描述 Description

The MIC2127A is a constant-frequency synchronous buck controllers featuring a unique adaptive ON-time control architecture. The MIC2127A operates over an input voltage range from 4.5V to 75V and can be used to supply load current up to 25A (Thermally Limited)?. The output voltage is adjustable down to 0.6V with a guaranteed accuracy of ±1%. The device operates with programmable switching frequency from 200kHz to 800kHz.

The MIC2127A offers a full suite of protection features to ensure protection of the IC during fault conditions. These include undervoltage lockout to ensure proper operation under power-sag conditions,?Internal Soft Start, \"hiccup\" mode short-circuit protection, and thermal shutdown.

特性 Features

? Hyper Speed Control? architecture enables:
? 4.5V to 75V input voltage
? Adjustable output voltage from 0.6V to 30V
? 200kHz to 800kHz programmable switching frequency
? Internal?soft start
? Enable input and power good output
? Built-in 5V regulator for single-supply operation
? Programmable current limit and \"hiccup\" mode short-circuit protection
? Mode pin for selecting CCM and DCM operation
? Internal compensation, and thermal shutdown
? Supports safe start-up into a pre-biased output
? -40°C to +125°C junction temperature range
? Available in 16-pin 3mm x 3mm QFN package

簡介

MIC2127A屬于集成電路（IC）的PMIC-穩(wěn)壓器-DCDC開關(guān)式控制器。由制造生產(chǎn)的MIC2127ADC-DC 開關(guān)控制器PMIC（電源管理集成電路）DC 到 DC 開關(guān)式控制器是用于高效率電路的穩(wěn)壓 IC，其配置為生成高于（突升或步升）或低于（突降或步降）輸入電源的輸出電源電壓。其他拓撲結(jié)構(gòu)可能包括：降壓-升壓、反激、正激、Cuk、SEPIC、全橋、半橋和推挽式。這些器件不同于需要最小電壓并“燒盡”多余電壓的線性穩(wěn)壓器。