L4949ED-E集成电路（IC）的线性+开关稳压器规格书PDF中文资料

L4949ED-E属于集成电路（IC）的线性+开关稳压器。由意法半导体集团制造生产的L4949ED-E稳压器 - 线性线性稳压器用于提供稳定的输出电压，无论负载电流、输入电压或环境因素如何变化，这些输出电压通常都要保持不变。它们的工作原理要求输入电压维持在高于所需的输出电压，而且要超出某个最小量，并且在工作时会将输入端的任何多余电压转换为热量。对于大多数应用而言，虽然这种稳压器的效率低于开关模式的稳压器，但它们通常更适合对噪声高度敏感的应用。

描述 Description

The L4949ED-E and L4949EP-E are monolithic

integrated 5V voltage regulators with a very low

dropout output and additional functions as poweron reset and input voltage sense. They are

designed for supplying the microcomputer

controlled systems especially in automotive

applications.

特性 Features

■ ECOPACK®: lead free and RoHS compliant

■ Automotive Grade: compliance with AEC

guidelines

■ Operating DC supply voltage range 5 V - 28 V

■ Transient supply voltage up to 40V

■ Extremely low quiescent current in standby

mode

■ High precision standby output voltage 5V±1

■ Output current capability up to 100mA

■ Very low dropout voltage less than 0.5V

■ Reset circuit sensing the output voltage

■ Programmable reset pulse delay with external

capacitor

■ Voltage sense comparator

■ Thermal shutdown and short circuit protections