ME3114，具备高精度电压基准0.6V±1.5%

时间： 2024-01-01 来源：MicrOne（微盟电子公众号）

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MicrOne推出的ME3114是一颗DC-DC同步降压转换器，其输入电压范围为4V～18V，输出电压在0.6～12V范围内可调，最大输出电流可达7A。具有高精度电压基准：0.6V±1.5%，可以解决对供电稳定度要求高的设备供电问题。

本篇主要介绍ME3114的产品特性、优势以及应用场景。

ME3114典型电路图

产品特性

1. 频率可调

连接RT管脚与参考地之间的电阻可以设定开关频率，开关频率范围200kHz至1.6MHz，设定开关频率可以参考如下公式：

芯片也支持使用外部方波时钟信号设定开关频率，在此模式下，芯片内部PLL将开关频率同步到外部时钟频率，并且开关节点SW的上升沿与外部时钟的下降沿保持同步。

频率设置200kHz

频率设置500kHz

频率设置1600kHz

2. 可调软启动，支持预偏置输出

软启动电容上的控制电压上升至0.6V，输出电压也跟随上升至设定的电压，这样可以避免启动时较大的突入电流和输出电压过冲，软起动的时间设定可以参考如下公式：

其中，C_SS为软起动电容，I_SS为软起动充电电流（I_SS约2.2μA）

软启动过程（V_IN=12V，V_OUT=3.3V，I_OUT=3A）C_SS=10nF

3. 全带载范围内超小纹波20mV

ME3114工作在PWM模式下，全带载范围内均可实现超小纹波，输出纹波在20mV。

开关波形（V_IN=12V，V_OUT=3.3V，I_OUT=0A）

4. 快速负载响应

输出电压上冲144mV，输出电压下冲116mV@ I_OUT：2A-6A

测试条件：V_IN=12V，V_OUT=3.3V，I_OUT：2A-6A，R1=30k，C2=0.47nF

负载瞬态响应（V_IN=12V，V_OUT=3.3V，I_OUT：2A-6A）

5. PGOOD针对输出欠压及过压的监控

PGOOD引脚具有输出状态指示功能，方便配合灵活的系统设计，此引脚通过检测FB电压来指示输出状态。对于PGOOD管脚，只需要加一个上拉电阻（100K左右），再加5V左右的上拉电压。

当VFB引脚电压小于参考电压Vref的92%或大于107%时，PGOOD引脚被拉低，当VFB引脚电压为Vref的94%至105%时，则该引脚被拉高。

当芯片处于过温保护、过压保护、EN接逻辑低或者软启动期间此管脚电压均会被拉低。

PGOOD指示输出电压状态，当VFB值达到预设值是，内部设置了约2ms的延迟时间。

通过使用使能输入（EN）和PGOOD信号延迟，可以对两个或更多电源进行电源时序控制。

PGOOD延迟时间

ME3114主要优势

1. 高效率

Vout=3.3V，V_IN=5V，I_OUT在1A~7A时，芯片效率能达到90%以上，效率最高能达到95%。

2. 高可靠性

ME3114设置逐周期限流保护：10A峰值限流可在过载情况下保护器件不受损害，8A谷值限流也可防止电流失控。此外，低压侧开关也有一个-3.5A的下降电流限制，当反向电流过大时，该限制会将其关闭。除了上述功能，还集成过温保护、输入欠压锁定、输出短路保护等功能来提升芯片的可靠性。

3. 外围模块高集成化

ME3114兼具大电流、高效率以及低Rdson，使其外围模块高集成化，并针对高密度应用进行了优化，外部元器件较为简单。ME3114开关频率是0.2MHz~1.6MHz,，可以选择高达1.6MHz的高开关频率，这样可以搭配较小的电感和电容，可以应用于需要小尺寸的方案，节省PCB板空间。

应用场合

ME3114提供18V/7A大电流解决方案，芯片兼具高效率、高稳定性以及外围模块高集成化，非常适用路由器、机顶盒、蓝光播放器、车载转接头、数字电视电源、笔记本电脑、以及各种高性能稳压器等。

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本文由Vicky转载自MicrOne（微盟电子公众号），原文标题为:ME3114的产品特性、优势以及应用，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。

