LMR54410

現行

具 80-µA IQ 的 SIMPLE SWITCHER® 電源轉換器 4.5-V 至 36-V、1-A 同步降壓

產品詳細資料

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 1 Vin (min) (V) 4 Vin (max) (V) 36 Switching frequency (min) (kHz) 1100 Switching frequency (max) (kHz) 1100 Features Enable, Forced PWM, Light Load Efficiency, Over Current Protection, Pre-Bias Start-Up, Soft Start Fixed, Synchronous Rectification Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 28 Iq (typ) (µA) 80 Duty cycle (max) (%) 98
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 1 Vin (min) (V) 4 Vin (max) (V) 36 Switching frequency (min) (kHz) 1100 Switching frequency (max) (kHz) 1100 Features Enable, Forced PWM, Light Load Efficiency, Over Current Protection, Pre-Bias Start-Up, Soft Start Fixed, Synchronous Rectification Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 28 Iq (typ) (µA) 80 Duty cycle (max) (%) 98
SOT-23 (DBV) 6 8.12 mm² 2.9 x 2.8
  • Functional Safety-Capable
  • Configured for rugged industrial applications
    • 4V to 36V input voltage range
    • Withstands up to 50V short VIN transient
    • 0.6A/1A continuous output current
    • 60ns minimum switching on time
    • 1.1MHz fixed switching frequency
    • –40°C to 150°C junction temperature range
    • 98% maximum duty cycle
    • Monotonic start-up with prebiased output
    • Short-circuit protection with hiccup mode
    • Precision enable
    • ±1% tolerance voltage reference
  • Small design size and ease of use
    • Integrated synchronous rectification
    • Internal compensation for ease of use
    • SOT-23 package
  • Pin-to-pin compatible with the LMR14010A, LMR50410, and TPS560430
  • Various options in pin-to-pin compatible package
    • PFM and forced PWM (FPWM) options
  • Functional Safety-Capable
  • Configured for rugged industrial applications
    • 4V to 36V input voltage range
    • Withstands up to 50V short VIN transient
    • 0.6A/1A continuous output current
    • 60ns minimum switching on time
    • 1.1MHz fixed switching frequency
    • –40°C to 150°C junction temperature range
    • 98% maximum duty cycle
    • Monotonic start-up with prebiased output
    • Short-circuit protection with hiccup mode
    • Precision enable
    • ±1% tolerance voltage reference
  • Small design size and ease of use
    • Integrated synchronous rectification
    • Internal compensation for ease of use
    • SOT-23 package
  • Pin-to-pin compatible with the LMR14010A, LMR50410, and TPS560430
  • Various options in pin-to-pin compatible package
    • PFM and forced PWM (FPWM) options

The LMR544xx is a wide-VIN, easy-to-use synchronous buck converter capable of driving up to 1A and 0.6A load current. With a wide input range of 4V to 36V, the device is designed for a wide range of industrial applications for power conditioning from an unregulated source.

The LMR544xx operates at 1.1MHz switching frequency to support use of relatively small inductors for an optimized design size. The devices have a PFM version to realize high efficiency at light load and a 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 allow the device to be used with minimal 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 LMR544xx is a wide-VIN, easy-to-use synchronous buck converter capable of driving up to 1A and 0.6A load current. With a wide input range of 4V to 36V, the device is designed for a wide range of industrial applications for power conditioning from an unregulated source.

The LMR544xx operates at 1.1MHz switching frequency to support use of relatively small inductors for an optimized design size. The devices have a PFM version to realize high efficiency at light load and a 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 allow the device to be used with minimal 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.

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技術文件

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類型 標題 日期
* Data sheet LMR544xx SIMPLE SWITCHER Power Converter 4V to 45V, 0.6A/1A Buck Converter in a SOT-23 Package datasheet (Rev. D) PDF | HTML 2024年 4月 10日
White paper Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) PDF | HTML 2024年 4月 30日
Certificate LMR54410EVM EU RoHS Declaration of Conformity (DoC) 2021年 11月 16日
User guide LMR54410EVM User's Guide PDF | HTML 2021年 10月 15日
Functional safety information LMR544xx Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 2021年 10月 15日

設計與開發

如需其他條款或必要資源,請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

LMR50410EVM — 4-V 至 36-V、1-A 同步降壓轉換器評估模組

The LMR50410EVM evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LMR50410 step-down converter. The board is set as a 3.3-V Vout. The board also has AC signal injection terminals for loop measurements.
使用指南: PDF
TI.com 無法提供
開發板

LMR54410EVM — 具有 4-V 至 36-V、1-A 同步降壓轉換器的 LMR54410 評估模組

LMR54410EVM 是完全組裝且經過測試的電路,可用於評估 LMR54410 降壓轉換器。此電路板具有跨接器連接器,可用於觸發針腳,並可提供上拉裝置至 VIN 或外部高電平啟用。基板將設為 3.3-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
TI.com 無法提供
模擬型號

LMR54410 PSpice Transient Model (Rev. A)

SLUM799A.ZIP (266 KB) - PSpice Model
模擬型號

LMR54410F PSpice Transient Model (Rev. A)

SLUM801A.ZIP (267 KB) - PSpice Model
計算工具

SLURB07 LMR54410 Quick Start Tool

支援產品和硬體

支援產品和硬體

產品
AC/DC 和 DC/DC 轉換器 (整合式 FET)
LMR54410 具 80-µA IQ 的 SIMPLE SWITCHER® 電源轉換器 4.5-V 至 36-V、1-A 同步降壓
PCB 佈局

LMR544xx PCB Layout Files

SLURB08.ZIP (2441 KB)
參考設計

PMP23365 — 具備外部熱插拔及遙測功能的 24V、3A 8 類 PoE PD 參考設計

此參考設計利用 24V 與 3A 輸出實作乙太網路供電 (PoE) 電源裝置 (PD) 主動箝位順向式轉換器。配備整合式脈衝寬度調變器 (PWM) 控制器的 TPS23730 PD 可提供所有必要功能,以實現主動箝位順向式轉換器的 PoE PD 與 PWM 控制。此設計使用二次側調節 (SSR) 和光耦合器回饋。增加外部熱插拔以實現 7 類與 8 類 PD 應用。一次側使用 INA237 來監控 DC/DC 輸入電壓和電流,電源資訊則會由 I2C 隔離器或光耦合器架構電路傳送至二次側。
Test report: PDF
參考設計

TIDA-010087 — 100-A 雙相數位控制電池測試器參考設計

此參考設計說明使用 C2000™ 微控制器 (MCU) 和精密 ADC ADS131M08,以精密控制雙向交錯式降壓轉換器功率級電流與電壓的方式。此設計利用 C2000 MCU 的高解析度脈衝寬度調變 (PWM) 產生周邊設備,實現低於 ±20-mA 的電流穩壓錯誤及 ±1-mV 的電壓穩壓錯誤。
Design guide: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
SOT-23 (DBV) 6 Ultra Librarian

訂購與品質

內含資訊:
  • RoHS
  • REACH
  • 產品標記
  • 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
內含資訊:
  • 晶圓廠位置
  • 組裝地點

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