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DC/DC 轉換器

LMQ66430

現行

具有 1.5-µA IQ 的 36-V、3-A 低 EMI 同步降壓轉換器

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產品規格表

LMQ66430

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Buck Iout (max) (A) 3 Vin (max) (V) 36 Vin (min) (V) 3 Vout (max) (V) 35 Vout (min) (V) 1 Features Enable, Fixed Output, Fixed soft start, Light-load efficiency, Overcurrent protection, Power good, Spread Spectrum, Synchronous rectification EMI features Fixed-frequency control, Integrated capacitors, Low parasitic packaging, Mitigated interference & noise technology – architecture 2 (MINT 2), Pinout optimization, Spread Spectrum, Switch-node waveshaping Control mode current mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0000015 Duty cycle (max) (%) 98 TI functional safety category Functional Safety-Capable Sector Robotics, Test & measurement
Rating Catalog Topology Buck Iout (max) (A) 3 Vin (max) (V) 36 Vin (min) (V) 3 Vout (max) (V) 35 Vout (min) (V) 1 Features Enable, Fixed Output, Fixed soft start, Light-load efficiency, Overcurrent protection, Power good, Spread Spectrum, Synchronous rectification EMI features Fixed-frequency control, Integrated capacitors, Low parasitic packaging, Mitigated interference & noise technology – architecture 2 (MINT 2), Pinout optimization, Spread Spectrum, Switch-node waveshaping Control mode current mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0000015 Duty cycle (max) (%) 98 TI functional safety category Functional Safety-Capable Sector Robotics, Test & measurement
VQFN-FCRLF (RXB) 14 6.76 mm² (2.6 mm × 2.6 mm)
  • Functional Safety-Capable
  • Designed for industrial applications:
    • Junction temperature range –40°C to +150°C
    • NC pin between critical pins for better reliability
    • Best in-class pin FMEA
    • Input transient protection up to 42V
    • Wide input voltage range after start-up: 2.7V (falling threshold) to 36V
    • Adjustable output up to 95% of VIN, 3.3V and 5V fixed VOUT options available
  • ZEN 2 switcher
    • Integrated bypass and boot capacitors reduce EMI
    • Dual random spread spectrum reduces peak emissions
    • Enhanced HotRod™ QFN package minimizes switch node ringing
    • Adjustable FSW: 200kHz – 2.2MHz with RT pin
  • Greater than 85% efficiency at 1mA
  • Miniature design size and low component cost:
    • Integrated input bypass capacitors and bootstrap capacitor reducing EMI
    • 2.6mm × 2.6mm enhanced HotRod QFN package with wettable flanks
    • Internal control loop compensation
  • Functional Safety-Capable
  • Designed for industrial applications:
    • Junction temperature range –40°C to +150°C
    • NC pin between critical pins for better reliability
    • Best in-class pin FMEA
    • Input transient protection up to 42V
    • Wide input voltage range after start-up: 2.7V (falling threshold) to 36V
    • Adjustable output up to 95% of VIN, 3.3V and 5V fixed VOUT options available
  • ZEN 2 switcher
    • Integrated bypass and boot capacitors reduce EMI
    • Dual random spread spectrum reduces peak emissions
    • Enhanced HotRod™ QFN package minimizes switch node ringing
    • Adjustable FSW: 200kHz – 2.2MHz with RT pin
  • Greater than 85% efficiency at 1mA
  • Miniature design size and low component cost:
    • Integrated input bypass capacitors and bootstrap capacitor reducing EMI
    • 2.6mm × 2.6mm enhanced HotRod QFN package with wettable flanks
    • Internal control loop compensation

The LMQ664x0 is the industry smallest 36V, 3A (available in 2A and 1A variants) synchronous step-down DC/DC converter with an integrated bypass and bootstrap capacitor in an enhanced HotRod QFN package. This easy-to-use converter supports a wide input voltage range of 2.7V to 36V (after start-up or after operating) with transients up to 42V.

