MIC2774H-28BM5-TR

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Discontinued at Digi-Key
Type:	Multi-Voltage Supervisor
Number of Voltages Monitored:	2
Output:	Complementary
Reset:	Active High
Reset Timeout:	140 ms Minimum
Voltage - Threshold:	2.81V, Adj
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	SC-74A, SOT-753
Supplier Device Package:	SOT-23-5
Base Part Number:	MIC2774

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Introduction to MIC2774H-28BM5-TR

The MIC2774H-28BM5-TR, is a Pulse Width Modulated (PWM) Supervisor IC with a variable dead time and is part of the Micrel family of products. This type of IC is commonly used as a voltage supervisor, performing tasks such as brown-out detection, over-voltage protection, over-temperature protection, and system reset. This device makes integration of voltage protection and precision voltage monitoring functions into a single chip easy. It is able to offer low power consumption and supports both low-voltage and high-voltage supervisor functions.

Application Field

Due to its ability to provide both low-voltage and high-voltage supervision capabilities, the MIC2774H-28BM5-TR is used in a wide variety of applications. These include consumer electronics, telecommunications, automotive systems, industrial systems, gaming systems, and servers.The reliable design of the MIC2774H-28BM5-TR provides the necessary protection for a variety of systems. Whether it is low-voltage or high-voltage, it is capable of ensuring that the system is stable and functions properly. The device can also be used as a reset signal generator, allowing for power up and power down reset signals. The signal counter circuitry enables the calculations of the on-time and off-time signals, providing a reliable supervision of the supply voltage.

Working Principle

The MIC2774H-28BM5-TR is built on a Power MOSFET operation principle. It uses an adjustable timer that is configured with an external resistor and capacitor to set the desired voltage trip points and pulse width modulation (PWM) duty cycle. When the trip levels are exceeded, the device switches on an internal FET over the entire operating range, which is configured with an external load switch setting.The MIC2774H-28BM5-TR is designed to operate over a wide voltage range and can operate in either an open drain or an active pull-up mode. When operating in active pull-up mode, the device drives a P-channel MOSFET to provide an output voltage in addition to the voltage level supervisor. In open drain mode, the device drives an N-channel MOSFET to provide an output voltage for monitoring the voltage range. The on-time and off-time signals generated by the device are used to control the FET switch and regulate the power supply voltage. The adjustable timer is used in the device to provide an adjustable trip point. The voltage source and the current source circuit generate the power for the device. The delay time can also be adjusted to suit different applications.

Conclusion

The MIC2774H-28BM5-TR is an important device in any system that strives to maintain stable, reliable performance while providing protection of the power sources. This device offers both low-voltage and high-voltage supervisor functions, adjustable timer and adjustable delay time, allowing for a wide range of applications and customizations. The adjustable timer and delay time provide superior protection to the systems, ensuring that all components are operable and functioning properly. The device also allows for power up and power down reset signals, ensuring that systems stay within the necessary parameters. With the MIC2774H-28BM5-TR, protection and safety are just a step away.

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