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AC/DC 和 DC/DC 轉換器 (整合式 FET)

LMR51440

現行

36-V、4-A 同步降壓轉換器

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產品規格表

LMR51440

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) 4 Vin (min) (V) 4 Vin (max) (V) 36 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1100 Features Enable, Forced PWM, Light Load Efficiency, Power good, Spread Spectrum, Synchronous Rectification, UVLO adjustable EMI features Spread Spectrum Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 28 Iq (typ) (µA) 25 Duty cycle (max) (%) 97.4
Rating Catalog Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 4 Vin (min) (V) 4 Vin (max) (V) 36 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1100 Features Enable, Forced PWM, Light Load Efficiency, Power good, Spread Spectrum, Synchronous Rectification, UVLO adjustable EMI features Spread Spectrum Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 28 Iq (typ) (µA) 25 Duty cycle (max) (%) 97.4
WSON (DRR) 12 9 mm² 3 x 3
  • Functional Safety-Capable
  • Configured for rugged industrial applications
    • Wide Input voltage range: 4 V to 36 V
    • 4-A or 5-A continuous output current
    • ±1.0% tolerance voltage reference at room temperature
    • Minimum switching-on time: 75 ns (typical)
    • Low Quiescent current: 25 µA
    • Adjustable Frequency: 200 kHz to 1.1 MHz
    • Frequency spread spectrum (PFM variant)
    • Protection features
      • Precision enable input
      • Open-drain PGOOD
      • VIN undervoltage lockout (UVLO)
      • Cycle-by-cycle current limiting
      • Short-circuit protection with hiccup mode
      • Thermal shutdown
    • Low dropout mode operation
    • Junction temperature range: –40°C to 150°C
  • Small solution size and ease of use
    • Integrated synchronous rectification
    • Internal compensation for ease of use
    • WSON-12 package
  • Various options in pin-to-pin compatible package
    • PFM and forced PWM (FPWM) options
  • Create a custom design using the LMR5144x0 with the WEBENCH® Power Designer
  • Functional Safety-Capable
  • Configured for rugged industrial applications
    • Wide Input voltage range: 4 V to 36 V
    • 4-A or 5-A continuous output current
    • ±1.0% tolerance voltage reference at room temperature
    • Minimum switching-on time: 75 ns (typical)
    • Low Quiescent current: 25 µA
    • Adjustable Frequency: 200 kHz to 1.1 MHz
    • Frequency spread spectrum (PFM variant)
    • Protection features
      • Precision enable input
      • Open-drain PGOOD
      • VIN undervoltage lockout (UVLO)
      • Cycle-by-cycle current limiting
      • Short-circuit protection with hiccup mode
      • Thermal shutdown
    • Low dropout mode operation
    • Junction temperature range: –40°C to 150°C
  • Small solution size and ease of use
    • Integrated synchronous rectification
    • Internal compensation for ease of use
    • WSON-12 package
  • Various options in pin-to-pin compatible package
    • PFM and forced PWM (FPWM) options
  • Create a custom design using the LMR5144x0 with the WEBENCH® Power Designer

The LMR514x0 is a wide-VIN, easy-to-use synchronous buck converter capable of driving up to 4-A or 5-A load current. With a wide input range of 4 V to 36 V, the device is suitable for a wide range of industrial applications for power conditioning from an unregulated source.

The LMR514x0 features adjustable switching frequency from 200 kHz to 1.1 MHz with an external resistor, which provides the flexibility to optimize either efficiency or external component size. The device has PFM version to realize high efficiency at light load and FPWM version to achieve constant frequency, and small output voltage ripple over the full load range. Soft-start and compensation circuits are implemented internally which allows the device to be used with minimum external components.

The device has built-in protection features, such as cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown in case of excessive power dissipation. The LMR514x0 is available in WSON-12 package.

The LMR514x0 is a wide-VIN, easy-to-use synchronous buck converter capable of driving up to 4-A or 5-A load current. With a wide input range of 4 V to 36 V, the device is suitable for a wide range of industrial applications for power conditioning from an unregulated source.

The LMR514x0 features adjustable switching frequency from 200 kHz to 1.1 MHz with an external resistor, which provides the flexibility to optimize either efficiency or external component size. The device has PFM version to realize high efficiency at light load and FPWM version to achieve constant frequency, and small output voltage ripple over the full load range. Soft-start and compensation circuits are implemented internally which allows the device to be used with minimum external components.

The device has built-in protection features, such as cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown in case of excessive power dissipation. The LMR514x0 is available in WSON-12 package.
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類型 標題 日期
* Data sheet LMR514x0, 36-V, 4-A/5-A Synchronous Step-Down DC/DC Converter With Low IQ datasheet PDF | HTML 2022年 12月 5日
Functional safety information LMR51440 and LMR51450 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML 2022年 11月 21日

設計與開發

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開發板

LMR51450EVM — LMR51450 同步降壓轉換器評估模組

LMR51450 評估模組 (EVM) 的設計旨在協助客戶評估 LMR51450 同步降壓電壓轉換器的性能。此 EVM 以 12 針腳 WSON 封裝實作 LMR51450。EVM 能夠在非常小的解決方案尺寸中以高效率和輸出準確度來提供 5 V 或 3.3 V 輸出電壓，和高達 5 A 負載電流。
使用指南: PDF | HTML
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計算工具

LMR51440-CALC — LMR51440 calculation tool

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產品
AC/DC 和 DC/DC 轉換器 (整合式 FET)
LMR51440 — 36-V、4-A 同步降壓轉換器
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