SG7905中文资料Negative Fixed Linear Voltage Regulators - 5, 5.2, 8, 12, 15, 18, 20, 24VFixed数据手册Microchip规格书

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) SG7905K-JAN Cross Reference M38510/11505BYASG7905K-JAN Cross Reference M38510/11505BYXSG7905T-JAN Cross Reference M38510/11501BXASG7905T-JAN Cross Reference M38510/11501BXX

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

简介

SG7905属于集成电路（IC）的线性+开关稳压器。由制造生产的SG7905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。