General Description

The MIC2774 is a dual power supply supervisor that

provides undervoltage monitoring, manual reset

capability, and power-on reset generation in a compact

5-pin SOT-23 package. Features include two

undervoltage detectors, one fixed and one adjustable,

and a choice of reset outputs. One undervoltage

detector compares VDD against a fixed threshold. Ten

factory-programmed thresholds are available. The

second, user-adjustable input is compared against a

300 mV reference. This low reference voltage allows

for the monitoring of voltages lower than those

supported by previous supervisor ICs.

The reset outputs are asserted at power-on and at any

time either voltage drops below the programmed

threshold voltage and remains asserted for 140 ms

(min.) after they subsequently rise back above the

threshold boundaries. Manual reset functionality can

be provided by a switch connected between ground

and the /MR input. A wide choice of voltage thresholds

provides for a variety of supply voltages and

tolerances. Hysteresis is included to prevent chattering

due to noise. Typical supply current is a low 3.5 μA.

Features

• Monitors Two Independent Power Supplies for

Undervoltage Conditions

• One Fixed and One User-Adjustable Input

• Choice of Ten Factory-Programmed Thresholds

• Adjustable Input can Monitor Supplies as Low as

0.3V

• Generates 140 ms (min.) Power-On Reset Pulse

• Manual Reset Input

• Choice of Active-High, Active-Low, or Open-Drain

Active-Low Reset Outputs

• Inputs May be Pulled Above VDD (7V abs. max.)

• /RST Output Valid Down to 1.2V

• Ultra-Low Supply Current, 3.5 μA Typical

• Rejects Brief Input Transients

• IttyBitty 5-pin SOT-23 Package

• Pin-Compatible upgrade for MAX6306/09/12

Applications

• Monitoring Processor ASIC or FPGA Core and

I/O Voltages

• PDAs, Handheld PCs

• Embedded Controllers

• Telecommunications Systems

• Power Supplies

• Wireless/Cellular Systems

• Networking Hardware

MIC2774属于集成电路（IC） > 监控器。微芯科技股份有限公司制造生产的MIC2774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。