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型号- TMI3112H

2022.11 - 拓尔微电子 - 数据手册 - V1.1 代理服务技术支持采购服务

【选型】应能微TVS/半导体放电管/MOSFET/电源管理IC(PMIC)/过压保护设备(OVP)/DC-DC同步降压转换器选型指南

目录- 公司简介 TVS 半导体放电管 MOSFET 电源管理IC(PMIC) 质量管理体系、RoHS认证证书

型号- P4SM6.8CA-200A,CM2302C,CM2302B,CM2302A,AU3321D5,SMDJ5.0CA-220CA,SMAJ5.0A-550A,SMF5.0A-220CA,CM3416E,3.0SMC6.8CA-250CA,AU1801P1,CM3134EW,CM3404B,CMN3018S8,AR0501S2,CM2301G,AU1221P1,AU1221P0,CM2301C,CM60N10AGB,CM2301B,CM2301A,AR0534P3,CMP2033S8,AR0521M0,AR0521M1,CMN6075S9,S4MP5.0CA-170A,1.0SMBJ6.8CA-530A,P4SM6.8A-200CA,ASD08C,5.0SMDJ11A-220A,AR0501P0,CMN2006F3,CMN6009S8,CM65R360_F,AU0701D5,ASD12,ASMBS10A-43A,AR0524P5,AU2401D5,AR0501P1,AU0771P1,CMN3205B,1.5SMC6.84-600A,AR1203P3,SMBJ5.0A-550CA,CM65R360_P,CM60R2K2_D,5.0SMDJ11CA-220CA,SMCJ5.0A-550A,3KP5.0A-220A,AST05,CM05N50U,CMN251R0F5,AU0541P1,ASD08,AR0502S2,AR0502S1,AU2581P1,CM60R2K2_U,CMO4N65U,CMO4N65P,ASD05,ALCDA15C-1,3KP5.0A-220CA,AR0502S5,ASD12CL,CMN2006U,AR0541D3,5KP5.0A-220CA,CMO4N65F,P4SMA6.8A-600CA,CMO4N65D,P4SMA6.8CA-600CA,SMBJ5.0CA-550A,1.5SMB6.8CA-250A,AU1231P1,S4MP5.0A-170A,5.0SMDJ11CA-220A,AR0502P6,CM9435,AR0502P1,AR0502P2,AU0521P1,ASD24CL,AU0521P0,15KP5.0A-220CA,SMBJ5.0CA-550CA,AU0761M1,AU0761M0,AU3381P1,AU0861P0,AU1232S5,CM65R850_F,CMN3205P,CM65R850_P,AU3611P1,CM2305B,CM2305A,AU0561D5,CM2N7002DW,AU0522S2,ASD36CL,AU0581P1M,AU1501D5,3.0SMC6.8A-250A,AU0581P1H,AU1811P1,AU2881D3,SMB6.8A-250CA1.5,AR3311D3H,ASD05L,AU0521PZ,P4KE6.8A-600A,CM2304A,ASD05C,CM65R850_U,AR1201P1,CM60R150_F,CM60N10AGP,CM60R150_K,AU0533S1,P6KE6.8A-600A,AUO811P1,AR0504S6,AU1221P1L,SMB15.J5.0A-180CA,P6SMA6.8CA-440CA,AR0504S2,AR0504S3,AU0531P1,AU0521S5,AU3304P7,CM1601,CM1602,CM3415E,ASM05C,CM2N7002,CM2324,P6SMA6.8A-440A,CM2326,ASM05H,AU1204S2,ASD15CM,CMN3013F3D,P4SM6.8CA-200CA,1.5KE6.8A-600CA,CMBSS84,AR2504P9,AU3311P0,P6SMB6.BA-600CA,AR2504P8,AU1881P1,AU3311P1,AU0771D5,CM3400,CM2310,AR2504P3,ASD24L,ASD12L,CM2312,CM3401,ASD36L,ASD12C,AU3351D5,AU2512PT,AU1231D5,AU0511P0,AU0521M0,AU0511P1,ASD36C,AU0524S2,ASD24C,CM2615E,AR3354S2,AU0521M1,SMDJ5.0CA-220A,CM3407,CM100N15GB,LC03-3.3,ALCA24C-1,AU0511PF,AU0551D5,CM2616E,AU0522P1,ALCDA12C-1,CMN3003B,1.0SMBJ6.8CA-530CA,CM2N7002K,SMDJ5.0A-220A,CM8205S,CM4407,AR0531P1,AU1201P0,AU1201P1,ASD05CL,AR0554P3,AR1211P1,AR2411D3,ASM1235,AU3321P0,ASR3.3,S4MP5.0CA-170CA,CM40P03U,AU3321P1,AR0521P1,AR0534S2,AR0511S1,AU0531D5,CMN3010F3,AR0521P0,AU0531D9,AU0504S6,AR0521P6,AU4581P1,CM65R2K6_D,AR2421D5,CMN4006F3,LC03-6,AU0502P1,AU0514PD,SMCJ5.0CA-550CA,CMN3004U,CM65R2K6_U,ASM36C,ASM24C,ASM12C,AU3401T1,ASM12H,CMN401R0F5,P4SMA6.8CA-600A,5KP5.0A-220A,P2SM6.8CA-250CA,AU3301P1,AU0721P1,CM60N10AGF5,AU0721P0,P4SMA6.8A-600A,CM2300,AR2502S8,ASM15C,AU1211P1,ASD33L,CM65R550_F,ASMF05C,CM2303,ASMF05L,AU1224S6,ASM15H,AU0521P1L,ASD33C,AR0544MP,CM65R550_P,AU0501P0,AU0501P1,SMDJ5.0A-220CA1.0,AR0534P9,CM2305,ASL05C,CM7319S8,AU0731P1,CM4953,AR3321P0,AR3321P1,AU0524P7,AU0541D5,AU0512P1,AR1255P4,P6KE6.8CA-600A,5.0SMC13A-250CA5.0,CM4407AF3,CMN6009F5,AR4501D9,CM65R190_P,ASM15,AR0551S2,ASM12,SLVU2.8-4,ASM33C,5.0SMC13A-250A,SLVU2.8-8,AU0506S8,ASM33H,AR3311P6,CMN4004F5,CM65R190_F,AU1201D5,CM65R190_K,ASM05,AR0507M8,AU0521D5,ASD40L,AU0521D9,SMBJ6.8A-530CA1.5,AR0508PB,ASD40C,SMCJ5.0A-550CA,ASL05-36,AU0521D3,CM3134E,AU2421P1,CMN3008F5,AU0505S2,SMBJ5.0A-550A,SMB15.J5.0A-180A,ASM33,SMB10J5.0CA-440A,ASM36,AR0552S2,SMA6J5.0CA-220CA,CM3134T,AU0505S6,SMC6.84-600CA,SMCJ5.0CA-550A,5.0SMC13CA-250A,CM70R400_P,CM3134K,CM1602S,AR0921P1,CMP3031F2,CM70R400_F,CMP3049S8,1.5KE6.8A-600A,AR8001S2,1.5SMC6.8C4-600A,P6SMB6.BCA-600CA,ASM24,SMAJ5.0CA-550A,SMA6J5.0CA-220A,CMN4008LU,CM1601S,AR0508MP,AU0504S2,CM10N65F,P2SM6.8A-250CA,AU0504S5,CM10N65P,ASR70,AU1521P1,CMN6075AS9,AU1521P0,SMB15.J5.0CA-180A,AUO701PIL,AU2411P1,CM60N10GF5,15KP5.0CA-220CA,AR3324P5,CM60R125_K,AU2521P0,AU2521P1,CMO5N50D,CMN3012S8,AR1511D3,P4KE6.8A-600CA,P6KE6.8A-600CA,3KP5.0CA-220A,SMB10J5.0CA-440CA,5KP5.0CA-220A,AR0524P5L,1.5SMB6.8A-250A,CM60R125_F,ASDO8CL,1.5KE6.8CA-600CA,CM60R090_K,AU0511D5,AR3304S2,AR0541P1,AU0511D9,P2SM6.8CA-250A,AR0554S8,AR1821P1,1.0SMBJ6.8A-530A,AU1221D3,CMN6086S8D,AU1221D5,P6SMA6.8A-440CA,AU0581P1,AR0821P1,ASD40CL,ASDOBL,SRV05-4E,AU2804S8,CM3139EW,CM4435,SMF5.0A-220A,ASRV05-4,CM07N80F,AU0701P1,CM07N80P,AU2401P1,CMN2006S8,AU3601D5,1.5SMB6.8CA-250CA,CMN6006S8,AR0504P3,AR0811D3,AR0504P4,5KP5.0CA-220CA,AU3601P1,AU0721D5,AR3321D5,S4MP5.0A-170CA,1.5KE6.8CA-600A,P6SMB6.BA-600A,AU0791P1,SMF5.0CA-220A,AU0561P0,AU0561P1,AR2421P1,SMA6J5.0A-220CA,AR0514MP,CMN4006S8,AR0521D5,ASMF05,AR0521D3,AR0504P9,AR0504PC,AR0521D9,CMN3004F5,P6SMB6.BCA-600A,AU0506M8,CM8205,5.0SMC13CA-250CA,P2SM6.8A-250A,LC03-3.3L,AR0504MP,AU3301D5,AU3301D3,SMB15.J5.0CA-180CA,AR0511D3,AU1821P1,ASD1524,CM12N65F,3.0SMC6.8CA-250A,CMBSS138,CM12N65P,SMF5.0CA-220CA,AU0501D5,P6KE6.8CA-600CA,AU1211P1L,AR3304P9,AR3304P8,SMDJ11A-220CA,AR3304P5,CM65R280_P,1.5SMC6.8C4-600CA,P4KE6.8CA-600CA,AR3304P3,AU0501D1,AU1521D5,CM65R280_F,AR3603P3,CMN3003F5,15KP5.0A-220A,P6SMA6.8CA-440A,AR1521P1,CMO4N80U,3KP5.0CA-220CA,ASD33,CM07N65F,CM07N65D,AR7004S2,SMAJ5.0A-550CA,ASD36,CMO4N80D,CM07N65P,SMB10J5.0A-440A,SMAJ5.0CA-550CA,CM07N65U,15KP5.0CA-220A,AU3351P1,AST24,AR3306PA,CM70R1K1_U,AU1261P1,SRV05-4,CMN2342,ASD24,CM70R1K1_D,AU0561M1,AR3311D3,AR0506PA,AU0551P1,AR1501P1,AU0561M0,CMN3006F3,AR121

