General Description

The TC57 is a low dropout regulator controller that operates with an external PNP pass transistor, allowing the user to tailor the LDO characteristics to suit the application at hand. This results in lower dropout operation (and often lower cost) compared with traditional linear regulators with on-board pass transistors. The maximum output current of a TC57-based regulator circuit is limited only by the characteristics of the external pass transistor. For example, a maximum output current of 650mA (with a dropout voltage of 100mV) results when an FZT749 pass transistor is used, while a Darlington configuration can deliver up to 4A.

Flexibility, and superior performance make this family of regulator controllers the ideal choice in applications where low dropout voltage and low installed cost are key.

Features

? Low Dropout Voltage: 100mV @ 650mA with

FZT749 PNP Transistor

? 2.7V to 8V Supply Range

? Low Operating Current: 50?A Operating,

0.2?A Shutdown

? Low True Chip Enable

? Output Accuracy < ±2

? Small Package: 5-Pin SOT-23A

Applications

? Battery Operated Systems

? Portable Instruments

? High-Efficiency Linear Regulator

? Post-Regulator for SMPS

? Power Supply or Battery Back-Up Supply for Memory

TC572502屬于集成電路（IC） > 線性穩(wěn)壓器。微芯科技股份有限公司制造生產(chǎn)的TC572502穩(wěn)壓器 - 線性穩(wěn)壓器控制器線性電壓調(diào)節(jié)是指使用與負(fù)載串聯(lián)的旁路元件（通常是雙極型或場效應(yīng)晶體管）以及對應(yīng)的驅(qū)動控制電路，以在負(fù)載兩端產(chǎn)生恒定的標(biāo)稱電壓，負(fù)載通常對電路的電源電壓變化或負(fù)載電流不敏感。該系列中的產(chǎn)品提供與外部旁路元件配合使用所必需的控制功能，從而將其與集成線性穩(wěn)壓器區(qū)分開來，后者將旁路元件與控制電路整合在單個器件封裝中。