描述 Description

MIC2185 is a high efficiency synchronous boost PWM control IC. With its wide input voltage range of 2.9V to 14V, the MIC2185 can be used to efficiently boost voltages in 1- or 2-cell Li-Ion battery powered applications, as well as fixed 3.3V and 5V systems. Its powerful 5 Ohm output drivers allow the MIC2185 to supply large output currents with the selection of the proper external MOSFETs.

With it's fixed frequency PWM architecture, and easily synchronized drive, the MIC2185 is ideal for noise-sensitive telecommunications applications. The nominal 400kHz operating frequency of the MIC2185 can be divided by two, allowing the device to be externally synchronized to frequencies below 400kHz.

The MIC2185 also features a low current shutdown mode and a programmable undervoltage lockout. A skipped pulse mode of operation can be manually set to achieve higher efficiencies at light load conditions.

The MIC2185 is available in a 16-pin SOIC package and 16-pin QSOP package with an ambient temperature operating range from -40°C to 85°C.

特性 Features

? Input voltage range: 2.9V to 14V
? 95% efficiency
? Oscillator frequency of 200kHz/400kHz
? Frequency sync to 600kHz
? 0.5μA shutdown current
? Two 5O output drivers
? Front edge blanking
? Input voltage range: 2.9V to 14V
? 95% efficiency
? Oscillator frequency of 200kHz/400kHz
? Frequency sync to 600kHz
? 0.5μA shutdown current
? Two 5O output drivers
? Front edge blanking

簡介

MIC2185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MIC2185DC-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?fù)浣Y(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。