MIC5259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 MIC5259 is an efficient CMOS voltage regulator optimized for low-noise applications. It offers 1.5% initial accuracy, low dropout voltage (300mV at 300mA), and low ground current (typically 105µA at light load). The MIC5259 provides a very low noise output, ideal for RF applications where a clean voltage source is required. The MIC5259 has a high PSRR even at low supply voltages, critical for battery-operated electronics. A noise bypass pin is also available for further reduction of output noise.Designed specifically for handheld and battery-powered devices, the MIC5259 provides a TTL logic-compatible enable pin. When disabled, power consumption drops to nearly zero. The MIC5259 also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications; a critical issue in handheld wireless devices. Key features include current limit, thermal shutdown, faster transient response, and an active clamp to speed up device turnoff. The MIC5259 is available in Thin SOT-23-5 package in a wide range of output voltages.

特性 Features

• Input voltage range: 2.7V to 6.0V
• PSRR: 70dB at 1kHz
• Low output noise: 30µVrms
• Stability with ceramic output capacitors
• Low dropout: 300mV at 300mA
• 1.5% initial accuracy
• 3.0% over temperature
• Low quiescent current: 105µA
• Tight load and line regulation
• TTL logic-controlled enable input
• Zero off-mode current state
• Thermal shutdown and current limit protection

简介

MIC5259属于集成电路（IC）的线性+开关稳压器。由制造生产的MIC5259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。