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AC/DC 和 DC/DC 控制器 (外部 FET)

LM5141

現行

低 Iq、寬輸入範圍雙同步降壓控制器

立即訂購
產品規格表

LM5141

現行
產品規格表 立即訂購

產品詳細資料

Vin (min) (V) 3.8 Vin (max) (V) 65 Iout (max) (A) 30 Operating temperature range (°C) -40 to 125 Control mode current mode Topology Buck Rating Catalog Vout (min) (V) 1.5 Vout (max) (V) 15 Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Power good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification, UVLO Fixed Iq (typ) (µA) 35 Duty cycle (max) (%) 96 Number of phases 1
Vin (min) (V) 3.8 Vin (max) (V) 65 Iout (max) (A) 30 Operating temperature range (°C) -40 to 125 Control mode current mode Topology Buck Rating Catalog Vout (min) (V) 1.5 Vout (max) (V) 15 Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Power good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification, UVLO Fixed Iq (typ) (µA) 35 Duty cycle (max) (%) 96 Number of phases 1
VQFN (RGE) 24 16 mm² 4 x 4
  • –40ºC to +125ºC Ambient Operating Temperature Range
  • An AEC-Q100 Qualified Device is Available
  • VIN 3.8 V to 65 V (70 V Absolute Maximum)
  • Output: Fixed 3.3 V, 5 V, or Adjustable From
    1.5 V - 15 V with ±0.8% Accuracy
  • Fixed 2.2 MHz or 440 kHz Switching Frequency with ±5% Accuracy
  • High-Side and Low-Side Gate Drive With Slew Rate Control
  • Optional Frequency Shift by Varying an Analog Voltage or RT Resistor
  • Optional Synchronization to an External Clock
  • Optional Spread Spectrum
  • Shutdown Mode IQ: 10 µA Typical
  • Low Standby Mode IQ: 35 µA Typical
  • 75 mV Current Limit Threshold with ±0.9% Accuracy
  • External Resistor or DCR Current Sensing
  • Output Enable Logic Input
  • Hiccup Mode for Sustained Overload
  • Power Good Indication Output
  • Selectable Diode Emulation or Forced Pulse Width Modulation
  • QFN-24 Package with Wettable Flanks
  • Create a Custom Design Using the LM5141 With the WEBENCH® Power Designer
  • –40ºC to +125ºC Ambient Operating Temperature Range
  • An AEC-Q100 Qualified Device is Available
  • VIN 3.8 V to 65 V (70 V Absolute Maximum)
  • Output: Fixed 3.3 V, 5 V, or Adjustable From
    1.5 V - 15 V with ±0.8% Accuracy
  • Fixed 2.2 MHz or 440 kHz Switching Frequency with ±5% Accuracy
  • High-Side and Low-Side Gate Drive With Slew Rate Control
  • Optional Frequency Shift by Varying an Analog Voltage or RT Resistor
  • Optional Synchronization to an External Clock
  • Optional Spread Spectrum
  • Shutdown Mode IQ: 10 µA Typical
  • Low Standby Mode IQ: 35 µA Typical
  • 75 mV Current Limit Threshold with ±0.9% Accuracy
  • External Resistor or DCR Current Sensing
  • Output Enable Logic Input
  • Hiccup Mode for Sustained Overload
  • Power Good Indication Output
  • Selectable Diode Emulation or Forced Pulse Width Modulation
  • QFN-24 Package with Wettable Flanks
  • Create a Custom Design Using the LM5141 With the WEBENCH® Power Designer

The LM5141 is a synchronous buck controller, intended for high voltage wide VIN step-down converter applications. The control method is peak current mode control. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting, and ease of loop compensation. The LM5141 features slew rate control to simplify the compliance with EMI requirements.

The LM5141 has two selectable switching frequencies: 2.2 MHz and 440 kHz. Gate Drivers with Slew Rate Control that can be adjusted to reduce EMI.

