描述 Description

The NCP1117I series are low dropout (LDO) positive linear voltage regulators that are capable of providing an output current that is in excess of 1.0 A with a maximum dropout voltage of 1.2 V at 800 mA over temperature. This series contains eight fixed output voltages of 1.8 V, 3.3 V?and 5.0 V that have no minimum load requirement to maintain regulation. Also included is an adjustable output version that can be programmed from 1.25 V to 18.8 V with two external resistors. On chip trimming adjusts the reference/output voltage to within +/- 1.0% accuracy. Internal protection features consist of output current limiting, safe operating area compensation, and thermal shutdown. The NCP1117I series can operate with up to 20 V input. Devices are available in SOT223 and DPAK packages.

特性 Features

? Operation to 20 V Input
? Wide input voltage range
? Reference/Output Voltage Trimmed to +/- 1.0%
? Very good precision of output voltage
? Output Current in Excess of 1.0 A
? 1.2 V Maximum Dropout Voltage at 800 mA Over Temperature
? Fixed Output Voltages of 1.8 V, 3.3 V and 5.0 V
? Adjustable Output Voltage Option
? No Minimum Load Requirement for Fixed Voltage Output Devices
? Current Limit, Safe Operating and Thermal Shutdown Protection
? Pb-Free Packages are Available

應(yīng)用 Application

? Consumer and Industrial Equipment Point of Regulation
? Switching Power Supply Post Regulation
? Hard Drive Controllers
? Battery Chargers
? Automotive
? Direct replacement LM1117I

簡(jiǎn)介

NCP1117I屬于集成電路（IC）的線性+開關(guān)穩(wěn)壓器。由制造生產(chǎn)的NCP1117I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。