MAX809LTR Integrated Circuits (ICs)

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PMIC – Supervisors are power management ICs used for embedded systems and microcontrollers. They are designed to ensure proper power supply to the circuits, as well as provide reliable under-voltage and over-voltage protection. The MAX809LTR is a supervisor IC that is part of Maxim Integrated’s family of supervisors. This device is used to monitor the supply voltage of a system and provide necessary signals when the voltage is out of range.

The MAX809LTR is suitable for applications such as industrial automation, energy-saving systems, and home appliances, where a robust power supply is required for reliable operation. The device provides protection against both over-voltage and under-voltage conditions, as well as brown-out situations where the input voltage drops below the threshold. Additionally, it features wide voltage range and low power consumption.

The MAX809LTR features an adjustable voltage monitor (AVM) input with an adjustable range (1.0V – 9.8V). The AVM senses the voltage at the input and signals an under-voltage condition when voltage is below the programmed threshold. An internal comparator monitors the voltage at the AVM pin and alerts an external circuit, allowing the input voltage to be monitored without the need for an external comparator circuit. When the input voltage crosses the threshold, an over-voltage signal is generated, providing a warning to the system. The device also features a hysteresis function to provide accurate voltage monitoring and reduce false triggering from noisy signals.

To reset the system, the MAX809LTR has an integrated reset timer. This timer has two separate delay modes; one for normal operations, and one for when the voltage is below the threshold. During normal operations, the device will automatically clear the reset after a 3.2s delay. If the input voltage drops below the threshold, the reset will be held until the input voltage rises above the pre-defined voltage threshold for a duration of 1.6s. The reset timer also features an adjustable reset time-out, allowing the user to control the length of time the reset is held.

The MAX809LTR offers several features to ensure robust operation, such as fault detection and power-up ramp. The fault detector monitors the AVM pin and the reset pin, generating a FAULT signal if either one is out of range. In addition to this, the device features a power-up ramp to slowly increase the voltage to the required level, helping to prevent false triggering due to sudden power surges. This power-up ramp has an adjustable build time, allowing the user to program the length of time the ramp will last.

The MAX809LTR is an advanced supervisor IC that is designed to provide reliable monitoring and protection for embedded systems and microcontroller applications. Its adjustable voltage monitor, hysteresis function and reset timer provide a comprehensive power management solution. Additionally, its low power consumption and wide voltage range make it suitable for a variety of applications, from industrial automation to home appliances.

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