In light or no-load conditions, the LM5141 operates in skip cycle mode for improved low power efficiency. The LM5141 has a high voltage bias regulator with automatic switch-over to an external bias to reduce the IQ current from VIN. Additional features include frequency synchronization, cycle-by-cycle current limit, hiccup mode fault protection for sustained overload, and power good output.

The LM5141 is a synchronous buck controller, intended for high voltage wide VIN step-down converter applications. The control method is peak current mode control. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting, and ease of loop compensation. The LM5141 features slew rate control to simplify the compliance with EMI requirements.

The LM5141 has two selectable switching frequencies: 2.2 MHz and 440 kHz. Gate Drivers with Slew Rate Control that can be adjusted to reduce EMI.

In light or no-load conditions, the LM5141 operates in skip cycle mode for improved low power efficiency. The LM5141 has a high voltage bias regulator with automatic switch-over to an external bias to reduce the IQ current from VIN. Additional features include frequency synchronization, cycle-by-cycle current limit, hiccup mode fault protection for sustained overload, and power good output.

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技術文件

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類型 標題 日期
* Data sheet LM5141 Wide Input Range Synchronous Buck Controller datasheet PDF | HTML 2017年 2月 2日
Application note Controller to Converter – Design Considerations for 24V and 48V Systems PDF | HTML 2024年 10月 2日
Functional safety information LM5141 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 2022年 4月 5日
E-book An Engineer’s Guide to Low EMI in DC/DC Regulators 2021年 4月 21日
Selection guide Buck Converter Quick Reference Guide (Rev. B) 2021年 4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
White paper An overview of radiated EMI specifications for power supplies 2018年 6月 5日
White paper An overview of conducted EMI specifications for power supplies 2018年 2月 1日
EVM User's guide LM5141-Q1 EVM User’s Guide (Rev. A) 2018年 1月 10日
Application brief Improve DC/DC Regulator EMI for Free with Optimized Power Stage Layout 2017年 11月 13日
Technical article Create a power supply for an MRI application PDF | HTML 2017年 8月 14日
Analog Design Journal Designing the front-end DC/DC conversion stage to withstand automotive transient 2017年 1月 18日
Analog Design Journal Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics 2016年 7月 21日
Application note Precision Output Current Limiting Using Average Current Monitor Feature 2011年 6月 21日

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

LM5141QRGEVM — LM5141QRG 同步降壓轉換器評估模組

The LM5141QRGEVM evaluation board provides a fully functional buck power supply, employing peak current mode control. The evaluation board provides a 5.0V @ 5A. The nonomal input voltage range is 8V-18V.
使用指南: PDF
TI.com 無法提供
模擬型號

LM5141-Q1 and LM25141-Q1 PSpice Transient Model (Rev. A)

SNVMAU4A.ZIP (123 KB) - PSpice Model
下載
計算工具

LM5141DESIGN-CALC — LM5141-Q1 controller quickstart design tool

Welcome to the LM5141-Q1 quickstart design tool. This standalone tool facilitates and assists the power supply engineer with design of a DC/DC buck regulator based on the LM5141-Q1 65-V synchronous buck DC/DC controller with low IQ. As such, the user can expeditiously arrive at an optimized design (...)
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支援產品和硬體

產品
AC/DC 和 DC/DC 控制器 (外部 FET)
LM5141 — 低 Iq、寬輸入範圍雙同步降壓控制器 LM5141-Q1 — 車用寬輸入 2.2-MHz 低 IQ 同步降壓控制器
硬體開發
開發板
LM5141QRGEVM — LM5141QRG 同步降壓轉換器評估模組
軟體
計算工具
LM5141DESIGN-CALC — LM5141-Q1 控制器快速入門設計工具
下載
參考設計

TIDEP-01022 — 閘道車用參考設計

Automotive trends are rapidly evolving, and as a result, new domain- and zonal-based gateway architectures are being used to efficiently handle the ever-increasing amount of data coming into and moving throughout the vehicle, and getting sent to the cloud. A properly functioning domain (or zonal) (...)
Design guide: PDF
電路圖: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
VQFN (RGE) 24 Ultra Librarian
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