主页 电源管理 AC/DC 和 DC/DC 转换器（集成 FET）
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电源管理
AC/DC 和 DC/DC 转换器（集成 FET）

LM3691

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用于便携式应用的高准确度、微型 1A、降压 DC-DC 转换器

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数据表

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功能与比较器件相同，但引脚排列有所不同
TPS62860 正在供货 具有 I2C/VSEL 接口的1.75V 至5.5V、0.6A 超低 IQ 降压转换器 Smaller solution size and low quiescent current with I2C/VSEL interface

LM3691

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米6体育平台手机版_好二三四详情

Rating Catalog Operating temperature range (°C) -30 to 85 Topology Buck Type Converter Iout (max) (A) 1 Vin (min) (V) 2.3 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 3600 Switching frequency (max) (kHz) 4400 Features Enable, Forced PWM, Light Load Efficiency, Light load efficiency, Synchronous Rectification Control mode Voltage mode Vout (min) (V) 0.75 Vout (max) (V) 3.3 Iq (typ) (µA) 64 Duty cycle (max) (%) 100
Rating Catalog Operating temperature range (°C) -30 to 85 Topology Buck Type Converter Iout (max) (A) 1 Vin (min) (V) 2.3 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 3600 Switching frequency (max) (kHz) 4400 Features Enable, Forced PWM, Light Load Efficiency, Light load efficiency, Synchronous Rectification Control mode Voltage mode Vout (min) (V) 0.75 Vout (max) (V) 3.3 Iq (typ) (µA) 64 Duty cycle (max) (%) 100
DSBGA (YZR) 6 2.1875 mm² 1.75 x 1.25
  • Input Voltage: 2.3 V to 5.5 V
  • Output Voltage: 0.75 V to 3.3 V
  • ±1% DC Output Voltage Precision
  • 4-MHz Switching Frequency
  • 64-μA (typical) Quiescent Current in ECO Mode
  • 1-A Maximum Load Capability
  • Automatic ECO/PWM Mode Switching
  • MODE Pin to Select ECO/Forced PWM Mode
  • Current Overload and Thermal Shutdown Protections
  • Only Three Tiny Surface-Mount External Components Required (Solution Size Less Than 15 mm2)
  • Input Voltage: 2.3 V to 5.5 V
  • Output Voltage: 0.75 V to 3.3 V
  • ±1% DC Output Voltage Precision
  • 4-MHz Switching Frequency
  • 64-μA (typical) Quiescent Current in ECO Mode
  • 1-A Maximum Load Capability
  • Automatic ECO/PWM Mode Switching
  • MODE Pin to Select ECO/Forced PWM Mode
  • Current Overload and Thermal Shutdown Protections
  • Only Three Tiny Surface-Mount External Components Required (Solution Size Less Than 15 mm2)

The LM3691 step-down DC-DC converter is optimized for powering ultra-low-voltage circuits from a single Li-Ion cell or 3 cell NiMH/NiCd batteries. It provides up to 1-A load current over an input voltage range from 2.3 V to 5.5 V. There are several different fixed voltage output options available.

The LM3691 has a mode-control pin that allows the user to select Forced PWM mode or ECO mode that changes modes between gated PWM mode and PWM automatically, depending on the load. In ECO mode, the device offers superior efficiency and very low IQ under light load conditions. ECO mode extends the battery life through reduction of the quiescent current during light load conditions and system standby.

The LM3691 is available in a 6-pin DSBGA package. Only three external surface-mount components, a
1-μH inductor, a 4.7-μF input capacitor, and a 4.7-μF output capacitor, are required.

For all available packages, see the orderable addendum at the end of the data sheet.

The LM3691 step-down DC-DC converter is optimized for powering ultra-low-voltage circuits from a single Li-Ion cell or 3 cell NiMH/NiCd batteries. It provides up to 1-A load current over an input voltage range from 2.3 V to 5.5 V. There are several different fixed voltage output options available.

The LM3691 has a mode-control pin that allows the user to select Forced PWM mode or ECO mode that changes modes between gated PWM mode and PWM automatically, depending on the load. In ECO mode, the device offers superior efficiency and very low IQ under light load conditions. ECO mode extends the battery life through reduction of the quiescent current during light load conditions and system standby.

The LM3691 is available in a 6-pin DSBGA package. Only three external surface-mount components, a
1-μH inductor, a 4.7-μF input capacitor, and a 4.7-μF output capacitor, are required.

For all available packages, see the orderable addendum at the end of the data sheet.
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技术文档

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类型 标题 下载最新的英语版本 日期
* 数据表 LM3691 High-Accuracy, Miniature 1-A Step-Down DC-DC Converter for Portable Applications 数据表 (Rev. J) PDF | HTML 2015年 12月 17日
应用手册 半导体和 IC 封装热指标 (Rev. D) PDF | HTML 英语版 (Rev.D) PDF | HTML 2024年 4月 24日
选择指南 电源管理指南 2018 (Rev. K) 2018年 7月 31日
选择指南 电源管理指南 2018 (Rev. R) 2018年 6月 25日
EVM 用户指南 AN-1772 LM3691 Evaluation Board (Rev. B) 2013年 4月 30日
应用手册 AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 2013年 4月 24日
应用手册 AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 2013年 4月 23日
应用手册 AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 2013年 4月 23日
应用手册 AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 2013年 4月 23日
更多文献资料 SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 2005年 7月 12日
应用手册 AN-643 EMI/RFI Board Design (Rev. B) 2004年 5月 3日

设计和开发

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评估板

LM3691TL-1.8EV — LM3691TL-1.8 评估板

The LM3691 step-down DC-DC converter is optimized for powering ultra-low voltage circuits from a single Li-Ion cell or 3 cell NiMH/NiCd batteries. It provides up to 1A load current, over an input voltage range from 2.3V to 5.5V. There are several different fixed voltage output options available.

The (...)

用户指南: PDF
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仿真模型

LM3691 Unencrypted PSpice Average Model Package (Rev. A)

SNVMAM5A.ZIP (22 KB) - PSpice Model
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仿真模型

LM3691 Unencrypted PSpice Transient Model Package (Rev. C)

SNVMAL9C.ZIP (118 KB) - PSpice Model
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封装 引脚 CAD 符号、封装和 3D 模型
DSBGA (YZR) 6 Ultra Librarian
应遵守 TI 评估类商品的标准条款与条件。

订购和质量

包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

支持和培训

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