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AC/DC & DC/DC controllers (external FET)

LM5085-Q1

現行

汽車級 4.5-75V 大範圍 Vin、恒定導通時間非同步 PFET 降壓控制器

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LM5141-Q1 現行 車用寬輸入 2.2-MHz 低 IQ 同步降壓控制器 Optional spread spectrum for improved EMI.

LM5085-Q1

現行
產品規格表 立即訂購

產品詳細資料

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) Rating Automotive Vout (min) (V) 1.25 Vout (max) (V) 75 Iq (typ) (A) 0.0013 Duty cycle (max) (%) 100
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) Rating Automotive Vout (min) (V) 1.25 Vout (max) (V) 75 Iq (typ) (A) 0.0013 Duty cycle (max) (%) 100
HVSSOP (DGN) 8 14.7 mm² 3 x 4.9
  • 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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類型 標題 日期
* Data sheet LM5085/-Q1 75-V Constant On-Time PFET Buck Switching Controller datasheet (Rev. I) PDF | HTML 2015年 8月 12日
EVM User's guide AN-1878 LM5085 Evaluation Board (Rev. B) 2013年 4月 30日
Application note Constant Current Constant Voltage Buck Converter w/LM25085 (Rev. A) 2013年 4月 23日
Application note Designing Non-Invert Buck-Boost (Zeta) Cnvrts w/a Buck P-FET Cntrl 2011年 4月 22日

設計與開發

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開發板

LM5085EVAL — LM5085 - 75V 廣泛 Vin 固定導通時間 PFET 降壓式切換控制器評估模組

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 (...)

使用指南: PDF
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模擬型號

LM5085 PSpice Transient Model (Rev. A)

SNVM213A.ZIP (135 KB) - PSpice Model
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模擬型號

LM5085 PSpice Unencrypted Transient Model (Rev. B)

SNVM213B.ZIP (147 KB) - PSpice Model
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模擬型號

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

SNVM496A.TSC (135 KB) - TINA-TI Reference Design
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模擬型號

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

SNVM497A.TSC (136 KB) - TINA-TI Reference Design
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模擬型號

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

SNVM498A.ZIP (20 KB) - TINA-TI Spice Model
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模擬型號

LM5085 Unencrypted PSpice Transient Model

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

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

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