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LM1771

正在供貨

具有精密啟用和無需外部補償組件的低壓同步降壓控制器

可提供此產(chǎn)品的更新版本

功能與比較器件相似
TPS62827 正在供貨 采用 1.5mm x 1.5mm QFN 封裝、具有 1% 精度的 2.5V 至 5.5V 輸入、4A 降壓轉(zhuǎn)換器 Smaller solution size DC/DC converter family 1 A, 2 A, 3 A and 4 A

產(chǎn)品詳情

Rating Catalog Iout (max) (A) 6 Vin (max) (V) 5.5 Vin (min) (V) 2.8 Vout (max) (V) 4.5 Vout (min) (V) 0.8 Control mode Constant on-time (COT) Features Enable pin Operating temperature range (°C) -40 to 125 Iq (typ) (μA) 400 Duty cycle (max) (%) 98 Number of phases 1
Rating Catalog Iout (max) (A) 6 Vin (max) (V) 5.5 Vin (min) (V) 2.8 Vout (max) (V) 4.5 Vout (min) (V) 0.8 Control mode Constant on-time (COT) Features Enable pin Operating temperature range (°C) -40 to 125 Iq (typ) (μA) 400 Duty cycle (max) (%) 98 Number of phases 1
VSSOP (DGK) 8 14.7 mm2 3 x 4.9 WSON (NGG) 6 9 mm2 3 x 3
  • Input Voltage Range of 2.8 V to 5.5 V
  • 0.8-V Reference Voltage
  • Precision Enable
  • No Compensation Required
  • Constant Frequency Across Input Range
  • Low Quiescent Current of 400 μA
  • Internal Soft-Start
  • Short Circuit Protection
  • 6-Pin WSON Package and 8-Pin VSSOP Package
  • Input Voltage Range of 2.8 V to 5.5 V
  • 0.8-V Reference Voltage
  • Precision Enable
  • No Compensation Required
  • Constant Frequency Across Input Range
  • Low Quiescent Current of 400 μA
  • Internal Soft-Start
  • Short Circuit Protection
  • 6-Pin WSON Package and 8-Pin VSSOP Package

The LM1771 device is an efficient synchronous buck switching controller with a precision enable requiring no external compensation. The constant ON-time control scheme provides a simple design free of compensation components, allowing minimal component count and board space. The precision enable pin allows flexibility in sequencing multiple rails and setting UVLO. The LM1771 also incorporates a unique input feedforward to maintain a constant frequency independent of the input voltage. The LM1771 is optimized for a low-voltage input range of 2.8 V to 5.5 V and can provide an adjustable output as low as 0.8 V. Driving an external high-side PFET and low-side NFET, it can provide efficiencies as high as 95%.

Three versions of the LM1771 are available depending on the switching frequency desired for the application. Nominal switching frequencies are in the range of 100 kHz to 1000 kHz.

The LM1771 device is an efficient synchronous buck switching controller with a precision enable requiring no external compensation. The constant ON-time control scheme provides a simple design free of compensation components, allowing minimal component count and board space. The precision enable pin allows flexibility in sequencing multiple rails and setting UVLO. The LM1771 also incorporates a unique input feedforward to maintain a constant frequency independent of the input voltage. The LM1771 is optimized for a low-voltage input range of 2.8 V to 5.5 V and can provide an adjustable output as low as 0.8 V. Driving an external high-side PFET and low-side NFET, it can provide efficiencies as high as 95%.

Three versions of the LM1771 are available depending on the switching frequency desired for the application. Nominal switching frequencies are in the range of 100 kHz to 1000 kHz.
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技術文檔

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類型 標題 下載最新的英語版本 日期
* 數(shù)據(jù)表 LM1771 Low-Voltage Synchronous Buck Controller With Precision Enable and No External Compensation 數(shù)據(jù)表 (Rev. D) PDF | HTML 2016年 1月 8日
技術文章 How to implement voltage monitoring PDF | HTML 2015年 7月 22日
EVM 用戶指南 AN-1477 LM1771 Evaluation Board (Rev. B) 2013年 4月 23日
應用手冊 Controlling Output Ripple & Achiev ESR Indep Constant On-Time Reg Designs (Rev. A) 2013年 4月 23日
應用手冊 Controlling Output Ripple & Achiev ESR Indep Constant On-Time Reg Designs (cn) 最新英語版本 (Rev.A) 2006年 9月 27日
應用手冊 Application Note 1477 LM1771 Evaluation Board (cn) 2006年 7月 10日

設計和開發(fā)

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封裝 引腳 CAD 符號、封裝和 3D 模型
VSSOP (DGK) 8 Ultra Librarian
WSON (NGG) 6 Ultra Librarian

訂購和質(zhì)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(xù)可靠性監(jiān)測
包含信息：
  • 制造廠地點
  • 封裝廠地點

支持和培訓

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