L4988中文资料低压降稳压器数据手册ST规格书

描述 Description

The L4988 is a monolithic integrated 5V voltage regulator with a low drop voltage at currents up to 200mA. The output voltage regulating element consists in a p-channel MOS and the regulation is performed regardless of input voltage transients up to 40V. The high precision of the output voltage is obtained with a pre-trimmed reference voltage. The L4988 is protected against short circuit and an over-temperature protection switches off the device in case of extremely high power dissipa-tion. The L4988 is active when the Enable is high. State of the art features like reset and watchdog make this device particularly suitable to supply microprocessor systems in automotive applications.

特性 Features

• AEC-Q100 qualified
• Operating DC supply voltage range 5.6 V to 31 V
• Reset circuit sensing the output voltage down to 1V
• Programmable reset pulse delay with external capacitor
• Watchdog
• Programmable watchdog timer with external capacitor
• Enable input for enabling/disabling the watchdog functionality
• Thermal shutdown and short circuit protection
• Wide temperature range (Tj = -40°C to 150°C)

简介

L4988属于集成电路（IC）的线性+开关稳压器。由制造生产的L4988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。