NCV2951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 LP2950 and LP2951 are micropower low dropout (LDO) linear voltage regulators that are specifically designed to maintain proper regulation with an extremely low input-to-output voltage differential. These devices feature a very low quiescent bias current of 75 µA and are capable of supplying output currents in excess of 100 mA. Internal current and thermal limiting protection is provided.The LP2951 LDO linear voltage regulator has three additional features. The first is the Errorbar Output that can be used to signal external circuitry of an out of regulation condition, or as a microprocessor power-on reset. The second feature allows the output voltage to be preset to 5.0 V, 3.3 V or 3.0 V output (depending on the version) or programmed from 1.25 V to 29 V. It consists of a pinned out resistor divider along with direct access to the Error Amplifier feedback input. The third feature is a Shutdown input that allows a logic level signal to turn-off or turn-on the regulator output. Due to the low input-to-output voltage differential and bias current specifications, these devices are ideally suited for battery powered computer, consumer, and industrial equipment where an extension ofuseful battery life is desirable. The LP2950 is available in the three pin case 29 and DPAK packages, and the LP2951 is available in the eight pin dual-in-line, SO-8 and Micro-8 surface mount packages.The 'A' suffix devices feature an initial output voltage tolerance +/-0.5%.

特性 Features

• Low Quiescent Bias Current of 75 mA
• Low Input-to-Output Voltage Differential of 50 mV at 100 mA and 380 mV at 100 mA
• 5.0 V, 3.3 V or 3.0 V +/-0.5% Allows Use as a Regulator or Reference
• Extremely Tight Line and Load Regulation
• Requires Only a 1.0 mF Output Capacitor for Stability
• Internal Current and Thermal Limiting
• LP2951 also has Error(bar) Output Signals an Out of Regulation Condition
• LP2951 also has Output Programmable from 1.25 V to 29 V
• LP2951 also has Logic Level Shutdown Input
• Pb-Free Packages are Available

应用 Application

• Automotive

简介

NCV2951属于集成电路（IC）的线性+开关稳压器。由制造生产的NCV2951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。