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AC/DC 和 DC/DC 轉換器 (整合式 FET)

LM3679

現行

適用超小巧應用的 3MHz、350mA 微型降壓 DC-DC 轉換器

立即訂購
產品規格表

現在提供此產品的更新版本

open-in-new 比較替代產品
功能相同，但引腳輸出與所比較的裝置不同
TPS62843 現行 1.8V 至 5.5V 輸入，600mA 超低 IQ 降壓轉換器 Smaller solution size with 275-nA IQ and 0.4-V to 3.6-V VOUT

LM3679

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Operating temperature range (°C) -30 to 85 Topology Buck Type Converter Iout (max) (A) 0.35 Vin (min) (V) 2.5 Vin (max) (V) 5.5 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 Iq (typ) (µA) 16 Duty cycle (max) (%) 100
Rating Catalog Operating temperature range (°C) -30 to 85 Topology Buck Type Converter Iout (max) (A) 0.35 Vin (min) (V) 2.5 Vin (max) (V) 5.5 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 Iq (typ) (µA) 16 Duty cycle (max) (%) 100
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. .

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    技術文件

    star =TI 所選的此產品重要文件
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    類型 標題 日期
    * Data sheet 3MHz, 350mA Mini Step-Down DC-DC Conv for Ultra Low Profile Apps (ht < 0.55mm) datasheet (Rev. A) 2008年 2月 5日
    EVM User's guide AN-1682 LM3679TL Evaluation Board (Rev. C) 2013年 4月 30日

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    訂購與品質

    內含資訊：
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    • 產品標記
    • 鉛塗層/球物料
    • MSL 等級/回焊峰值
    • MTBF/FIT 估算值
    • 材料內容
    • 認證摘要
    • 進行中持續性的可靠性監測
    內含資訊：
    • 晶圓廠位置
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