NCP1117I数据手册集成电路（IC）的线性+开关稳压器规格书PDF

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

应用 Application

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

简介

NCP1117I属于集成电路（IC）的线性+开关稳压器。由制造生产的NCP1117I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。