描述 Description

The MIC2145 is a small size boost switching regulator that can provide over 2.5W of output power. The input voltage range is between 2.4V to 16V, making the device suitable for one-cell Li-Ion and 3- to 4-cell alkaline/NiCad/NiMH applications. The output voltage of the MIC2145 can be adjusted up to 16V.The MIC2145 is well suited for portable, space-sensitive applications. Its typical 450kHz operation allows small surface mount external components to be used. The MIC2145 has a low quiescent current of 200μA, and a typical shutdown current of 0.5μA. The MIC2145 is capable of high efficiencies in a small board area.The MIC2145 features a low-on resistance internal switch that allows it to provide over 2.5W of output power. The peak switch current can be programmed through an external resistor. This allows the user to set the peak switch current at the level where maximum efficiency occurs. It also allows the user to further optimize for efficiency and inductor size by setting the peak current below the level of inductor saturation.The MIC2145 is available in an MSOP-8 package with an ambient operating temperature range from -40°C to +85°C.

特性 Features

? 2.4V to 16V input voltage
? Output adjustable to 16V
? Programmable peak current limit
? Soft start
? Up to 450kHz switching frequency
? 0.5μA shutdown current
? 200μA quiescent current
? Capable of 5V/500mA output with 3.3V input
? Achieves over 85% efficiency
? Implements low power boost, SEPIC, and flyback topologies
? MSOP-8 package

簡(jiǎn)介

MIC2145屬于集成電路（IC）的穩(wěn)壓器-DC-DC開(kāi)關(guān)穩(wěn)壓器。由制造生產(chǎn)的MIC2145穩(wěn)壓器 - DC-DC 開(kāi)關(guān)穩(wěn)壓器DC-DC 開(kāi)關(guān)穩(wěn)壓器 PMIC（電源管理集成電路）產(chǎn)品族中的產(chǎn)品是元器件級(jí)設(shè)備，用于需要穩(wěn)定 DC 輸入電壓和/或?qū)⑵滢D(zhuǎn)換為不同幅度的輸出電壓的應(yīng)用。這些器件與稱為“控制器”PMIC 的類似產(chǎn)品的區(qū)別在于集成了主開(kāi)關(guān)元件，設(shè)備提供的電力會(huì)通過(guò)該元件。