描述 Description

The MIC2777 is a dual power supply supervisor that provides under-voltage monitoring, manual reset capability, and poweron reset generation in a compact 5-pin SOT package. Features include two under-voltage detectors, one fixed and one adjustable, and both active-high and active-low reset outputs.One under-voltage detector compares VDD against a fixed threshold. Ten factory-programmed thresholds are available.The other under-voltage detector is user-adjustable.The reset outputs are asserted for no less than 140ms at power-on and any time VDD or the input voltage drops below the corresponding reference voltage. They remain asserted for the timeout period after the input voltage and VDD subsequently rise back above the threshold boundaries. A reset can be generated at any time by pulling down on the adjustable input. Hysteresis is included to prevent chattering due to noise. Typical supply current is a low 3.5μA.

特性 Features

? Monitors two independent power supplies for under-voltage conditions
? One fixed and one user adjustable input
? 1.5% theshold accuracy
? Choice of factory-programmed thresholds
? User-adjustable input can monitor supplies as low as 0.3V
? Generates 140ms (minimum) power-on RESET pulse
? Manual reset capability
? Both active-high and active-low RESET outputs
? Input may be pulled above VDD(abs. max.)
? /RST output valid down to 1.2V
? Ultra-low supply current, 3.5μA typical
? Rejects brief input transients
? IttyBitty??5-pin SOT-23 package

簡介

MIC2777屬于集成電路（IC）的監(jiān)控器。由制造生產(chǎn)的MIC2777監(jiān)控器PMIC 監(jiān)控器用于監(jiān)視和/或控制電路中的電壓軌，能夠連接微控制器以維持一定的功率限值。監(jiān)控器類型包括電池備用電路、監(jiān)控器、多電壓監(jiān)控器、電源監(jiān)控器、穩(wěn)壓器/監(jiān)控器、復(fù)位計(jì)時(shí)器、定序器、簡單復(fù)位/上電復(fù)位、智能開/關(guān)控制器、系統(tǒng)管理器、電壓檢測器和看門狗電路。