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参数

Vin (Min) (V) 2.95 Vin (Max) (V) 5.5 Vout (Min) (V) 0.8 Vout (Max) (V) 5 Iout (Max) (A) 3 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 460 Switching frequency (Max) (kHz) 1500 Features Enable, Frequency Synchronization, Power Good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Control mode Current Mode Duty cycle (Max) (%) 85 Type Converter Operating temperature range (C) -40 to 125 Rating Catalog open-in-new 查找其它 降压转换器(集成开关)

封装|引脚|尺寸

HTSSOP (PWP) 16 32 mm² 5 x 6.4 open-in-new 查找其它 降压转换器(集成开关)

特性

  • LM20133Q is AEC-Q100 Qualified and Manufactured on an Automotive Grade Flow
  • Input Voltage Range 2.95V to 5.5V
  • Accurate Current Limit Minimizes Inductor Size
  • 97% Peak Efficiency
  • Frequency Synchronization Pin
  • 32 mΩ Integrated FET Switches
  • Starts up into Pre-Biased Loads
  • Output Voltage Tracking
  • Peak Current Mode Control
  • Adjustable Soft-Start with External Capacitor
  • Precision Enable Pin with Hysteresis
  • Integrated OVP, UVLO, Power Good and Thermal Shutdown
  • HTSSOP 16-Pin Exposed Pad Package

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描述

The LM20133 is a full featured synchronous buck regulator capable of delivering up to 3A of continuous output current. The current mode control loop can be compensated to be stable with virtually any type of output capacitor. For most cases, compensating the device only requires two external components, providing maximum flexibility and ease of use. The device is optimized to work over the input voltage range of 2.95V to 5.5V making it suited for a wide variety of low voltage systems.

The device features internal over voltage protection (OVP) and over current protection (OCP) circuits for increased system reliability. A precision enable pin and integrated UVLO allows the turn on of the device to be tightly controlled and sequenced. Start-up inrush currents are limited by both an internally fixed and externally adjustable Soft-Start circuit. Fault detection and supply sequencing is possible with the integrated power good circuit.

The switching frequency of the LM20133 can be synchronized to an external clock by use of the SYNC pin. The SYNC pin is capable of synchronizing to input signals ranging from 500 kHz to 1.5 MHz.

The LM20133 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track a higher voltage rail using the SS/TRK pin. If the output of the LM20133 is pre-biased at startup it will not sink current to pull the output low until the internal soft-start ramp exceeds the voltage at the feedback pin.

The LM20133 is offered in a 16-pin HTSSOP package with an exposed pad that can be soldered to the PCB, eliminating the need for bulky heatsinks.

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技术文档

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类型 标题 下载最新的英文版本 发布
* 数据表 LM20133/LM20133Q 3A, Synchronous Buck Regulator with Input Synchronization 数据表 2013年 3月 27日
技术文章 Minimize the impact of the MLCC shortage on your power application 2019年 3月 29日
选择指南 电源管理指南 2018 (Rev. K) 2018年 7月 31日
用户指南 AN-1688 LM20133 Evaluation Board 2013年 5月 3日
应用手册 AN-1747 3A LM20k Reference Designs 2013年 5月 3日
应用手册 AN-1751 4A LM20k Reference Designs 2013年 5月 3日
应用手册 AN-2077 LM20k POL Module 2013年 5月 3日
应用手册 Powring FPGAs Using LM201xx PowerWise Synchronous Buck Regulators 2007年 10月 29日

设计与开发

有关其他条款或所需资源,请点击下面的任何链接来查看详情页面。

设计工具和仿真

计算工具 下载
LM20133 设计电子表格
LM20133DESIGN-CALC

CAD/CAE 符号

封装 引脚 下载
HTSSOP (PWP) 16 视图选项

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