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AC/DC 和 DC/DC 控制器 (外部 FET)

LM5088-Q1

現行

汽車級 4.5-75V 大範圍 Vin 電流模式非同步降壓控制器

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產品規格表

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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.

LM5088-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 current mode Topology Buck Rating Automotive Vout (min) (V) 1.205 Vout (max) (V) 70 Features Adjustable current limit, Enable, Frequency synchronization Iq (typ) (µA) 3800 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 current mode Topology Buck Rating Automotive Vout (min) (V) 1.205 Vout (max) (V) 70 Features Adjustable current limit, Enable, Frequency synchronization Iq (typ) (µA) 3800 Duty cycle (max) (%) 100 Number of phases 1
HTSSOP (PWP) 16 32 mm² 5 x 6.4
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature range
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C5
  • Emulated current mode control
  • Drives external high-side N-channel MOSFET
  • Ultra-wide input voltage range from 4.5 V to 75 V
  • Low IQ shutdown and standby modes
  • High duty cycle ratio feature for reduced dropout voltage
  • Spread spectrum EMI reduction (LM5088-1)
  • Hiccup timer for overload protection (LM5088-2)
  • Adjustable output voltage from 1.205 V with 1.5% feedback reference accuracy
  • Wide bandwidth error amplifier
  • Single resistor oscillator frequency setting
  • Oscillator synchronization capability
  • Programmable soft start
  • High voltage, low dropout bias regulator
  • Thermal shutdown protection
  • 16-pin HTSSOP package
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature range
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C5
  • Emulated current mode control
  • Drives external high-side N-channel MOSFET
  • Ultra-wide input voltage range from 4.5 V to 75 V
  • Low IQ shutdown and standby modes
  • High duty cycle ratio feature for reduced dropout voltage
  • Spread spectrum EMI reduction (LM5088-1)
  • Hiccup timer for overload protection (LM5088-2)
  • Adjustable output voltage from 1.205 V with 1.5% feedback reference accuracy
  • Wide bandwidth error amplifier
  • Single resistor oscillator frequency setting
  • Oscillator synchronization capability
  • Programmable soft start
  • High voltage, low dropout bias regulator
  • Thermal shutdown protection
  • 16-pin HTSSOP package

The LM5088 high voltage non-synchronous buck controller features all the necessary functions to implement an efficient, high-voltage buck converter using a minimum number of external components. The LM5088 can be configured to operate over an ultra-wide input voltage range of 4.5 V to 75 V. This easy-to-use controller includes a level-shifted gate driver capable of controlling an external N-channel buck switch. The control method is based upon peak current mode control utilizing an emulated current ramp. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage and low output voltage applications. The LM5088 switching frequency is programmable from 50 kHz to 1 MHz.

The LM5088 is available in two versions: The LM5088-1 provides a ±5% frequency dithering function to reduce the conducted and radiated EMI, while the LM5088-2 provides a versatile restart timer for overload protection. Additional features include a low dropout bias regulator, tri-level enable input to control shutdown and standby modes, soft start, and oscillator synchronization capability. The device is available in a thermally enhanced 16-pin HTSSOP package.

The LM5088 high voltage non-synchronous buck controller features all the necessary functions to implement an efficient, high-voltage buck converter using a minimum number of external components. The LM5088 can be configured to operate over an ultra-wide input voltage range of 4.5 V to 75 V. This easy-to-use controller includes a level-shifted gate driver capable of controlling an external N-channel buck switch. The control method is based upon peak current mode control utilizing an emulated current ramp. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage and low output voltage applications. The LM5088 switching frequency is programmable from 50 kHz to 1 MHz.

The LM5088 is available in two versions: The LM5088-1 provides a ±5% frequency dithering function to reduce the conducted and radiated EMI, while the LM5088-2 provides a versatile restart timer for overload protection. Additional features include a low dropout bias regulator, tri-level enable input to control shutdown and standby modes, soft start, and oscillator synchronization capability. The device is available in a thermally enhanced 16-pin HTSSOP package.
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技術文件

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類型 標題 日期
* Data sheet LM5088, LM5088-Q1 Wide Input Range Non-Synchronous Buck Controller datasheet (Rev. J) PDF | HTML 2022年 6月 8日
White paper Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) 2019年 4月 10日
Application note Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B) 2019年 3月 12日
Analog Design Journal Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics 2016年 7月 21日
Application note Load Dump and Cranking Protection for Automotive Backlight LED Power Supply (Rev. A) 2015年 3月 16日
EVM User's guide AN-1913 LM5088 Evaluation Board (Rev. E) 2013年 4月 30日
Application note Create an Inverting Power Supply from a Step-Down Regulator (Rev. B) 2012年 10月 26日
Application note Level Shifting Control for an Inverting Buck-boost 2012年 10月 10日
Application note Improved Load Current Capability for Cap-Drop Off-Line Power Supply for E-Meter 2011年 10月 27日
Application note Improve Power Converter Reliability Using Hiccup-Mode Current Limiting 2009年 5月 11日
Analog Design Journal Using a buck converter in an inverting buck-boost topology 2007年 10月 12日

設計與開發

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開發板

LM5088MH-1EVAL — LM5088-1 - 具有抖動的寬輸入範圍非同步降壓控制器評估模組

The LM5088-1 evaluation board is designed to provide the design engineer with a fully functional power converter based on Emulated Current Mode Control to evaluate the LM5088 controller IC. The LM5088 evaluation board is available in two versions (like the LM5088 controller): the LM5088-1 (...)

使用指南: PDF
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開發板

LM5088MH-2EVAL — LM5088-2 - 具有打嗝模式重新啟動的寬輸入範圍非同步降壓控制器

The LM5088-2 evaluation board is designed to provide the design engineer with a fully functional power converter based on Emulated Current Mode Control to evaluate the LM5088 controller IC. The LM5088 evaluation board is available in two versions (like the LM5088 controller): the LM5088-1 (...)

使用指南: PDF
TI.com 無法提供
模擬型號

LM5088 TINA-TI Transient Reference Design

SNVM022.TSC (136 KB) - TINA-TI Reference Design
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模擬型號

LM5088 TINA-TI Transient Spice Model

SNVM021.ZIP (16 KB) - TINA-TI Spice Model
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計算工具

LM25088-5088QUICK-CALC — LM(2)5088 快速入門計算機

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HTSSOP (PWP) 16 Ultra Librarian
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