描述 Description

The MIC2124 is a member of the Hyper Speed Control? family of DC-DC controllers. It uses an adaptive on-time current mode control scheme and operates at a constant frequency.

The MIC2124 operates over a supply range of +3V to +18V, and is independent of the IC supply voltage VIN. It operates at a fixed 300kHz switching frequency and can be used to provide up to 25A of output current. The output voltage is adjustable down to +0.8V.

The MIC2124 includes an EN/COMP pin that can be pulled low to shut down the converter. The MIC2124 optimizes performance and ensures stability with external compensation.

The UVLO is provided to ensure proper operation under power-sag conditions and to make sure that the external power MOSFET has enough voltage to work with. An internal digital soft-start ensures reduced inrush current. Cycle-by-cycle current limiting ensures FET protection.

The MIC2124 is available in a 10-pin MSOP package with a junction temperature operating range from -40°C to +125°C.

特性 Features

? +3V to +18V input voltage
? 25A output current capability
? Any Capacitor? stable
? Zero ESR to high ESR
? Output down to 0.8V with ±1% FB accuracy
? Up to 94% efficiency
? 300kHz switching frequency
? All N-Channel MOSFET design
? Shutdown feature with EN/COMP
? No current-sense resistor needed
? Internal 4ms digital soft-start
? Thermal shutdown
? Pre-bias output safe
? Cycle-by-Cycle foldback current-limit protection
? 10-pin MSOP package
? -40°C to +125°C junction temperature range

簡介

MIC2124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MIC2124DC-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。