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AC/DC 和 DC/DC 控制器 (外部 FET)

LM25141-Q1

現行

具頻率展頻的車用 2.2-MHz，低 IQ 同步降壓控制器

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產品規格表

現在提供此產品的更新版本

open-in-new 比較替代產品
功能相同，但引腳輸出與所比較的裝置不同
LM25149-Q1 現行 具超低 IQ 和整合式主動 EMI 濾波器的 42-V 車用同步降壓 DC/DC 控制器 Improved EMI performance and reduces filter size.

LM25141-Q1

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) 42 Iout (max) (A) 30 Operating temperature range (°C) -40 to 150 Control mode current mode Topology Buck Controller Rating Automotive 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 TI functional safety category Functional Safety-Capable
Vin (min) (V) 3.8 Vin (max) (V) 42 Iout (max) (A) 30 Operating temperature range (°C) -40 to 150 Control mode current mode Topology Buck Controller Rating Automotive 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 TI functional safety category Functional Safety-Capable
VQFN (RGE) 24 16 mm² 4 x 4
  • AEC-Q100 Qualified for Automotive Applications:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C4B
  • VIN 3.8 V to 42 V (47 V Absolute Maximum)
  • Output: Fixed 3.3 V, 5 V, or Adjustable From
    1.5 V to 15 V With ±0.8% Accuracy
  • Optional Frequency Shift by Varying an Analog Voltage or RT Resistor
  • Meets CISPR 25 / EN 55025 EMI Standards
    • Fixed 2.2-MHz or 440-kHz Switching Frequency With ±5% Accuracy
    • High-Side and Low-Side Gate Drive With Slew Rate Control
    • Optional Spread Spectrum
  • Optional Synchronization to an External Clock
  • 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 PWM
  • VQFN-24 Package With Wettable Flanks
  • Create a Custom Design Using the LM25141-Q1 With the WEBENCH® Power Designer
  • AEC-Q100 Qualified for Automotive Applications:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C4B
  • VIN 3.8 V to 42 V (47 V Absolute Maximum)
  • Output: Fixed 3.3 V, 5 V, or Adjustable From
    1.5 V to 15 V With ±0.8% Accuracy
  • Optional Frequency Shift by Varying an Analog Voltage or RT Resistor
  • Meets CISPR 25 / EN 55025 EMI Standards
    • Fixed 2.2-MHz or 440-kHz Switching Frequency With ±5% Accuracy
    • High-Side and Low-Side Gate Drive With Slew Rate Control
    • Optional Spread Spectrum
  • Optional Synchronization to an External Clock
  • 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 PWM
  • VQFN-24 Package With Wettable Flanks
  • Create a Custom Design Using the LM25141-Q1 With the WEBENCH® Power Designer

The LM25141-Q1 is a synchronous buck controller, intended for high-voltage, wide-VIN, step-down regulator 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 LM25141-Q1 features slew rate control to simplify the compliance with CISPR and automotive EMI requirements.

The LM25141-Q1 has two selectable switching frequencies: 2.2 MHz and 440 kHz. Gate drivers with slew rate control can be adjusted to reduce EMI.

In light or no-load conditions, the LM25141-Q1 operates in skip cycle mode for improved low power efficiency. The LM25141-Q1 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 LM25141-Q1 is a synchronous buck controller, intended for high-voltage, wide-VIN, step-down regulator 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 LM25141-Q1 features slew rate control to simplify the compliance with CISPR and automotive EMI requirements.

The LM25141-Q1 has two selectable switching frequencies: 2.2 MHz and 440 kHz. Gate drivers with slew rate control can be adjusted to reduce EMI.

In light or no-load conditions, the LM25141-Q1 operates in skip cycle mode for improved low power efficiency. The LM25141-Q1 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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類型 標題 日期
* Data sheet LM25141-Q1 2.2-MHz, 42-V Synchronous Buck Controller With Low IQ datasheet (Rev. A) PDF | HTML 2018年 2月 7日
Functional safety information LM25141-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. A) PDF | HTML 2022年 5月 10日
E-book An Engineer’s Guide to Low EMI in DC/DC Regulators 2021年 4月 21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
Test report PMP15019 Test Results 2017年 2月 28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

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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
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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

LM25141DESIGN-CALC — LM25141-Q1 controller quickstart design tool

Welcome to the LM25141-Q1 quickstart calculator design tool. This standalone tool facilitates and assists the power supply engineer with design of a DC/DC buck regulator based on the LM25141-Q1 42-V synchronous buck DC/DC controller with low IQ. As such, the user can expeditiously arrive at an (...)
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產品
AC/DC 和 DC/DC 控制器 (外部 FET)
LM25141 — 低 Iq、寬輸入範圍雙同步降壓控制器 LM25141-Q1 — 具頻率展頻的車用 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
LM25141DESIGN-CALC — LM25141-Q1 控制器快速入門設計工具
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參考設計

PMP21107 — 具有頻率展頻的寬輸入同步降壓轉換器參考設計

This reference design is a synchronous buck converter for automotive applications utilizing a synchronous buck controller with frequency spread spectrum. The design uses a dual MOSFET in power SO-8 package. Forced pulse width modulation (FPWM) or diode emulation mode (DEMB) is jumper selectable. (...)
Test report: PDF
電路圖: PDF
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VQFN (RGE) 24 Ultra Librarian
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