MAX6338BUB+T

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PMIC - Supervisors MAX6338BUB+T Application Field and Working Principle

A supervisor is an integrated circuit (IC) designed to monitor the performance of various circuits in a power management integrated circuit (PMIC). Supervisors include voltage detectors, voltage supervisors and watchdog timers. The MAX6338BUB+T is a precision, low-power microprocessor supervisor circuit with a reset output. It is used in a wide variety of electronic designs, ranging from microprocessor-based systems to DVD players to power supplies.

The MAX6338BUB+T provides a reset output that is triggered by either an active-low level or an active-high level on the RESET or RPO pin. The MAX6338BUB+T can be programmed to operate with two available reset thresholds ranging from 1.67V to 6.2V. The reset output can be used to reset a wide variety of integrated and discrete components, including microprocessors, DSPs, FPGAs, application-specific ICs (ASICs), and other logic devices.

The MAX6338BUB+T is a very low-power device with a typically supply current of 200nA. It is designed to monitor millisecond-infrequent power-fail events. It has an open-drain active-low reset output followed by a 1.50msec power-fail delay time. It has a wide operating supply voltage range of 1.45V to 6.2V and a maximum operating ambient temperature of 85°C.

The MAX6338BUB+T is ideal for a wide variety of applications, including consumer electronics, embedded systems, industrial control systems, medical devices, and many more. In consumer electronics, the MAX6338BUB+T can be used to monitor the power supply inputs of digital cameras, DVD players, HDTVs, and other similar devices. In embedded systems, the MAX6338BUB+T can detect brownouts in battery-powered systems, monitor power-source alarm signals, and ensure proper system reset after power-fail events. In industrial control systems, the MAX6338BUB+T can be used to detect and alert for over-voltage conditions. In medical equipment, the MAX6338BUB+T can detect potential power-failure events and reset the system accordingly.

In terms of its working principle, the MAX6338BUB+T uses a voltage-sensing threshold. When the voltage sensed at the RESET or RPO pin exceeds the operating threshold, the IC activates the reset output, indicating a failed power condition. As soon as the voltage falls below the operating threshold, the IC deactivates the reset output and returns to normal operation. The MAX6338BUB+T also has a low-power mode, which is enabled when the voltage at the RESET or RPO pin drops below 0.5V. In this mode, the supply current is reduced to 0.2µA, allowing the supervisor to consume minimal power while monitoring the power supply.

The MAX6338BUB+T provides a reset output with an unfiltered rise time of 150µsec and a fall time of 800µsec. It also has an active-low reset output with a trip time of 1.5msec. The MAX6338BUB+T is also available in an automotive-grade package with a maximum operating temperature range of -40°C to 125°C.

In conclusion, the MAX6338BUB+T is a versatile and reliable supervisor IC that is used in a wide variety of power management applications. It has a wide operating temperature range, low power consumption, and high reset accuracy. It is the perfect choice for designers looking for a robust solution for power-fail detection and reset control.

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