MIC94325中文资料500mA LDO with Ripple Blocker Technology数据手册Microchip规格书

描述 Description

The MIC943x5 Ripple Blocker™ is a monolithic integrated circuit that provides low-frequency ripple attenuation (switching noise rejection) to a regulated output voltage. This is important for applications where a DC/DC switching converter is required to lower or raise a battery voltage but where switching noise cannot be tolerated by sensitive downstream circuits such as in RF applications. The MIC943x5 maintains high power supply ripple rejection (PSRR) with input voltages operating near the output voltage level to improve overall system efficiency. A low-voltage logic enable pin facilitates ON/OFF control at typical GPIO voltage levels. The MIC943x5 operates from an input voltage of 1.8V to 3.6V. The MIC943x5 options include fixed (MIC94345/55) or adjustable (MIC94325) output voltages. The MIC94355 version offers an auto-discharge to discharge the output capacitor when the part is disabled.Packaged in a 6-pin 1.6mm x 1.6mm Thin DFN, the MIC943x5 has a junction operating temperature range of -40°C to +125°C.

特性 Features

• 1.8V to 3.6V input voltage range
• Active noise rejection over a wide frequency band: >50dB from 10Hz to 5MHz at 500mA load
•Rated to 500mA output current
• Fixed and adjustable output voltages
• Optional output auto-discharge when disabled
•Current-limit and thermal-limit protected
•1.6mm x 1.6mm, 6-pin Thin DFN
•Logic-controlled enable pin
• -40°C to +125°C junction temperature range

简介

MIC94325属于集成电路（IC）的稳压器-线性。由制造生产的MIC94325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。