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AC/DC 和 DC/DC 轉換器 (整合式 FET)

LMR24220

現行

42Vin，2.0A 降壓電壓穩壓器，以 micro SMD 提供

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產品規格表

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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
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 Smaller footprint in SOT-23 package, integrated compensation and synchronous rectification.

LMR24220

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Operating temperature range (°C) -20 to 125 Topology Buck Type Converter Iout (max) (A) 2 Vin (min) (V) 4.5 Vin (max) (V) 42 Switching frequency (min) (kHz) 100 Switching frequency (max) (kHz) 1000 Features Enable, Over Current Protection, Synchronous Rectification Control mode COT with emulated ripple Vout (min) (V) 0.8 Vout (max) (V) 24 Iq (typ) (µA) 700 Duty cycle (max) (%) 94
Rating Catalog Operating temperature range (°C) -20 to 125 Topology Buck Type Converter Iout (max) (A) 2 Vin (min) (V) 4.5 Vin (max) (V) 42 Switching frequency (min) (kHz) 100 Switching frequency (max) (kHz) 1000 Features Enable, Over Current Protection, Synchronous Rectification Control mode COT with emulated ripple Vout (min) (V) 0.8 Vout (max) (V) 24 Iq (typ) (µA) 700 Duty cycle (max) (%) 94
DSBGA (YPA) 28 0.5625 mm² 0.75 x 0.75
  • Input Voltage Range of 4.5 V to 42 V
  • Output Voltage Range of 0.8 V to 24 V
  • Output Current up to 2 A
  • Integrated Low RDS(ON) Synchronous MOSFETs for High Efficiency
  • Up to 1-MHz Switching Frequency
  • Low Shutdown IQ, 25 µA Typical
  • Programmable Soft Start
  • No Loop Compensation Required
  • COT Architecture with ERM
  • Tiny Overall Solution Reduces System Cost
  • Integrated Synchronous MOSFETs Provides High Efficiency at Low Output Voltages
  • COT with ERM Architecture
  • Stable with Low ESR Capacitors
  • 28-Bump DSBGA (3.676 × 2.48 × 0.60 mm maximum) Packaging
  • Create a custom design using the LMR24220 with the WEBENCH® Power Designer
  • Input Voltage Range of 4.5 V to 42 V
  • Output Voltage Range of 0.8 V to 24 V
  • Output Current up to 2 A
  • Integrated Low RDS(ON) Synchronous MOSFETs for High Efficiency
  • Up to 1-MHz Switching Frequency
  • Low Shutdown IQ, 25 µA Typical
  • Programmable Soft Start
  • No Loop Compensation Required
  • COT Architecture with ERM
  • Tiny Overall Solution Reduces System Cost
  • Integrated Synchronous MOSFETs Provides High Efficiency at Low Output Voltages
  • COT with ERM Architecture
  • Stable with Low ESR Capacitors
  • 28-Bump DSBGA (3.676 × 2.48 × 0.60 mm maximum) Packaging
  • Create a custom design using the LMR24220 with the WEBENCH® Power Designer

The LMR24220 synchronously rectified buck converter features all required functions to implement a highly efficient and cost effective buck regulator. It is capable of supplying 2-A to loads with an output voltage as low as 0.8 V. Dual N-channel synchronous MOSFET switches allow a low component count, thus reducing complexity and minimizing board size.

Different from most other COT regulators, the LMR24220 does not rely on output capacitor ESR for stability. The device is designed to work exceptionally well with ceramic and other very low ESR output capacitors. It requires no loop compensation, results in a fast load-transient response and simple circuit implementation. The operating frequency remains nearly constant with line variations due to the inverse relationship between the input voltage and the on-time. The operating frequency can be externally programmed up to 1 MHz. Protection features include VCC undervoltage lockout, output overvoltage protection, thermal shutdown, and gate drive undervoltage lockout. The LMR24220 is available in the small DSBGA low profile chip-scale package.

The LMR24220 synchronously rectified buck converter features all required functions to implement a highly efficient and cost effective buck regulator. It is capable of supplying 2-A to loads with an output voltage as low as 0.8 V. Dual N-channel synchronous MOSFET switches allow a low component count, thus reducing complexity and minimizing board size.

Different from most other COT regulators, the LMR24220 does not rely on output capacitor ESR for stability. The device is designed to work exceptionally well with ceramic and other very low ESR output capacitors. It requires no loop compensation, results in a fast load-transient response and simple circuit implementation. The operating frequency remains nearly constant with line variations due to the inverse relationship between the input voltage and the on-time. The operating frequency can be externally programmed up to 1 MHz. Protection features include VCC undervoltage lockout, output overvoltage protection, thermal shutdown, and gate drive undervoltage lockout. The LMR24220 is available in the small DSBGA low profile chip-scale package.

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類型 標題 日期
* Data sheet LMR24220 42-VIN, 2-A Step-Down Voltage Regulator in DSBGA Package datasheet (Rev. F) PDF | HTML 2019年 6月 17日
Application note Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 2024年 3月 25日
Selection guide Power Management Guide 2018 (Rev. R) 2018年 6月 25日
Application note Absolute Maximum Ratings for Soldering (Rev. D) 2016年 6月 9日
Application note Cap Drop Offline Supply for E-Meters 2015年 6月 16日
Application note Inverting Applications Made SIMPLE With LM4600x and LM4360x (Rev. B) 2015年 2月 20日
Application note Thermal Design Made Simple With LM43603 and LM46002 2014年 9月 15日
Application note Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 2014年 9月 12日
Application note Compensation Made SIMPLE With LM4360x, LM4600x 2014年 7月 29日
Application note Automotive Line Transient Protection Circuit 2014年 7月 1日
User guide AN-2170 LMR24210/20 Evaluation Board (Rev. A) 2013年 4月 26日
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 2013年 4月 24日
User guide AN-2193 LMR24220 Multi-Rail Reference Board (Rev. A) 2013年 4月 24日
Application note AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 2013年 4月 23日
Application note AN-1197 Selecting Inductors for Buck Converters (Rev. B) 2013年 4月 23日
Application note AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 2013年 4月 23日
Application note AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 2013年 4月 23日
Application note AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 2013年 4月 23日
Application note AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 2013年 4月 23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
Application note Input and Output Capacitor Selection 2005年 9月 19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

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開發板

LMR24220EVAL — LMR24220 小體積 42V 降壓穩壓器 2A 評估板

The LMR24210/20 Step Down Switching Regulator features all required functions to implement a cost effective, efficient buck power converter capable of supplying up to 1.0A or 2.0A. The Constant On-Time (COT) regulation scheme requires no loop compensation, results in a fast load transient response (...)

使用指南: PDF
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開發板

LMR24220RB — LMR24220 5W 多軌電源參考基板

The LMR24220 Multi-Rail reference board implements an extremely compact solution. It is designed to convert from 12V or 24V rails down to typical point-of-load voltages of 3.3V, 1.8V and 1.2V. This design utilizes an LMR24220 Nano Regulator and two LMZ10501 Nano Modules to demonstrate a complete (...)

使用指南: PDF
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模擬型號

LMR24220 PSpice Transient Model

SNVM217.ZIP (204 KB) - PSpice Model
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模擬型號

LMR24220 Unencrypted PSpice Transient Model

SNVM946.ZIP (3 KB) - PSpice Model
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