描述 Description

The MIC2169A is a high-efficiency, simple to use 500kHz PWM synchronous buck control IC housed in a small MSOP-10 package. The MIC2169A allows compact DC/DC solutions with a minimal external component count and cost. The MIC2169A operates from a 3V to 14.5V input, without the need of any additional bias voltage. The output voltage can be precisely regulated down to 0.8V. The adaptive all Channel MOSFET drive scheme allows efficiencies over 95% across a wide load range.The MIC2169A senses current across the high-side N-Channel MOSFET, eliminating the need for an expensive and lossy current-sense resistor. Current limit accuracy is maintained by a positive temperature coefficient that tracks the increasing RDS(ON) of the external MOSFET. Further cost and space are saved by the internal in-rush-current limiting digital soft-start.The MIC2169A is available in a 10-pin MSOP package, with a wide junction operating range of -40°C to +125°C.

特性 Features

? 3V to 14.5V input voltage range
? Adjustable output voltage down to 0.8V
? Up to 95% efficiency
? 500kHz PWM operation
? Adjustable current limit senses high-side N-Channel MOSFET current
? No external current-sense resistor
? Adaptive gate drive increases efficiency
? Overvoltage protection protects the load in fault conditions
? Dual mode current limit speeds up recovery time
? \"Hiccup\" mode short-circuit protection
? Internal soft-start
? Dual function COMP and EN pin allows low-power shutdown
? Small size MSOP 10-lead package

簡(jiǎn)介

MIC2169A屬于集成電路（IC）的PMIC-穩(wěn)壓器-DCDC開(kāi)關(guān)式控制器。由制造生產(chǎn)的MIC2169ADC-DC 開(kāi)關(guān)控制器PMIC（電源管理集成電路）DC 到 DC 開(kāi)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。