描述 Description

The TC1072 and TC1073 are high accuracy (typically ±0.5%) CMOS upgrade for older (bipolar) low dropout regulators. Designed specifically for battery-operated systems, the devices’ CMOS construction eliminates wasted ground current, significantly extending battery life. Total supply current is typically 50μA at full load (20 to 60 times lower than in bipolar regulators). The devices’ key features include ultra low noise operation (plus optional Bypass input); very low dropout voltage (typically 85 mV,TC1072 and 180 mV,TC1073 at full load) and fast response to step changes in load. An error output (ERROR) is asserted when the devices are out-of-regulation (due to a low input voltage or excessive output current). ERROR can be used as a low battery warning or as a processor RESET signal (with the addition of an external RC network). Supply current is reduced to 0.5 μA (max), and both VOUT and ERROR are disabled when the shutdown input is low. The devices incorporate both over-temperature and over-current protection. The TC1072 and TC1073 are stable with an output capacitor of only 1 μF and have a maximum output current of 50 mA. For higher output current versions, please see the TC1185, TC1186, TC1187 (IOUT = 150 mA) and TC1107, TC1108 and TC1173 (IOUT = 300 mA) data sheets.

特性 Features

Very Low Ground Current for Longer Battery Life!
Very Low Dropout Voltage
Choice of 50 mA and 100 mA Output (TC1072, TC1073, Respectively)
High Output Voltage Accuracy
Standard or Custom Output Voltages
Power-Saving Shutdown Mode
ERROR Ouput can be Used as a Low Battery
Detector, or Processor Reset Generator
Bypass Input for Ultra-Quiet Operation
Over-Current and Over-Temperature Protection
Pin Compatible Upgrades for Bipolar Regulators

簡介

TC1073屬于集成電路（IC）的線性+開關(guān)穩(wěn)壓器。由制造生產(chǎn)的TC1073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。