MIC5247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 MIC5247 is an efficient and precise, low-voltage CMOS voltage regulator optimized for ultra-low noise applications. The MIC5247 offers better than 1% initial accuracy and 85mA constant ground current over load (typically 85mA). The MIC5247 provides a very low-noise output, ideal for RF applications where quiet voltage sources are required. A noise bypass pin is also available for further reduction of output noise. Designed specifically for handheld and battery-powered devices, the MIC5247 provides a logic-compatible enable pin. When disabled, power consumption drops nearly to zero. The MIC5247 also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in handheld wireless devices. Key features include current limit, thermal shutdown, a push-pull output for faster transient response, and an active clamp to speed up device turnoff. Available in IttyBitty® SOT-23-5 package, the MIC5247 also offers a range of fixed output voltages.

特性 Features

• Ultra-low noise
• Low voltage outputs
• Load-independent, ultra-low ground current: 85mA
• 150mA output current
• Current limiting
• Thermal shutdown
• Tight load and line regulation
• Zero off-mode current
• Stability with low-ESR capacitors
• Fast transient response
• Logic-controlled enable input

简介

MIC5247属于集成电路（IC）的线性+开关稳压器。由制造生产的MIC5247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。