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AC/DC 和 DC/DC 轉換器 (整合式 FET)

LMR14050

現行

具 40-μA IQ 的 SIMPLE SWITCHER® 40-V、5-A、2.2-MHz 降壓轉換器

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產品規格表

現在提供此產品的更新版本

open-in-new 比較替代產品
功能相同，但引腳輸出與所比較的裝置不同
LMR51450 現行 36-V、5-A 同步降壓轉換器 Smaller solution size, higher efficiency and lower EMI.

LMR14050

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Buck Iout (max) (A) 5 Vin (max) (V) 40 Vin (min) (V) 4 Vout (max) (V) 36 Vout (min) (V) 1 Features Enable, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Tracking, UVLO adjustable Control mode current mode Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2500 Operating temperature range (°C) -40 to 125 Iq (typ) (µA) 40 Duty cycle (max) (%) 98 Type Converter
Rating Catalog Topology Buck Iout (max) (A) 5 Vin (max) (V) 40 Vin (min) (V) 4 Vout (max) (V) 36 Vout (min) (V) 1 Features Enable, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Tracking, UVLO adjustable Control mode current mode Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2500 Operating temperature range (°C) -40 to 125 Iq (typ) (µA) 40 Duty cycle (max) (%) 98 Type Converter
HSOIC (DDA) 8 29.4 mm² 4.9 x 6
  • 4V to 40V input range
  • 5A continuous output current
  • Ultra-low 40µA operating quiescent current
  • 90mΩ high-side MOSFET
  • 75ns minimum switch-on time
  • Current mode control
  • Adjustable switching frequency from 200kHz to 2.5MHz
  • Frequency synchronization to external clock
  • Internal compensation for ease of use
  • High duty cycle operation supported
  • Precision enable input
  • 1µA shutdown current
  • External soft start
  • Thermal, overvoltage, and short protection
  • 8-pin HSOIC with PowerPAD™ package
  • 4V to 40V input range
  • 5A continuous output current
  • Ultra-low 40µA operating quiescent current
  • 90mΩ high-side MOSFET
  • 75ns minimum switch-on time
  • Current mode control
  • Adjustable switching frequency from 200kHz to 2.5MHz
  • Frequency synchronization to external clock
  • Internal compensation for ease of use
  • High duty cycle operation supported
  • Precision enable input
  • 1µA shutdown current
  • External soft start
  • Thermal, overvoltage, and short protection
  • 8-pin HSOIC with PowerPAD™ package

The LMR14050 is a 40V, 5A, step-down regulator with an integrated high-side MOSFET. With a wide input range from 4V to 40V, the device is designed for various applications from industrial to automotive for power conditioning from unregulated sources. The regulator quiescent current is 40µA in sleep mode, which is designed for battery powered systems. An ultra-low 1µA current in shutdown mode can further prolong battery life. A wide adjustable switching frequency range allows either efficiency or external component size to be optimized. Internal loop compensation means that the user is free from the tedious task of loop compensation design. Internal loop compensation also minimizes the external components of the device. A precision enable input allows simplification of regulator control and system power sequencing. The device also has built-in protection features such as cycle-by-cycle current limit, thermal sensing and shutdown due to excessive power dissipation, and output overvoltage protection.

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The LMR14050 is a 40V, 5A, step-down regulator with an integrated high-side MOSFET. With a wide input range from 4V to 40V, the device is designed for various applications from industrial to automotive for power conditioning from unregulated sources. The regulator quiescent current is 40µA in sleep mode, which is designed for battery powered systems. An ultra-low 1µA current in shutdown mode can further prolong battery life. A wide adjustable switching frequency range allows either efficiency or external component size to be optimized. Internal loop compensation means that the user is free from the tedious task of loop compensation design. Internal loop compensation also minimizes the external components of the device. A precision enable input allows simplification of regulator control and system power sequencing. The device also has built-in protection features such as cycle-by-cycle current limit, thermal sensing and shutdown due to excessive power dissipation, and output overvoltage protection.

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類型 標題 日期
* Data sheet LMR14050 SIMPLE SWITCHER® Power Converter 40V, 5A, 2.2MHz Step-Down Converter With 40µA IQ datasheet (Rev. B) PDF | HTML 2024年 12月 20日
Application note Simple Solution for EMI Filter Stability Issue in DC/DC Converters (Rev. A) 2019年 4月 25日
Application note How to Evaluate Junction Temperature Properly with Thermal Metrics (Rev. B) 2019年 3月 29日
Application note How SYNC Logic Affects EMI Performance for Dual-Channel Buck Converters 2018年 4月 27日
Technical article There are more ways than you think to reduce conducted EMI PDF | HTML 2018年 4月 17日
Application note Design Feedforward Capacitor for LMR14020 2017年 12月 20日
Application note How to Evaluate the Maximum Inductor in Internal Compensation PCM Buck Converter 2017年 9月 20日
Application note Extending Buck Regulator to Positive Buck-Boost Configuration 2017年 9月 2日
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 2013年 4月 24日
Application note AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 2013年 4月 23日
Application note AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 2013年 4月 23日
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 2005年 7月 12日
Application note AN-643 EMI/RFI Board Design (Rev. B) 2004年 5月 3日

設計與開發

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開發板

LMR14050SEVM — LMR14050S 降壓式轉換器評估模組

The LMR14050SEVM is a fully assembled and tested circuit for evaluating the LMR14050S Step-Down Converter. The LMR14050SEVM operates from 7V to 36V input (12V nominal) and provides a 5.0V or 3.3V output at 5A. The board also has jumper connectors to enable or disable the converter operation, change (...)

使用指南: PDF
TI.com 無法提供
模擬型號

LMR14050S PSPICE Transient Model

SNVM708.ZIP (62 KB) - PSpice Model
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模擬型號

LMR14050S Unencrypted PSpice Transient Model

SNVM923.ZIP (6 KB) - PSpice Model
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參考設計

TIDA-01458 — 用於超音波 CW 脈衝產生器的低雜訊固定降壓 ±2.5 至 ±12V 輸出電壓 3A 電源參考設計

此參考設計允許數位可編程電源供應器從 24V 匯流排為連續波 (CW) 模式的超音波發射電路供電，在使用者軟體控制下，共有兩個可調整輸出，範圍從 ±2.5 至 ±12V。這些輸出可在正負穩壓器輸出上提供高達 2A 的超低漣波與雜訊。此電源供應器可透過並聯增加更多穩壓器，針對高達 3A 的高輸出電流進行擴充。電源供應器也可與外部時鐘同步。
Design guide: PDF
電路圖: PDF
參考設計

PMP10680 — 4.5V 至 24V 廣泛輸入、負 5V/2A 輸出非同步轉換器參考設計

The PMP10680 reference design is a non-sync buck converter with buck-boost configuration. The PMP10680 accepts an input voltage of 4.5 to 24Vin and provides a negative 5V output capable of supplying continuous 2A of current to the load. With negative output and the self-positive input, (...)
Test report: PDF
電路圖: PDF
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HSOIC (DDA) 8 Ultra Librarian
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