MIC5502中文资料General Purpose Single 300mA LDO with auto discharge数据手册Microchip规格书

描述 Description

The MIC5501/2/3/4 is an advanced general-purpose LDO ideal for powering general-purpose portable devices. The MIC5501/2/3/4 family of products provides a high-performance 300mA LDO in an ultra-small 1mm x 1mm package. The MIC5502 and MIC5504 LDOs include an auto-discharge feature on the output that is activated when the enable pin is low. The MIC5503 and MIC5504 have an internal pull-down resistor on the enable pin that disables the output when the enable pin is left floating. This is ideal for applications where the control signal is floating during processor boot up.Ideal for battery-powered applications, the MIC5501/2/3/4 offers 2% initial accuracy, low dropout voltage (160mV at 300mA), and low ground current (typically 38µA). The MIC5501/2/3/4 can also be put into a zero-off-mode current state, drawing virtually no current when disabled.The MIC5501/2/3/4 has an operating junction temperature range of -40°C to 125°C.

特性 Features

• Input voltage range: 2.5V to 5.5V
• Fixed output voltages from 1.0V to 3.3V
• 300mA guaranteed output current
• High output accuracy (±2%)
• Low quiescent current: 38µA
• Stable with 1µF ceramic output capacitors
• Low dropout voltage: 160mV @ 300mA
• Output discharge circuit: MIC5502, MIC5504
• Internal enable pull-down: MIC5503, MIC5504
• Thermal-shutdown and current-limit protection
• 4-lead 1.0mm x 1.0mm Thin DFN package
• MIC5504 5-pin SOT23 package

简介

MIC5502属于集成电路（IC）的线性+开关稳压器。由制造生产的MIC5502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。