MIC4950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 MIC4950 is a high-efficiency, 5A synchronous buckregulator with ultra-fast transient response perfectly suitedfor supplying processor core and I/O voltages from a 5V or3.3V bus. The MIC4950 provides a switching frequency upto 3.3MHz while achieving peak efficiencies up to 95%. Anadditional benefit of high-frequency operation is very lowoutput ripple voltage throughout the entire load range withthe use of a small output capacitor. The MIC4950 isdesigned for use with a very small inductor, down to 1μH,and an output ceramic capacitor as small as 10μF withoutthe need for external ripple injection. A wide range ofoutput capacitor types and values can also beaccommodated.The MIC4950 supports safe start-up into a pre-biasedoutput.The MIC4950 is available in 10-pin 3mm x 4mm DFNpackage with an operating junction temperature rangefrom -40°C to +125°C. The MIC4930 is pin-to-pincompatible with the 5A-rated MIC4950YFL.

特性 Features

• Input voltage: 2.7V to 5.5V
• 5A output current
• Up to 95% efficiency
• Up to 3.3MHz operation
• Safe start-up into a pre-biased output
• Power Good output
• Ultra-fast transient response
• Low output voltage ripple
• Low RDS(ON) integrated MOSFET switches
• 0.01µA shutdown current
• Thermal shutdown and current limit protection
• Output voltage as low as 0.7V
• -40°C to +125°C junction temperature range
• 3mm x 4mm DFN-10L

简介

MIC4950属于集成电路（IC）的线性+开关稳压器。由制造生产的MIC4950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。