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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

Rating Catalog Topology Buck Iout (max) (A) 20 Vin (max) (V) 65 Vin (min) (V) 3.8 Vout (max) (V) 15 Vout (min) (V) 1.5 Control mode current mode Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Power good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification, UVLO Fixed Operating temperature range (°C) -40 to 125 Iq (typ) (µA) 35 Duty cycle (max) (%) 96 Number of phases 1 EMI features Spread Spectrum
Rating Catalog Topology Buck Iout (max) (A) 20 Vin (max) (V) 65 Vin (min) (V) 3.8 Vout (max) (V) 15 Vout (min) (V) 1.5 Control mode current mode Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Power good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification, UVLO Fixed Operating temperature range (°C) -40 to 125 Iq (typ) (µA) 35 Duty cycle (max) (%) 96 Number of phases 1 EMI features Spread Spectrum
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
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

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開發板

LM5141QRGEVM — LM5141QRG 同步降壓轉換器評估模組

LM5141QRGEVM 評估板提供全功能降壓電源供應器，採用峰值電流模式控制。評估板提供 5.0V @ 5A。額定輸入電壓範圍為 8V-18V。
使用指南: PDF
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模擬型號

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

SNVMAU4A.ZIP (123 KB) - PSpice Model
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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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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
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參考設計

TIDEP-01022 — 閘道車用參考設計

汽車行業發展迅速，因此，新的基於網域和基於區域的閘道架構被用於有效處理不斷增加的資料量，這些資料在車輛中產生和傳輸，並發送到雲端。正常運作的網域（或區域）閘道安全可靠地促進功能網域/區域內 ECU 與集中式閘道間的資料傳輸。集中式閘道可在車輛眾多網域/區域間安全可靠地傳輸資料。

此 TIDEP-01022 汽車閘道參考設計 (GCARD) 是一款易於使用的 8 層 PCB 詳細設計，可做為集中式、網域或區域控制器使用，並以 Jacinto™ 7 DRA821 處理器為基礎。此平台可做為汽車領域的 OEM 與一級供應商輕鬆快速地建立全功能 DRA821 解決方案的基礎。

DRA821 (...)

Design guide: PDF
電路圖: PDF
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VQFN (RGE) 24 Ultra Librarian
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