MAX814LESA+

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PMIC - Supervisors: MAX814LESA+ application field and working principle

PMIC or Power Management Integrated Circuits are important components in manufacturers of automobiles, consumer electronics, computers, and data centers. Supervisors are one type of PMIC, which is an integrated circuit designed to monitor voltage and current levels that are critical to the health of sophisticated electronic systems. One example of a supervisor is the MAX814LESA+, which is an adjustable low-power supervisor designed to monitor and reset circuits with a relatively low quiescent current. It is well-suited for power supply and battery-operated applications such as portable computers, PDAs, telecommunication equipment, industrial process control systems, vehicle power tools, and medical devices.

The MAX814LESA+ is a particularly effective supervisor because it is a voltage-dependent reset that implements the ability to monitor both power supply and battery backup supplies. It functions in two modes: a reset mode and a watchdog mode. In reset mode, when the input voltage falls below the reset threshold, the MAX814LESA+ will instantly reset the circuit and maintain that reset until the input voltage returns to a level greater than the reset threshold. In watchdog mode, the MAX814LESA+ will reset the system if it fails to detect a signal from an external device.

One unique feature of the MAX814LESA+ is its integrated low-battery detector. This provides an accurate voltage monitoring circuit with a hysteresis value that is adjustable through an external resistor, allowing for precise reset thresholds. The low-battery detector is also powered independently from the system power, allowing the MAX814LESA+ to provide an accurate voltage monitoring circuit even when the system power is off. Other features of the MAX814LESA+ include a wideening of the reset delay window, which allows the circuit to remain in a reset state for as long as needed; an adjustable timeout period, which allows the circuit to remain in a reset state for a predefined amount of time; and shutdown mode, which allows the device to be shut down without resetting the circuit.

The MAX814LESA+ is an excellent supervisor for critical applications that require power and battery-dependent systems to be protected from any unnecessary shutoffs. It is especially useful in mobile and portable applications, where batteries and power sources may need to be monitored and reset periodically. With its integrated low-battery detector and adjustable timeouts, the MAX814LESA+ can reliably monitor a wide range of voltage levels and reset circuits as needed.

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