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LMR66430

現行

具 1.5uA IQ 與低 EMI 的 36V、3A 同步降壓轉換器

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產品規格表

LMR66430

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 3 Vin (min) (V) 3 Vin (max) (V) 36 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Enable, Fixed Output, Forced PWM, Frequency synchronization, Light Load Efficiency, Low Noise, Over Current Protection, Power good, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, UVLO adjustable, Wettable flanks package Control mode current mode Vout (min) (V) 1 Vout (max) (V) 35 Iq (typ) (µA) 1.5 Duty cycle (max) (%) 98
Rating Catalog Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 3 Vin (min) (V) 3 Vin (max) (V) 36 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Enable, Fixed Output, Forced PWM, Frequency synchronization, Light Load Efficiency, Low Noise, Over Current Protection, Power good, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, UVLO adjustable, Wettable flanks package Control mode current mode Vout (min) (V) 1 Vout (max) (V) 35 Iq (typ) (µA) 1.5 Duty cycle (max) (%) 98
VQFN-FCRLF (RXB) 14 6.76 mm² 2.6 x 2.6
  • 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 42 V
    • Wide input voltage range after start-up: 2.7 V (falling threshold) to 36 V
    • Adjustable output up to 95% of VIN, 3.3-V, and 5-V fixed VOUT options available
  • Optimized for low EMI requirements:
    • Dual random spread spectrum reduces peak emissions
    • Enhanced HotRod™ QFN package minimizes switch node ringing
  • Greater than 85% efficiency at 1 mA
  • Miniature design size and low component cost:
    • 2.6-mm × 2.6-mm 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 42 V
    • Wide input voltage range after start-up: 2.7 V (falling threshold) to 36 V
    • Adjustable output up to 95% of VIN, 3.3-V, and 5-V fixed VOUT options available
  • Optimized for low EMI requirements:
    • Dual random spread spectrum reduces peak emissions
    • Enhanced HotRod™ QFN package minimizes switch node ringing
  • Greater than 85% efficiency at 1 mA
  • Miniature design size and low component cost:
    • 2.6-mm × 2.6-mm enhanced HotRod QFN package with wettable flanks
    • Internal control loop compensation

The LMR664x0 is a small 36-V, 3-A (available in 2-A and 1-A variants) synchronous step-down DC/DC converter in an enhanced HotRod QFN package. This easy-to-use converter supports a wide input voltage range of 2.7 V to 36 V (after start-up or after operating) with transients up to 42 V.

The LMR664x0 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 1.5 µA at 13.5 VIN 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 pin-out. The MODE/SYNC and RT pin variants can be used to set or synchronize the frequency to avoid noise sensitive frequency bands. There are NC pins between critical high voltage pins, reducing potential failures (optimal pin FMEA). The rich feature set of the LMR664x0 is designed to simplify implementation for a wide range of industrial end equipment.

The LMR664x0 is a small 36-V, 3-A (available in 2-A and 1-A variants) synchronous step-down DC/DC converter in an enhanced HotRod QFN package. This easy-to-use converter supports a wide input voltage range of 2.7 V to 36 V (after start-up or after operating) with transients up to 42 V.

The LMR664x0 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 1.5 µA at 13.5 VIN 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 pin-out. The MODE/SYNC and RT pin variants can be used to set or synchronize the frequency to avoid noise sensitive frequency bands. There are NC pins between critical high voltage pins, reducing potential failures (optimal pin FMEA). The rich feature set of the LMR664x0 is designed to simplify implementation for a wide range of industrial end equipment.
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類型 標題 日期
* Data sheet LMR664x0 36-V, 1-A, 2-A, and 3-A, Ultra-Small, Synchronous Step-Down Converter datasheet PDF | HTML 2023年 12月 8日
Functional safety information LMR66430, LMR66430-Q1 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML 2023年 11月 17日
Application brief Step-Down Converter Capacitor Integration Reducing Effort for CISPR 25 Class 5 Compliance PDF | HTML 2023年 1月 18日

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開發板

LMR66430-2EVM — 適用於頻率為 2-Mhz 的 36-V、3-A 同步降壓轉換器的 LMR66430 評估模組

LMR66430-2 評估模組 (EVM) 是一個評估 LMR66430 降壓轉換器的平台，其中包含數個跨接器和測試點，可快速配置裝置，並測試其各種功能。除了評估 LMR66430 的電氣性能外，此 EVM 也應做為在終端使用者應用中運用電路設計與佈線圖的範例。

使用指南: PDF | HTML
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LMR66430-2EVM Design Files

SNVR531.ZIP (4362 KB)
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VQFN-FCRLF (RXB) 14 Ultra Librarian
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  • 進行中持續性的可靠性監測
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