MIC706SN

Series:	--
Packaging:	Tube
Part Status:	Obsolete
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	--
Reset:	Active Low
Reset Timeout:	140 ms Minimum
Voltage - Threshold:	2.93V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Through Hole
Package / Case:	8-DIP (0.300", 7.62mm)
Supplier Device Package:	8-PDIP
Base Part Number:	MIC706

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Introduction

The MIC706SN is a two-stage supervisor used in power management applications. It is a low-power and low-cost device consisting of a limiter, reset timer, and voltage supervisor. It is designed to protect equipment or systems from overvoltage, undervoltage, extended power supply transients, and voltage ripple. The two-stage feature requires valid logic level output high and low of the second stage to complete reset of the supply, thus providing extra overvoltage/undervoltage protection and system level reliability.

Application Field and Working Principle

The MIC706SN is designed primarily for power management applications such as residential servers, wireless modems, and portable digital devices, where good system reliability and safety are important. The MIC706SN can also be used in applications where prolonged brownouts may occur and the device can provide overvoltage protection, limiting the output voltage to a preset level, reducing the stress on power supplies and system components.The MIC706SN typically contains two operating modes: a Trip-Reset mode and a Brownout Detection mode. In the Trip-Reset mode, the device trips when the supply voltage reaches the Trip level and resets the supply when the voltage drops below the Reset level. The MIC706SN can be set to trip at any value between 4.0V and 6.0V, and reset between 2.4V and 2.7V. The Brownout Detection mode allows the user to adjust the upper and lower trips to detect when the voltage drops below 4.5V or rises above 4.8V.The MIC706SN monitors the input voltage, which is the difference between the supply voltage and the reference voltage, with a 0.5V bandgap voltage reference. The trip and reset points are programmed using external resistors. The MIC706SN output has an open-drain design, and an external pull-up resistor can be connected to a logic high level.Once the voltage reaches the trip point, the MIC706SN’s internal comparator drives the output low and trips the device. This output can be used for common system functions, such as setting a reset flag or power-on-reset bit. The output stays low and the device is tripped until the voltage drops below the reset voltage, at which point the output goes high and the MIC706SN is reset.

Conclusion

The MIC706SN is a two-stage supervisor used primarily in power management applications. It is designed primarily to protect systems and components from overvoltage, undervoltage, extended power supply transients, and voltage ripple. The two-stage feature requires valid logic level output to complete reset of the supply, thus providing extra overvoltage/undervoltage protection and system level reliability. It features two operating modes: a Trip-Reset mode and a Brownout Detection mode. The MIC706SN can be set to trip at any value between 4.0V and 6.0V, and reset between 2.4V and 2.7V. The MIC706SN monitors the input voltage, which is the difference between the supply voltage and the reference voltage, with a 0.5V bandgap voltage reference.

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