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

簡介

L4949ED-E屬于集成電路（IC）的線性+開關(guān)穩(wěn)壓器。由制造生產(chǎn)的L4949ED-E穩(wěn)壓器 - 線性線性穩(wěn)壓器用于提供穩(wěn)定的輸出電壓，無論負載電流、輸入電壓或環(huán)境因素如何變化，這些輸出電壓通常都要保持不變。它們的工作原理要求輸入電壓維持在高于所需的輸出電壓，而且要超出某個最小量，并且在工作時會將輸入端的任何多余電壓轉(zhuǎn)換為熱量。對于大多數(shù)應(yīng)用而言，雖然這種穩(wěn)壓器的效率低于開關(guān)模式的穩(wěn)壓器，但它們通常更適合對噪聲高度敏感的應(yīng)用。