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

LM3678

現行

適用手持應用的高性能、微型 1.5A 降壓 DC-DC 轉換器

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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產品不同
TPS62825 現行 採用 1.5-mm x 1.5-mm QFN 封裝，具有 1% 準確度的 2.4-V 至 5.5-V 輸入、2-A 降壓轉換器 Smaller solution size with higher output voltage range 0.6 V to 4 V

LM3678

現行
產品規格表 立即訂購

產品詳細資料

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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類型 標題 日期
* Data sheet H-Perform, Mini 1.5-A Step-Dwn DC-DC Cnvrtr for Handheld Apps datasheet (Rev. C) 2013年 5月 2日
Selection guide Power Management Guide 2018 (Rev. R) 2018年 6月 25日
EVM User's guide AN-1722 LM3678 Evaluation Board (Rev. B) 2013年 4月 30日

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