描述 Description

The LM317M is an adjustable three-terminal positive linear voltage regulator capable of supplying in excess of 500 mA over an output voltage range of 1.2 V to 37 V. This linear voltage regulator is exceptionally easy to use and requires only two external resistors to set the output voltage. Further, it employs internal current limiting, thermal shutdown and safe area compensation, making it essentially blow-out proof. The LM317M serves a wide variety of applications including local, on-card regulation. This linear voltage regulator also makes an especially simple adjustable switching regulator, a programmable output regulator, or by connecting a fixed resistor between the adjustment and output, the LM317M can be used as a precision current regulator.

特性 Features

? Output Current in Excess of 500 mA
? Output Adjustable between 1.2 V and 37 V
? Internal Thermal Overload Protection
? Internal Short Circuit Current Limiting
? Output Transistor Safe-Area Compensation
? Floating Operation for High Voltage Applications
? Eliminates Stocking Many Fixed Voltages
? Pb-Free Packages are Available
? NCV Prefix for Automotive and Other Applications Requiring Site Control Changes

簡介

LM317M屬于集成電路（IC）的線性+開關(guān)穩(wěn)壓器。由制造生產(chǎn)的LM317M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(fù)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。