The LMQ664x0 is specifically designed to meet low standby power requirements for always-on, industrial applications. Auto mode enables frequency foldback when operating at light loads, allowing an unloaded typical current consumption of 1.5µA at 13.5VIN and high light load efficiency. A seamless transition between PWM and PFM modes along with very low MOSFET ON resistances makes sure there is exceptional efficiency across the entire load range. The control architecture (peak current mode) and feature set are optimized for an ultra-small design size with minimal output capacitance. The device minimizes input filter size by using dual-random spread spectrum (DRSS), a low-EMI enhanced HotRod QFN package, and an optimized pinout. The RT pin can be used to set the frequency to avoid noise sensitive frequency bands. There are NC pins between critical high voltage pins, reducing potential failures (excellent choice pin FMEA). ZEN 2 switcher features enable the device to support ultra low-EMI applications. The rich feature set of the LMQ664x0 is designed to simplify implementation for a wide range of industrial end equipment.

The LMQ664x0 is the industry smallest 36V, 3A (available in 2A and 1A variants) synchronous step-down DC/DC converter with an integrated bypass and bootstrap capacitor in an enhanced HotRod QFN package. This easy-to-use converter supports a wide input voltage range of 2.7V to 36V (after start-up or after operating) with transients up to 42V.

The LMQ664x0 is specifically designed to meet low standby power requirements for always-on, industrial applications. Auto mode enables frequency foldback when operating at light loads, allowing an unloaded typical current consumption of 1.5µA at 13.5VIN and high light load efficiency. A seamless transition between PWM and PFM modes along with very low MOSFET ON resistances makes sure there is exceptional efficiency across the entire load range. The control architecture (peak current mode) and feature set are optimized for an ultra-small design size with minimal output capacitance. The device minimizes input filter size by using dual-random spread spectrum (DRSS), a low-EMI enhanced HotRod QFN package, and an optimized pinout. The RT pin can be used to set the frequency to avoid noise sensitive frequency bands. There are NC pins between critical high voltage pins, reducing potential failures (excellent choice pin FMEA). ZEN 2 switcher features enable the device to support ultra low-EMI applications. The rich feature set of the LMQ664x0 is designed to simplify implementation for a wide range of industrial end equipment.
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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 LMQ664x0 36V, 1A, 2A, and 3A, Ultra-Small, Synchronous ZEN 2 Step-Down Converter With Integrated VIN Bypass and CBOOT Capacitors datasheet (Rev. C) PDF | HTML 2025/12/9
功能安全資訊 LMQ664x0 and LMQ664x0-Q1 Functional Safety FIT Rate, FMD and Pin FMA (Rev. A) PDF | HTML 2024/11/5
Application brief Step-Down Converter Capacitor Integration Reducing Effort for CISPR 25 Class 5 Compliance PDF | HTML 2023/1/18
技術文章 How buck regulators with integrated capacitors help lower EMI and save board space PDF | HTML 2022/3/16
證書 LMQ66430EVM-2M EU RoHS Declaration of Conformity (DoC) 2021/10/21

設計與開發

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開發板

LMQ66430-2EVM — 具強化型 HotRod™ QFN、適用於 36-V 3-A 同步降壓轉換器的 LMQ66430 評估模組

LMQ66430-2EVM 評估模組 (EVM) 有助於設計人員評估 LMQ66430-Q1 裝置的運作和性能，而這是一款同步降壓 DC/DC 轉換器，能夠從高達 36V 的輸入電壓驅動高達 3A 的負載電流。此外，LMQ66430-Q1 具有超低運作靜態電流，輕負載時提供高效率，並且採用小型 2.6mm × 2.6mm 強化型 HotRod™ QFN 封裝，提供低 EMI 解決方案尺寸。

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LMQ66430 PSpice Transient Model

SNVMCA9.ZIP (161 KB) - PSpice 模型
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VQFN-FCRLF (RXB) 14 Ultra Librarian
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