MIC5524中文资料Single High-Performance 500mA LDO数据手册Microchip规格书

描述 Description

The MIC5524 is a low-power, μCap, low dropout regulator designed for optimal performance in a very-small footprint. It is capable of sourcing 500mA of output current and only draws 38μA of operating current to do so. The MIC5524 includes an auto-discharge feature on the output that is activated when the enable pin is low and it has an internal pull down resistor on the enable pin that will disable the output when the enable pin is left floating, this is ideal for applications where the control signal is floating during processor boot up.This high-performance LDO offers fast transient response and good PSRR in a 1mm x 1mm Thin (0.4mm high) DFN package.Ideal for battery-operated applications, the MIC5524 offers 2% accuracy, extremely low dropout voltage (260mV @ 500mA), and can regulate output voltages down to 1.0V. Equipped with a TTL logic-compatible enable pin, the MIC5524 can be put into a zero-off-mode current state, drawing no current when disabled.The MIC5524 is a μCap design, operating with very small ceramic output capacitors for stability, reducing required board space and component cost for space-critical applications. The MIC5524 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 down to 1.0V
• 500mA guaranteed output current
• High output initial accuracy (±1%)
• High PSRR: 80dB
• Low quiescent current: 38µA
• Stable with 2.2µF ceramic output capacitors
• Low dropout voltage: 260mV @ 500mA
• Autodischarge and internal enable pulldown
• Thermal-shutdown and current-limit protection
• 4-pin 1mm x 1mm Thin DFN package

简介

MIC5524属于集成电路（IC）的线性+开关稳压器。由制造生产的MIC5524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。