SG7820A中文资料Positive Fixed Linear Voltage Regulators : 5, 6, 8, 12, 15, 18, 20, 24V Fixed数据手册Microchip规格书

描述 Description

The SG78xxA/SG78xx series of positive regulators offer self-contained, fixed-voltage capability with up to 1.5 A of load current and input voltage up to 50 V (SG78xxA series only). These units feature a unique on-chip trimming system to set the output voltages to within ±1.5% of nominal on the SG78xxA series with ±2.0% on the SG78xx series. The SG78xxA versions also offer much improved line and load regulation characteristics. Utilizing an improved bandgap reference design, problems such as drift in output voltage and large changes in the line and load regulation, that are normally associated with the Zener diode references have been eliminated. 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 small output capacitor 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 ensures good regulation when this method is used. Product is available in hermetically sealed TO-257 (both case grounded ‘G’ and isolated ‘IG’), TO-3, TO-39 and leadless chip carrier (LCC) packages.

特性 Features

Output Voltage Set Internally to ±1.5% on SG78xxA
Input Voltage Range to 50 V max on SG78xxA
2 V Input-Output Differential
Excellent Line and Load Regulation
Fold back Current Limiting
Thermal Overload Protection
Voltages Available: 5 V, 12 V, 15 V
Contact Factory for Other Voltage Options
Available in Surface Mount Package

简介

SG7820A属于集成电路（IC）的线性+开关稳压器。由制造生产的SG7820A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。