LM5085

正在供貨

4.5V 至 75V 寬輸入電壓、恒定導通時間非同步 PFET 降壓控制器

可提供此產品的更新版本

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
LM5141 正在供貨 低 Iq、寬輸入范圍同步降壓控制器 Optional spread spectrum for improved EMI.

產品詳情

Rating Catalog Topology Buck Iout (max) (A) 10 Vin (max) (V) 75 Vin (min) (V) 4.5 Vout (max) (V) 75 Vout (min) (V) 1.25 Control mode Constant on-time (COT) Features Adjustable current limit, Enable, Frequency synchronization Operating temperature range (°C) -40 to 125 Iq (typ) (μA) 1300 Duty cycle (max) (%) 100 Number of phases 1
Rating Catalog Topology Buck Iout (max) (A) 10 Vin (max) (V) 75 Vin (min) (V) 4.5 Vout (max) (V) 75 Vout (min) (V) 1.25 Control mode Constant on-time (COT) Features Adjustable current limit, Enable, Frequency synchronization Operating temperature range (°C) -40 to 125 Iq (typ) (μA) 1300 Duty cycle (max) (%) 100 Number of phases 1
HVSSOP (DGN) 8 14.7 mm2 3 x 4.9 VSSOP (DGK) 8 14.7 mm2 3 x 4.9 WSON (NGQ) 8 9 mm2 3 x 3
  • LM5085-Q1 is an Automotive Grade Product that
    is AEC-Q100 Grade 1 Qualified (–40°C to 125°C
    Operating Junction Temperature)
  • Wide 4.5-V to 75-V Input Voltage Range
  • Adjustable Current Limit Using RDS(ON) or a
    Current Sense Resistor
  • Programmable Switching Frequency to 1MHz
  • No Loop Compensation Required
  • Ultra-Fast Transient Response
  • Nearly Constant Operating Frequency with Line
    and Load Variations
  • Adjustable Output Voltage from 1.25 V
  • Precision ±2% Feedback Reference
  • Capable of 100% Duty Cycle Operation
  • Internal Soft-start Timer
  • Integrated High Voltage Bias Regulator
  • Thermal Shutdown
  • Package:
    • HVSSOP-8
    • VSSOP-8
    • WSON-8
  • LM5085-Q1 is an Automotive Grade Product that
    is AEC-Q100 Grade 1 Qualified (–40°C to 125°C
    Operating Junction Temperature)
  • Wide 4.5-V to 75-V Input Voltage Range
  • Adjustable Current Limit Using RDS(ON) or a
    Current Sense Resistor
  • Programmable Switching Frequency to 1MHz
  • No Loop Compensation Required
  • Ultra-Fast Transient Response
  • Nearly Constant Operating Frequency with Line
    and Load Variations
  • Adjustable Output Voltage from 1.25 V
  • Precision ±2% Feedback Reference
  • Capable of 100% Duty Cycle Operation
  • Internal Soft-start Timer
  • Integrated High Voltage Bias Regulator
  • Thermal Shutdown
  • Package:
    • HVSSOP-8
    • VSSOP-8
    • WSON-8

The LM5085 is a high efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, efficient buck regulator for a wide range of applications. This high voltage controller contains a PFET gate driver and a high voltage bias regulator which operates over a wide 4.5-V to 75-V input range. The constant on-time regulation principle requires no loop compensation, simplifies circuit implementation, and results in ultrafast load transient response. The operating frequency remains nearly constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The PFET architecture allows 100% duty cycle operation for a low dropout voltage. Either the RDS(ON) of the PFET or an external sense resistor can be used to sense current for over-current detection.

The LM5085 is a high efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, efficient buck regulator for a wide range of applications. This high voltage controller contains a PFET gate driver and a high voltage bias regulator which operates over a wide 4.5-V to 75-V input range. The constant on-time regulation principle requires no loop compensation, simplifies circuit implementation, and results in ultrafast load transient response. The operating frequency remains nearly constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The PFET architecture allows 100% duty cycle operation for a low dropout voltage. Either the RDS(ON) of the PFET or an external sense resistor can be used to sense current for over-current detection.
下載 觀看帶字幕的視頻 視頻

技術文檔

star =有關此產品的 TI 精選熱門文檔
未找到結果。請清除搜索并重試。
查看全部 9
類型 標題 下載最新的英語版本 日期
* 數據表 LM5085/-Q1 75-V Constant On-Time PFET Buck Switching Controller 數據表 (Rev. I) PDF | HTML 2015年 8月 12日
技術文章 Crafty idea: Create a 150V non synchronous buck solution with a lower Vin rated co PDF | HTML 2017年 8月 25日
模擬設計期刊 Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics 2016年 7月 21日
技術文章 How to design for EMC and isolation with Fly-Buck? converters PDF | HTML 2015年 7月 28日
應用手冊 Transient Response versus Ripple – An Analysis of Ripple Injection Techniques 2014年 4月 28日
白皮書 Wide VIN power management ICs simplify white paper (Rev. A) 2013年 9月 19日
EVM 用戶指南 AN-1878 LM5085 Evaluation Board (Rev. B) 2013年 4月 30日
應用手冊 Constant Current Constant Voltage Buck Converter w/LM25085 (Rev. A) 2013年 4月 23日
應用手冊 利用降壓P-FET控制器設計非反向降壓/升壓 (Zeta) 轉換器 英語版 2011年 4月 22日

設計和開發

如需其他信息或資源，請點擊以下任一標題進入詳情頁面查看（如有）。

評估板

LM5085EVAL — LM5085 - 75V 恒準時 PFET 降壓開關控制器評估模塊

The LM5085 evaluation board provides the design engineer with a fully functional buck regulator, employing the LM5085 PFET switching controller which uses the constant on-time (COT) operating principle. The evaluation board provides a 5V output over an input range of 5.5V to 55V. The circuit (...)

用戶指南: PDF
TI.com 上無現貨
仿真模型

LM5085 PSpice Transient Model (Rev. A)

SNVM213A.ZIP (135 KB) - PSpice Model
下載
仿真模型

LM5085 PSpice Unencrypted Transient Model (Rev. B)

SNVM213B.ZIP (147 KB) - PSpice Model
下載
仿真模型

LM5085 TINA-TI Load Transient Reference Design (Rev. A)

SNVM496A.TSC (135 KB) - TINA-TI Reference Design
下載
仿真模型

LM5085 TINA-TI Startup Reference Design (Rev. A)

SNVM497A.TSC (136 KB) - TINA-TI Reference Design
下載
仿真模型

LM5085 TINA-TI Transient Spice Model (Rev. A)

SNVM498A.ZIP (20 KB) - TINA-TI Spice Model
下載
仿真模型

LM5085 Unencrypted PSpice Transient Model

SNVM955.ZIP (3 KB) - PSpice Model
下載
計算工具

LM25085-5085QUICK-CALC — LM(2)5085 快速入門計算器

下載
封裝 引腳 CAD 符號、封裝和 3D 模型
HVSSOP (DGN) 8 Ultra Librarian
VSSOP (DGK) 8 Ultra Librarian
WSON (NGQ) 8 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

推薦產品可能包含與 TI 此產品相關的參數、評估模塊或參考設計。

支持和培訓

視頻