L4949ED-E中文资料多功能极低压降稳压器数据手册ST规格书

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 power- on reset and input voltage sense. They are

designed for supplying the microcomputer

controlled systems especially in automotive applications.

特性 Features

• AEC-Q100 qualified
• ECOPACK®: lead free and RoHS compliant
• Operating DC supply voltage range 5 V - 28 V
• Transient supply voltage up to 40 V
• Extremely low quiescent current in standby
• High precision standby output voltage 5V±1%
• Output current capability up to 100 mA
• Very low dropout voltage less than 0.5 V
• Reset circuit sensing the output voltage
• Programmable reset pulse delay with external capacitor
• Voltage sense comparator
• Thermal shutdown and short circuit protections

简介

L4949ED-E属于集成电路（IC）的线性+开关稳压器。由制造生产的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。