2021 - 应能微 - 选型指南代理服务技术支持采购服务

具有7.3V OVP的ETA3409 3A、1 MHz同步降压转换器

描述- 该资料介绍了ETA3409是一款高效率的DC-DC降压转换器，可提供高达3A的输出电流。它适用于2.4V至7.3V的输入电压范围，并支持从0.6V到VIN的输出电压调节。这款器件运行在1MHz固定频率下，具有低噪声输出电压、内部补偿电路和短路保护等特点。

型号- ETA3409,ETA3409S2F

2021/11/29 - ETA SEMICONDUCTOR - 数据手册代理服务技术支持采购服务

TMI3410 5.5V，1MHz，2A同步降压变换器

描述- TMI3410是一款高效率的1MHz恒定频率同步降压转换器，适用于需要高达2A输出电流的便携式设备。它具有高达95%的效率，支持2.5V至5.5V的输入电压范围，并能够以低至0.6V的输出电压调节。该转换器具有低静态电流、短路保护和热关断功能，适用于多种应用场景。

型号- TMI3410

2022.11 - 拓尔微电子 - 数据手册 - V1.3 代理服务技术支持采购服务

微盟电子参展国产半导体应用技术大会，展示AC-DC、DC-DC和LDO三大产品线应用

MicrOne微盟电子参展国产半导体应用技术大会，展示AC-DC、DC-DC和LDO三大产品线，器件广泛用于充电器，适配器，PD快充，开放电源，反激式二次侧整流，反激电源，PD，机顶盒等领域。

2024-07-06 - 原厂动态代理服务技术支持采购服务

SC1101x高效1.5MHz 1A同步降压转换器规格书

描述- SC1101x是一款高效、高频同步降压转换器，适用于2.5V至5.5V输入电压范围，提供1A输出电流。该转换器具有低RDS(ON)、1.5MHz开关频率、内部软启动时间、内部补偿功能、100%占空比、输入过压保护、过流保护、短路保护、过温保护和RoHS合规性等特点。适用于机顶盒、液晶电视、AP路由器、WiFi、G-PON、E-PON和xDSL等领域。

型号- SC1101X,SC1101NSTR-I,SC1101SSTR-I

Aug.30, 2023 - 思泰微电子 - 数据手册 - Revision No.1.1 代理服务技术支持采购服务

家用电器电源整体解决方案

描述- 深圳市必易微电子股份有限公司，专注于高性能模拟及数模混合集成电路的研发和销售，拥有多项专利，产品涵盖AC-DC、DC-DC、驱动IC、线性稳压、保护芯片、电池管理等，为消费电子、工业、通讯、计算机等领域提供电源解决方案。公司拥有多个研发中心，并与多家知名客户建立合作关系，获得多项荣誉资质。

型号- KP3282,KP21825C,KP3281,KP52X218,KP311A,KP2264H,KP311B,KP522211,KP3116,KP525208,KP525201,KP86202,KP86201,KP36572,KP36374,KP82201,KP36373,KP521405,KP522218,KP521403,KP3114,KP3112,KP3311,KP3210B,KP521403A,KP522201,KP526208,KP523211,KP81103,KP81102,KP85302,KP81101,KP85301,KP3221,KP522208,KP522405,KP3224,KP523218,KP3222,KP85309,KP2161M,KP3211B,KP2262H,KP526201,KP2126,KP321AB,KP36675,KP36674,KP36673,KP85211,KP523201,KP52X201,KP523208,KP3212B,KP52X208,KP2161,KP521405A,KP3206,KP3205,KP524201,KP85321,KP52X211,KP3284,KP524208,KP21824M

2023/6/12 - 必易微 - 应用及方案 - REV1.0 代理服务技术支持采购服务