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AC/DC 和 DC/DC 轉換器 (整合式 FET)

LMR51420

現行

具有 4.5V 至 36V、2A、同步降壓和 40µA IQ 的 SIMPLE SWITCHER® 電源轉換器

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產品規格表

LMR51420

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) 2 Vin (min) (V) 4.5 Vin (max) (V) 36 Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 1100 Features Enable, Forced PWM, Light Load Efficiency, Over Current Protection, Synchronous Rectification Control mode current mode Vout (min) (V) 0.6 Vout (max) (V) 34.2 Iq (typ) (µA) 40 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) 2 Vin (min) (V) 4.5 Vin (max) (V) 36 Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 1100 Features Enable, Forced PWM, Light Load Efficiency, Over Current Protection, Synchronous Rectification Control mode current mode Vout (min) (V) 0.6 Vout (max) (V) 34.2 Iq (typ) (µA) 40 Duty cycle (max) (%) 98
SOT-23-THN (DDC) 6 8.12 mm² 2.9 x 2.8
  • Functional Safety-Capable
  • Configured for rugged industrial applications
    • 4.5-V to 36-V input voltage range
    • 2-A continuous output current
    • 70-ns minimum switching on time
    • 500-kHz and 1.1-MHz fixed switching frequency options
    • –40°C to 150°C junction temperature range
    • 98% maximum duty cycle
    • Start-up with prebiased output
    • Internal short circuit protection with hiccup mode
    • ±1.5% tolerance voltage reference
    • Precision enable
  • Small solution size and ease of use
    • Integrated synchronous rectification
    • Internal compensation for ease of use
    • SOT-23 package
  • Pin-to-pin compatible with the TPS54202 and TPS54302
  • PFM and forced PWM (FPWM) options available
  • Create a custom design using the LMR51420 with the WEBENCH Power Designer
  • Functional Safety-Capable
  • Configured for rugged industrial applications
    • 4.5-V to 36-V input voltage range
    • 2-A continuous output current
    • 70-ns minimum switching on time
    • 500-kHz and 1.1-MHz fixed switching frequency options
    • –40°C to 150°C junction temperature range
    • 98% maximum duty cycle
    • Start-up with prebiased output
    • Internal short circuit protection with hiccup mode
    • ±1.5% tolerance voltage reference
    • Precision enable
  • Small solution size and ease of use
    • Integrated synchronous rectification
    • Internal compensation for ease of use
    • SOT-23 package
  • Pin-to-pin compatible with the TPS54202 and TPS54302
  • PFM and forced PWM (FPWM) options available
  • Create a custom design using the LMR51420 with the WEBENCH Power Designer

The LMR51420 is a wide-VIN, easy-to-use SIMPLE SWITCHER power converter synchronous buck converter capable of driving up to 2-A load current. With a wide input range of 4.5 V to 36 V, the device is suitable for a wide range of industrial applications for power conditioning from an unregulated source.

The LMR51420 operates at 500-kHz and 1.1-MHz switching frequency to support use of relatively small inductors for an optimized solution size. The device has a 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 LMR51420 is available in a 6-pin SOT-23 package.

The LMR51420 is a wide-VIN, easy-to-use SIMPLE SWITCHER power converter synchronous buck converter capable of driving up to 2-A load current. With a wide input range of 4.5 V to 36 V, the device is suitable for a wide range of industrial applications for power conditioning from an unregulated source.

The LMR51420 operates at 500-kHz and 1.1-MHz switching frequency to support use of relatively small inductors for an optimized solution size. The device has a 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 LMR51420 is available in a 6-pin SOT-23 package.
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技術文件

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類型 標題 日期
* Data sheet LMR51420 SIMPLE SWITCHER® Power Converter 4.5-V to 36-V, 2-A, Synchronous Buck datasheet (Rev. C) 2022年 11月 23日
Functional safety information LMR514x0 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 2021年 10月 15日
User guide LMR51420EVM User's Guide PDF | HTML 2021年 10月 13日

設計與開發

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開發板

LMR51420EVM — LMR51420 評估模組 4.5-V 至 36-V、2-A 同步降壓轉換器

LMR51420EVM 是完全組裝且經過測試的電路，可用於評估 LMR51420 降壓轉換器。基板將設為 5-V Vout。基板也具備用於環路量測的 AC 訊號注入端子。
使用指南: PDF | HTML
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模擬型號

LM51420X PSpice Transient Model

SLUM848.ZIP (358 KB) - PSpice Model
下載
模擬型號

LMR51420XF PSpice Transient Model

SLUM825.ZIP (288 KB) - PSpice Model
下載
參考設計

PMP41037 — 具有 GaN 和 C2000 的 1kW、800V 至 12V 序列半橋雙向 DCX 參考設計

此參考設計為 1kW 雙向 DC 變壓器 (DCX)，可以隔離方式將 800V DC 匯流排轉換至 12V。此設計由 F280039C 控制，並持續以諧振腔的諧振頻率運作。一次側使用 LMG3622 GaN 序列半橋來處理最高 900V 的 DC 電壓。序列半橋 (SHB) 可修改為全橋，並將高壓側從 800V 變更為 400V。序列半橋可實現各種 PWM 策略，並且可控制彈性。
Test report: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
SOT-23-THN (DDC) 6 Ultra Librarian
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  • 鉛塗層/球物料
  • MSL 等級/回焊峰值
  • MTBF/FIT 估算值
  • 材料內容
  • 認證摘要
  • 進行中持續性的可靠性監測
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