L9777中文资料低功耗稳压器数据手册ST规格书

描述 Description

The L9777 is a monolithic integrated low drop regulator which can supply up to 200 mA, available in the PowerSSO-12 package.

It is designed to supply microprocessor systems under severe conditions of automotive applications and therefore equipped with additional protection functions against over load, short circuit and over temperature.

Of course the L9777 can also be used in other applications where a regulated voltage is required.

特性 Features

• Operating DC supply voltage range 5.6 V to 31 V
• Low current consumption (110 μA typ @ Iout= 0)
• High precision output voltage (2 %)
• Low dropout voltage
• VDD tracking regulator switchable on/off by VDD_EN pin
• Reset circuit sensing the output voltage down to 1 V.
• Double reset function
• Adjustable reset threshold
• External capacitor to set NMI/ reset power up delay and watchdog frequency
• Over temperature protection
• Wide temperature range (TJ= -40 °C to 150 °C)
• Short circuit proof
• Suitable for use in automotive electronics

简介

L9777属于集成电路（IC）的线性+开关稳压器。由制造生产的L9777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。