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LM2736

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具有高效轻负载效率的 3V 到 18V 输入、0.75A 降压转换器

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产品详情

Vin (min) (V) 3 Vin (max) (V) 18 Vout (min) (V) 1.25 Vout (max) (V) 16 Iout (max) (A) 0.75 Iq (typ) (mA) 1.5 Switching frequency (min) (kHz) 400 Switching frequency (max) (kHz) 1900 Features Enable, Light Load Efficiency, Pre-Bias Start-Up Operating temperature range (°C) -40 to 125 Rating Catalog Regulated outputs (#) 1 Control mode current mode Duty cycle (max) (%) 96 Type Converter
Vin (min) (V) 3 Vin (max) (V) 18 Vout (min) (V) 1.25 Vout (max) (V) 16 Iout (max) (A) 0.75 Iq (typ) (mA) 1.5 Switching frequency (min) (kHz) 400 Switching frequency (max) (kHz) 1900 Features Enable, Light Load Efficiency, Pre-Bias Start-Up Operating temperature range (°C) -40 to 125 Rating Catalog Regulated outputs (#) 1 Control mode current mode Duty cycle (max) (%) 96 Type Converter
SOT-23-THN (DDC) 6 8.12 mm² 2.9 x 2.8
  • Thin SOT-6 Package
  • 3.0 V to 18 V Input Voltage Range
  • 1.25 V to 16 V Output Voltage Range
  • 750 mA Output Current
  • 550 kHz (LM2736Y) and 1.6 MHz (LM2736X) Switching Frequencies
  • 350 mΩ NMOS Switch
  • 30 nA Shutdown Current
  • 1.25 V, 2% Internal Voltage Reference
  • Internal Soft-Start
  • Current-Mode, PWM Operation
  • WEBENCH Online Design Tool
  • Thermal Shutdown
  • Thin SOT-6 Package
  • 3.0 V to 18 V Input Voltage Range
  • 1.25 V to 16 V Output Voltage Range
  • 750 mA Output Current
  • 550 kHz (LM2736Y) and 1.6 MHz (LM2736X) Switching Frequencies
  • 350 mΩ NMOS Switch
  • 30 nA Shutdown Current
  • 1.25 V, 2% Internal Voltage Reference
  • Internal Soft-Start
  • Current-Mode, PWM Operation
  • WEBENCH Online Design Tool
  • Thermal Shutdown

The LM2736 regulator is a monolithic, high frequency, PWM step-down DC/DC converter in a 6-pin Thin SOT package. It provides all the active functions to provide local DC/DC conversion with fast transient response and accurate regulation in the smallest possible PCB area.

With a minimum of external components and online design support through WEBENCH, the LM2736 is easy to use. The ability to drive 750 mA loads with an internal 350 mΩ NMOS switch using state-of-the-art 0.5 µm BiCMOS technology results in the best power density available. The world class control circuitry allows for on-times as low as 13 ns, thus supporting exceptionally high frequency conversion over the entire 3 V to 18 V input operating range down to the minimum output voltage of 1.25 V. Switching frequency is internally set to 550 kHz (LM2736Y) or 1.6 MHz (LM2736X), allowing the use of extremely small surface mount inductors and chip capacitors. Even though the operating frequencies are very high, efficiencies up to 90% are easy to achieve. External shutdown is included, featuring an ultra-low stand-by current of 30 nA. The LM2736 utilizes current-mode control and internal compensation to provide high-performance regulation over a wide range of operating conditions. Additional features include internal soft-start circuitry to reduce inrush current, pulse-by-pulse current limit, thermal shutdown, and output over-voltage protection.

For all available packages, see the orderable addendum at the end of the datasheet.

The LM2736 regulator is a monolithic, high frequency, PWM step-down DC/DC converter in a 6-pin Thin SOT package. It provides all the active functions to provide local DC/DC conversion with fast transient response and accurate regulation in the smallest possible PCB area.

With a minimum of external components and online design support through WEBENCH, the LM2736 is easy to use. The ability to drive 750 mA loads with an internal 350 mΩ NMOS switch using state-of-the-art 0.5 µm BiCMOS technology results in the best power density available. The world class control circuitry allows for on-times as low as 13 ns, thus supporting exceptionally high frequency conversion over the entire 3 V to 18 V input operating range down to the minimum output voltage of 1.25 V. Switching frequency is internally set to 550 kHz (LM2736Y) or 1.6 MHz (LM2736X), allowing the use of extremely small surface mount inductors and chip capacitors. Even though the operating frequencies are very high, efficiencies up to 90% are easy to achieve. External shutdown is included, featuring an ultra-low stand-by current of 30 nA. The LM2736 utilizes current-mode control and internal compensation to provide high-performance regulation over a wide range of operating conditions. Additional features include internal soft-start circuitry to reduce inrush current, pulse-by-pulse current limit, thermal shutdown, and output over-voltage protection.

For all available packages, see the orderable addendum at the end of the datasheet.

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技术文档

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类型 标题 下载最新的英语版本 日期
* 数据表 LM2736 Thin SOT 750 mA Load Step-Down DC-DC Regulator 数据表 (Rev. H) PDF | HTML 2014年 12月 29日
应用手册 Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 2024年 3月 25日
用户指南 LM2736 Step-Down Converter Evaluation Module User's Guide (Rev. B) PDF | HTML 2021年 12月 17日
选择指南 Buck Converter Quick Reference Guide (Rev. B) 2021年 4月 8日
应用手册 AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 2013年 4月 24日
应用手册 AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 2013年 4月 23日
应用手册 AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 2013年 4月 23日
应用手册 AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 2013年 4月 23日
应用手册 AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 2013年 4月 23日
应用手册 AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 2013年 4月 23日
应用手册 AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 2013年 4月 23日
用户指南 Dual Output Isolated Flyback Design:User Guide 2012年 1月 27日
应用手册 Power Management Considerations for FPGAs and ASICs 2007年 3月 22日
应用手册 Application Note 1418 LM2736 Evaluation Board (cn) 最新英语版本 (Rev.B) PDF | HTML 2005年 10月 26日
应用手册 Input and Output Capacitor Selection 2005年 9月 19日
更多文献资料 SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 2005年 7月 12日
应用手册 AN-643 EMI/RFI Board Design (Rev. B) 2004年 5月 3日

设计和开发

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CAD/CAE 符号

Dual Output Isolated Flyback Design CAD File

SNVC008.PDF (65 KB)
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SOT-23-THN (DDC) 6 查看选项

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包含信息:
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息:
  • 制造厂地点
  • 封装厂地点

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