描述 Description

The MIC2776 is a power supply supervisor which provides under-voltage monitoring and power-on reset generation in a compact 5-pin SOT package. Features include an adjustable under-voltage detector, a delay-generator, a manual reset input, and a choice of active-high, active-low, or open-drain active-low reset output. The user-adjustable monitoring input is compared against a 300mV reference. This low reference voltage allows monitoring voltages lower than those supported by previous supervisor ICs.The reset output is asserted for no less than 140ms at poweron and any time the input voltage drops below the reference voltage. It remains asserted for the timeout period after the input voltage subsequently rises back above the threshold boundary. A reset can be generated at any time by asserting the manual reset input, /MR. The reset output will remain active at least 140ms after the release of /MR. The /MR input can also be used to daisy-chain the MIC2776 onto existing power monitoring circuitry or other supervisors. Hysteresis is included to prevent chattering due to noise. Typical supply current is a low 3.0μA.

特性 Features

? User-adjustable input can monitor supplies as low as 0.3V
? ±1.5% threshold accuracy
? Separate VDD input
? Generates power-on reset pulse (140ms min.)
? Manual reset input
? Choice of active-low, open-drain or active high or active low complementary outputs
? Inputs can be pulled above VDD (7V abs. max.)
? Open-drain output can be pulled above VDD (7V abs. max.)
? Ultra-low supply current, 3.0μA typical
? Rejects brief input transients
? IttyBitty? SOT-23-5 package

簡介

MIC2776屬于集成電路（IC）的監(jiān)控器。由制造生產(chǎn)的MIC2776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)位計時器、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。