描述 Description

The SG79xxA/SG79xx series of negative regulators offer self-contained, fixed voltage capability with up to 1.5A of load current and input voltage up to -30V. With a variety of output voltages this regulator series is an optimum complement to the SG7800A/SG7800 positive three terminal regulators. These units feature a unique band gap reference which allows the SG79xxA series to be specified with an output voltage tolerance of ±1.5%. The SG79xxA versions also offer much improved line regulation characteristics. All protective features of thermal shutdown, current limiting, and safe-area control have been designed into these units and since these regulators require only a single output capacitor (SG79xx series) or a capacitor and 5mA minimum load (SG120 series) for satisfactory performance, ease of application is assured. Although designed as fixed-voltage regulators, the output voltage can be increased through the use of a simple voltage divider. The low quiescent drain current of the device insures good regulation when this method is used. These devices are available in hermetically sealed TO-257 (both case grounded ‘G’ and isolated ‘IG’), TO-3, TO-39, and LCC packages.Microchip Ordering Part? Standard Microcircuit Drawing (SMD)?SG7912AG-DESC Cross Reference 5962-8874701TASG7912AG-DESC Cross Reference 5962-8874701TXSG7912AIG-DESC Cross Reference 5962-8874701UASG7912AIG-DESC Cross Reference 5962-8874701UXSG7912AK-DESC Cross Reference 5962-8874701YASG7912AK-DESC Cross Reference 5962-8874701YXSG7912AT-DESC Cross Reference 5962-8874701XASG7912AT-DESC Cross Reference 5962-8874701XX

特性 Features

Output Voltage Set Internally to ±1.5% on SG79xxA
Output Current up to 1.5A
Excellent Line and Load Regulation
Foldback Current Limiting
Thermal Overload Protection
Voltages Available: -5V, -6V, -12V, -15V
Contact Factory for Other Voltage Options
Available in Surface Mount Package

簡(jiǎn)介

SG7912A屬于集成電路（IC）的線性+開關(guān)穩(wěn)壓器。由制造生產(chǎn)的SG7912A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(gè)最小量，并且在工作時(shí)會(huì)將輸入端的任何多余電壓轉(zhuǎn)換為熱量。對(duì)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(duì)噪聲高度敏感的應(yīng)用。