LM3691

正在供貨

用于便攜式應用的高準確度、微型 1A、降壓直流/直流轉換器

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open-in-new 比較替代產品
功能與比較器件相同，但引腳排列有所不同
TPS62860 正在供貨 具有 I2C/VSEL 接口的 1.75V 至 5.5V 輸入、0.6A 超低 IQ 降壓轉換器 Smaller solution size and low quiescent current with I2C/VSEL interface

產品詳情

Rating Catalog Topology Buck Iout (max) (A) 1 Vin (max) (V) 5.5 Vin (min) (V) 2.3 Vout (max) (V) 3.3 Vout (min) (V) 0.75 Features Enable, Forced PWM, Light Load Efficiency, Light load efficiency, Synchronous Rectification Control mode Voltage mode Switching frequency (min) (kHz) 3600 Switching frequency (max) (kHz) 4400 Operating temperature range (°C) -30 to 85 Iq (typ) (μA) 64 Duty cycle (max) (%) 100 Type Converter
Rating Catalog Topology Buck Iout (max) (A) 1 Vin (max) (V) 5.5 Vin (min) (V) 2.3 Vout (max) (V) 3.3 Vout (min) (V) 0.75 Features Enable, Forced PWM, Light Load Efficiency, Light load efficiency, Synchronous Rectification Control mode Voltage mode Switching frequency (min) (kHz) 3600 Switching frequency (max) (kHz) 4400 Operating temperature range (°C) -30 to 85 Iq (typ) (μA) 64 Duty cycle (max) (%) 100 Type Converter
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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類型 標題 下載最新的英語版本 日期
* 數據表 LM3691 High-Accuracy, Miniature 1-A Step-Down DC-DC Converter for Portable Applications 數據表 (Rev. J) PDF | HTML 2015年 12月 17日
應用手冊 半導體和 IC 封裝熱指標 (Rev. D) PDF | HTML 英語版 (Rev.D) PDF | HTML 2024年 4月 24日
選擇指南 電源管理指南 2018 (Rev. K) 2018年 7月 31日
選擇指南 電源管理指南 2018 (Rev. R) 2018年 6月 25日
EVM 用戶指南 AN-1772 LM3691 Evaluation Board (Rev. B) 2013年 4月 30日
應用手冊 AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 2013年 4月 24日
應用手冊 AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 2013年 4月 23日
應用手冊 AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 2013年 4月 23日
應用手冊 AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 2013年 4月 23日
更多文獻資料 SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 2005年 7月 12日
應用手冊 AN-643 EMI/RFI Board Design (Rev. B) 2004年 5月 3日

設計和開發

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評估板

LM3691TL-1.8EV — LM3691TL-1.8 評估板

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 (...)

用戶指南: PDF
TI.com 上無現貨
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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封裝 引腳 CAD 符號、封裝和 3D 模型
DSBGA (YZR) 6 Ultra Librarian

訂購和質量

包含信息：
  • RoHS
  • REACH
  • 器件標識
  • 引腳鍍層/焊球材料
  • MSL 等級/回流焊峰值溫度
  • MTBF/時基故障估算
  • 材料成分
  • 鑒定摘要
  • 持續可靠性監測
包含信息：
  • 制造廠地點
  • 封裝廠地點

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