主页 电源管理 AC/DC & DC/DC converters (integrated FET)
主页
电源管理
AC/DC & DC/DC converters (integrated FET)

LM3679

正在供货

用于超低截面应用的 3MHz、350mA 微型降压 DC-DC 转换器

立即订购
数据表

可提供此产品的更新版本

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
全新 TPS62843 正在供货 1.8V 至 5.5V 输入电压、600mA 超低 IQ 降压转换器 Smaller solution size with 275-nA IQ and 0.4-V to 3.6-V VOUT

LM3679

正在供货
数据表 立即订购

产品详情

Iout (max) (A) 0.35 Vin (min) (V) 2.5 Vin (max) (V) 5.5 Topology Buck Type Converter Switching frequency (min) (kHz) 2500 Switching frequency (max) (kHz) 3500 Features Enable, Light Load Efficiency, Light load efficiency, Synchronous Rectification Control mode Voltage mode Vout (min) (V) 1.8 Vout (max) (V) 1.8 Rating Catalog Operating temperature range (°C) -30 to 85 Iq (typ) (A) 0.000016
Iout (max) (A) 0.35 Vin (min) (V) 2.5 Vin (max) (V) 5.5 Topology Buck Type Converter Switching frequency (min) (kHz) 2500 Switching frequency (max) (kHz) 3500 Features Enable, Light Load Efficiency, Light load efficiency, Synchronous Rectification Control mode Voltage mode Vout (min) (V) 1.8 Vout (max) (V) 1.8 Rating Catalog Operating temperature range (°C) -30 to 85 Iq (typ) (A) 0.000016
DSBGA (YPD) 5 2.02 mm² 1.616 x 1.25

  • 16 µA typical quiescent current
  • 350 mA maximum load capability
  • 3 MHz PWM fixed switching frequency (typ)
  • Automatic PFM/PWM mode switching
  • Available in 5-bump micro SMD package and UR package
  • Internal synchronous rectification for high efficiency
  • Internal soft start
  • 0.01 µA typical shutdown current
  • Operates from a single Li-Ion cell battery
  • Current overload and Thermal shutdown protection
  • Three external components required for typical applications
  • Low profile solution (0.55mm max height, includes four external components)
    •

  • 16 µA typical quiescent current
  • 350 mA maximum load capability
  • 3 MHz PWM fixed switching frequency (typ)
  • Automatic PFM/PWM mode switching
  • Available in 5-bump micro SMD package and UR package
  • Internal synchronous rectification for high efficiency
  • Internal soft start
  • 0.01 µA typical shutdown current
  • Operates from a single Li-Ion cell battery
  • Current overload and Thermal shutdown protection
  • Three external components required for typical applications
  • Low profile solution (0.55mm max height, includes four external components)
    •

    The LM3679 step-down DC-DC converter is optimized for powering ultra-low voltage circuits from a single Li-Ion cell battery and input voltage rails from 2.5V to 5.5V. It provides up to 350mA load current, over the entire input voltage range. The LM3679 output voltage can be configured to 1.2V, 1.5V, or 1.8V.

    The device offers superior features and performance for mobile phones and similar portable applications with complex power management systems. Automatic intelligent switching between PWM low-noise and PFM low-current mode offers improved system control. During PWM mode operation, the device operates at a fixed-frequency of 3 MHz (typ). PWM mode drives loads from ~ 80mA to 350mA max. Hysteretic PFM mode extends the battery life by reducing the quiescent current to 16 µA (typ) during light load and standby operation. Internal synchronous rectification provides high efficiency. In shutdown mode (Enable pin pulled low), the device turns off and reduces battery consumption to 0.01 µA (typ).

    The LM3679 is available in a lead-free (No PB) 5-bump micro SMD package, 0.6mm height, and in an ultra thin 0.3mm height UR package. Using the UR package along with specific external components, allows for a low profile solution size with a max height of 0.55mm. A switching frequency of 3 MHz (typ) allows use of tiny surface-mount components. Only three external surface-mount components, an inductor and two ceramic capacitors, are required. .

    The LM3679 step-down DC-DC converter is optimized for powering ultra-low voltage circuits from a single Li-Ion cell battery and input voltage rails from 2.5V to 5.5V. It provides up to 350mA load current, over the entire input voltage range. The LM3679 output voltage can be configured to 1.2V, 1.5V, or 1.8V.

    The device offers superior features and performance for mobile phones and similar portable applications with complex power management systems. Automatic intelligent switching between PWM low-noise and PFM low-current mode offers improved system control. During PWM mode operation, the device operates at a fixed-frequency of 3 MHz (typ). PWM mode drives loads from ~ 80mA to 350mA max. Hysteretic PFM mode extends the battery life by reducing the quiescent current to 16 µA (typ) during light load and standby operation. Internal synchronous rectification provides high efficiency. In shutdown mode (Enable pin pulled low), the device turns off and reduces battery consumption to 0.01 µA (typ).

    The LM3679 is available in a lead-free (No PB) 5-bump micro SMD package, 0.6mm height, and in an ultra thin 0.3mm height UR package. Using the UR package along with specific external components, allows for a low profile solution size with a max height of 0.55mm. A switching frequency of 3 MHz (typ) allows use of tiny surface-mount components. Only three external surface-mount components, an inductor and two ceramic capacitors, are required. .

    open-in-new 查找其他 AC/DC & DC/DC converters (integrated FET)
    下载 观看带字幕的视频 视频

    技术文档

    star =有关此产品的 TI 精选热门文档
    未找到结果。请清除搜索并重试。
    查看全部 2
    类型 标题 下载最新的英语版本 日期
    * 数据表 3MHz, 350mA Mini Step-Down DC-DC Conv for Ultra Low Profile Apps (ht < 0.55mm) 数据表 (Rev. A) 2008年 2月 5日
    EVM 用户指南 AN-1682 LM3679TL Evaluation Board (Rev. C) 2013年 4月 30日

    设计和开发

    如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。

    封装 引脚 下载
    DSBGA (YPD) 5 查看选项
    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

    视频