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LM5085

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4.5V 至 75V 宽输入电压、恒准时非同步 PFET 降压控制器

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open-in-new 比较替代产品
功能与比较器件相同，但引脚排列有所不同
LM5141 正在供货 低 Iq、宽输入范围同步降压控制器 Optional spread spectrum for improved EMI.

LM5085

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产品详情

Vin (min) (V) 4.5 Vin (max) (V) 75 Iout (max) (A) 10 Operating temperature range (°C) -40 to 125 Control mode Constant on-time (COT) Topology Buck Rating Catalog Vout (min) (V) 1.25 Vout (max) (V) 75 Features Adjustable current limit, Enable, Frequency synchronization Iq (typ) (µA) 1300 Duty cycle (max) (%) 100 Number of phases 1
Vin (min) (V) 4.5 Vin (max) (V) 75 Iout (max) (A) 10 Operating temperature range (°C) -40 to 125 Control mode Constant on-time (COT) Topology Buck Rating Catalog Vout (min) (V) 1.25 Vout (max) (V) 75 Features Adjustable current limit, Enable, Frequency synchronization 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.
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技术文档

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类型 标题 下载最新的英语版本 日期
* 数据表 LM5085/-Q1 75-V Constant On-Time PFET Buck Switching Controller 数据表 (Rev. I) PDF | HTML 2015年 8月 12日
技术文章 Crafty idea: Create a 150V non synchronous buck solution with a lower Vin rated co PDF | HTML 2017年 8月 25日
模拟设计期刊 Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics 2016年 7月 21日
技术文章 How to design for EMC and isolation with Fly-Buck™ converters PDF | HTML 2015年 7月 28日
应用手册 Transient Response versus Ripple – An Analysis of Ripple Injection Techniques 2014年 4月 28日
白皮书 Wide VIN power management ICs simplify white paper (Rev. A) 2013年 9月 19日
EVM 用户指南 AN-1878 LM5085 Evaluation Board (Rev. B) 2013年 4月 30日
应用手册 Constant Current Constant Voltage Buck Converter w/LM25085 (Rev. A) 2013年 4月 23日
应用手册 利用降压P-FET控制器设计非反向降压/升压 (Zeta) 转换器 英语版 2011年 4月 22日

设计和开发

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评估板

LM5085EVAL — LM5085 - 75V 恒准时 PFET 降压开关控制器评估模块

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 (...)

用户指南: PDF
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仿真模型

LM5085 PSpice Transient Model (Rev. A)

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

LM5085 PSpice Unencrypted Transient Model (Rev. B)

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

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

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

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

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

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

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

LM5085 Unencrypted PSpice Transient Model

SNVM955.ZIP (3 KB) - PSpice Model
下载
计算工具

LM25085-5085QUICK-CALC — LM(2)5085 快速入门计算器

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封装 引脚 CAD 符号、封装和 3D 模型
HVSSOP (DGN) 8 Ultra Librarian
VSSOP (DGK) 8 Ultra Librarian
WSON (NGQ) 8 Ultra Librarian
应遵守 TI 评估类商品的标准条款与条件。

订购和质量

包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

支持和培训

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