LM2931数据手册集成电路（IC）的线性+开关稳压器规格书PDF

描述 Description

The LM2931 series consists of positive fixed and adjustable output low dropout (LDO) linear voltage regulators that are specifically designed to maintain proper regulation with an extremely low input-to-output voltage differential. These devices are capable of supplying output currents in excess of 100 mA and feature a low bias current of 0.4 mA at 10 mA output. Designed primarily to survive in the harsh automotive environment, these devices will protect all external load circuitry from input fault conditions caused by reverse battery connection, two battery jump starts, and excessive line transients during load dump. This series also includes internal current limiting, thermal shutdown, and additionally, is able to withstand temporary power-up with mirror-image insertion. Due to the low dropout voltage and bias current specifications, the LM2931 series is ideally suited for battery powered industrial and consumer equipment where an extension of useful battery life is desirable. The 'C' suffix adjustable output regulators feature an output inhibit pin which is extremely useful in microprocessor-based systems.

特性 Features

• Input-to-Output Voltage Differential of
• Output Current in Excess of 100 mA
• Low Bias Current
• 60 V Load Dump Protection
• -50 V Reverse Transient Protection
• Internal Current Limiting with Thermal Shutdown
• Temporary Mirror-Image Protection
• Ideally Suited for Battery Powered Equipment
• Economical 5-Lead TO-220 Package with Two Optional Leadforms
• Available in Surface Mount SOP-8, D2PAK and DPAK Packages
• High Accuracy (+/-2%) Reference (LM2931AC) Available

应用 Application

• Battery Powered Consumer Products
• Handheld Instruments
• Automotive

简介

LM2931属于集成电路（IC）的线性+开关稳压器。由制造生产的LM2931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。