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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

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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

Rating Automotive Topology Buck Controller Iout (max) (A) 30 Vin (max) (V) 42 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 150 Iq (typ) (µA) 35 Duty cycle (max) (%) 96 Number of phases 1 TI functional safety category Functional Safety-Capable EMI features Spread Spectrum
Rating Automotive Topology Buck Controller Iout (max) (A) 30 Vin (max) (V) 42 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 150 Iq (typ) (µA) 35 Duty cycle (max) (%) 96 Number of phases 1 TI functional safety category Functional Safety-Capable EMI features Spread Spectrum
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
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

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

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
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開發板
  • LM5141QRGEVM — LM5141QRG 同步降壓轉換器評估模組
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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

此參考設計運用含頻率展頻的同步降壓控制器，是一款適合汽車應用的同步降壓轉換器。此設計採用電源 SO-8 封裝的雙 MOSFET。強制脈衝寬度調變 (FPWM) 或二極體模擬模式 (DEMB) 可選擇跨接器。功能包括啟用輸入和電源良好旗標。切換頻率設為 440 kHz。頻率抖動及輸入濾波有助於提升 EMI 性能。經修改的頻率補償支援所有陶瓷輸出電容器。
Test report: PDF
電路圖: PDF
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VQFN (RGE) 24 Ultra Librarian
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