MIC2777数据手册集成电路（IC）的监控器规格书PDF

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

简介

MIC2777属于集成电路（IC）的监控器。由制造生产的MIC2777监控器PMIC 监控器用于监视和/或控制电路中的电压轨，能够连接微控制器以维持一定的功率限值。监控器类型包括电池备用电路、监控器、多电压监控器、电源监控器、稳压器/监控器、复位计时器、定序器、简单复位/上电复位、智能开/关控制器、系统管理器、电压检测器和看门狗电路。