SG7805T中文资料High-Reliability Power Management数据手册Microchip规格书

描述 Description

Key Features: · Output voltage set internally to ± 1.5% on SG7800A · Input voltage range to 50V max. on SG7800A · Two volt input-output differential · Excellent line and load regulation · Foldback current limiting · Thermal overload protection · Voltages available: 5V, 12V, 15V · Available in surface mount package The SG7800A/SG7800 series of positive regulators offer self contained, fixed-voltage capability with up to 1.5A of load current and input voltage up to 50V (SG7800A series only). These units feature a unique on-chip trimming system to set the output voltages to within 1.5% of nominal on the SG7800A series, 2.0% on the SG7800 series. The SG7800A versions also offer much improved line and load regulation characteristics. Utilizing an improved Bandgap reference design, problems have been eliminated that are normally associated with the Zener diode references, such as drift in output voltage and large changes in the line and load regulation. 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 insures good regulation when this method is used. Product is available in hermetically sealed TO-257, TO-3, TO39 and LCC packages.

简介

SG7805T属于集成电路（IC）的线性+开关稳压器。由制造生产的SG7805T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。