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AC/DC & DC/DC converters (integrated FET)

LM3678

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用于便携式应用的高性能、微型 1.5A 降压 DC-DC 转换器

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open-in-new 比较替代产品
功能与比较器件相同但引脚有所不同
TPS62825 正在供货 采用 1.5mm x 1.5mm QFN 封装、具有 1% 精度的 2.4V 至 5.5V 输入、2A 降压转换器 Smaller solution size with higher output voltage range 0.6 V to 4 V

LM3678

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产品详情

Iout (max) (A) 1.5 Vin (min) (V) 2.5 Vin (max) (V) 5.5 Topology Buck Type Converter Switching frequency (min) (kHz) 2700 Switching frequency (max) (kHz) 3600 Features Adaptive/Dynamic Voltage Scaling, Enable, Power good, Synchronous Rectification Control mode Voltage mode Vout (min) (V) 0.8 Vout (max) (V) 1.2 Rating Catalog Operating temperature range (°C) -30 to 85 Iq (typ) (A) 0.0004
Iout (max) (A) 1.5 Vin (min) (V) 2.5 Vin (max) (V) 5.5 Topology Buck Type Converter Switching frequency (min) (kHz) 2700 Switching frequency (max) (kHz) 3600 Features Adaptive/Dynamic Voltage Scaling, Enable, Power good, Synchronous Rectification Control mode Voltage mode Vout (min) (V) 0.8 Vout (max) (V) 1.2 Rating Catalog Operating temperature range (°C) -30 to 85 Iq (typ) (A) 0.0004
WSON (DSC) 10 9 mm² 3 x 3
  • VOUT = 0.8 V or 1.2 V
  • VIN = 2.5 V to 5.5 V
  • 1.5-A Maximum Load Capability
  • 3.3-MHz (Typical) PWM Fixed Switching Frequency Allows Use of 1-µH Inductor
  • ±3% DC Output Voltage Precision
  • 0.01-µA (Typical) Shutdown Current
  • Internal Synchronous Rectification for High Efficiency
  • Internal Soft Start
  • Current Overload and Thermal Shutdown Protection

All trademarks are the property of their respective owners.

  • VOUT = 0.8 V or 1.2 V
  • VIN = 2.5 V to 5.5 V
  • 1.5-A Maximum Load Capability
  • 3.3-MHz (Typical) PWM Fixed Switching Frequency Allows Use of 1-µH Inductor
  • ±3% DC Output Voltage Precision
  • 0.01-µA (Typical) Shutdown Current
  • Internal Synchronous Rectification for High Efficiency
  • Internal Soft Start
  • Current Overload and Thermal Shutdown Protection

All trademarks are the property of their respective owners.

The LM3678 step-down DC-DC converter is optimized for powering low-voltage circuits from a single Li-Ion cell battery and input voltage rails from 2.5 V to 5.5 V. It provides up to 1.5-A load current, over the entire input voltage range. LM3678 offers a 0.8V or 1.2V option. One of the pair of voltages is set through the VSELECT pin.

LM3678 operates in PWM mode with a fixed frequency of 3.3 MHz. Internal synchronous rectification provides high efficiency during PWM mode operation. In shutdown mode, the device turns off and reduces battery consumption to 0.01 µA (typical).

The LM3678 is available in a 3mm x 3mm DSC-10 package. A high switching frequency of 3.3 MHz (typical) allows use of tiny surface-mount components. Only three external surface-mount components, an inductor and two ceramic capacitors, are required (solution size less than 33 mm2). For voltages other than the voltage shown, contact TI or your distributor.

The LM3678 step-down DC-DC converter is optimized for powering low-voltage circuits from a single Li-Ion cell battery and input voltage rails from 2.5 V to 5.5 V. It provides up to 1.5-A load current, over the entire input voltage range. LM3678 offers a 0.8V or 1.2V option. One of the pair of voltages is set through the VSELECT pin.

LM3678 operates in PWM mode with a fixed frequency of 3.3 MHz. Internal synchronous rectification provides high efficiency during PWM mode operation. In shutdown mode, the device turns off and reduces battery consumption to 0.01 µA (typical).

The LM3678 is available in a 3mm x 3mm DSC-10 package. A high switching frequency of 3.3 MHz (typical) allows use of tiny surface-mount components. Only three external surface-mount components, an inductor and two ceramic capacitors, are required (solution size less than 33 mm2). For voltages other than the voltage shown, contact TI or your distributor.
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类型 标题 下载最新的英语版本 日期
* 数据表 H-Perform, Mini 1.5-A Step-Dwn DC-DC Cnvrtr for Handheld Apps 数据表 (Rev. C) 2013年 5月 2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-1722 LM3678 Evaluation Board (Rev. B) 2013年 4月 30日

设计和开发

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封装 引脚 下载
WSON (DSC) 10 查看选项
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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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