L4995中文资料低压降稳压器数据手册ST规格书

描述 Description

L4995 is a family of monolithic integrated 5 V voltage regulators with a low drop voltage at currents of up to 500 mA, available in both 12 and 24 pin packages.

The output voltage regulating element consists of a p-channel MOS and regulation is performed regardless of input voltage transients of up to 40V.

The high precision of the output voltage is obtained using a pre-trimmed reference voltage. The L4995 family is protected against short circuit and overtemperature protection switches off the devices in the case of extremely high power dissipation. The L4995 integrates the watchdog, enable and externally programmable reset circuits. The L4995A features the externally programmable reset and enable. Finally the L4995R features the externally programmable reset.

The combination of such features makes this device particularly flexible and 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
• Low dropout voltage
• Low quiescent current consumption
• Reset circuit sensing of output voltage down to 1 V
• Programmable reset pulse delay with external capacitor
• Programmable watchdog timer with external capacitor
• Thermal shutdown and short circuit protection
• Wide temperature range (Tj = -40 °C to 150 °C)
• Enable input for enabling/disabling the voltage regulator

简介

L4995属于集成电路（IC）的线性+开关稳压器。由制造生产的L4995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。