描述 Description

The TC2054, TC2055, and TC2186 are high accuracy (typically ±0.4%) CMOS upgrades for older (bipolar) low dropout regulators. Designed specifically for battery-operated systems, the devices’ total supply current is typically 55μA at full load (20 to 60 times lower than in bipolar regulators). The devices’ key features include ultra low noise operation, very low dropout voltage - typically 45 mV (TC2054); 90 mV (TC2055); and 140 mV (TC2186) 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). Supply current is reduced to 0.5 μA (max) and both VOUT and ERROR are disabled when the shutdown input is low. The devices also incorporate over-current protection. The TC2054, TC2055, and TC2186 are stable with a low ESR output capacitor of only 1μF and have a maximum output current of 50 mA, 100 mA and 150 mA, respectively. This LDO Family also features a fast response time (60 msec typically) when released from shutdown.

特性 Features

Very Low Supply Current for for Longer Battery Life (55 μA typical)
Very Low Dropout Voltage (90 mV typical @ 100mA)
High Output Voltage Accuracy (±0.4% typical)
Power-Saving Shutdown Mode
ERROR Output Can Be Used as a Low Battery Detector, or Processor Reset Generator
Fast Shutdown Response Time (60 μsec typical)
Over-Current Protection
Space-Saving 5-Pin SOT-23A Package
Pin Compatible Upgrades for Bipolar Regulators

簡介

TC2055屬于集成電路（IC）的線性+開關(guān)穩(wěn)壓器。由制造生產(chǎn)的TC2055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。