MAX6382XR17D3+T

PMIC - Supervisors

A PMIC supervisor (or Supervisory Circuit) is a type of power management integrated circuit (PMIC) that is used within onboard systems to provide circuit protections and reset functions. Supervisory circuits are designed to ensure that embedded microcontrollers or processors can start up and maintain a stable operating state under normal operating conditions. Supervisory circuits are usually embedded into board designs and may be implemented as a device reset controller, system reset monitor, voltage detection circuit, sequencer and battery-operated systems.

The MAX6382XR17D3+T is a supervisor for microprocessor (MPU)/microcontroller (MCU) power supply monitoring, sequenced systems, and power-on reset applications. This device is a microprocessor-based supervisor with voltage supervisory, power-on reset, and 4 selectable reset timeout functionality. It includes a low power, precision voltage reference and an active-low reset output.

Application Field

The MAX6382XR17D3+T is a highly reliable, system-on-chip (SoC) reset supervisor. This device provides robust system protection by monitoring two power-supply rails and providing active-low system reset in the event of an undervoltage condition. This device provides accurate reset thresholds and configurable reset delay times. It also features power-on reset (POR) to ensure that all system registers are properly initialized during power transitions.

The device is designed for protecting and associated MCU/MPU applications such as A/V systems, industrial applications and automotive applications. The reset output is adjustable for various reset timeout periods, allowing designers to assure that the MCU/MPU operates in the desired and expected manner. Typical applications are battery-operated systems, voltage detection, and timing sequences.

Working Principle

The MAX6382XR17D3+T works by providing a precision voltage reference and an active-low reset for monitoring and controlling the system health. In normal operation, the voltage reference acts as a reference for the system and the low-power comparator compares the system voltage supply against the reference. If the voltage falls below the voltage threshold (either power supply or any other input voltage level) an active-low reset is asserted and the system is reset.

The device comes with the ability to select both the lower threshold voltage and the timeout expiration period. This allows the designer to ensure that the device will reset the system before it reaches an incorrect operating state. The device can also be used to sequence systems and ensure that the system reaches its correct state with the correct timing. In addition, the device has the ability to assert reset both when it detects an undervoltage condition and during an external reset.

In summary, the MAX6382XR17D3+T is an accurate, low power supervisor for monitoring and controlling the system health. It provides an active-low reset in the event of an undervoltage condition and has the ability to configure the reset timeout for various applications. It is also used to sequence systems and ensure that the system reaches its correct operating state in the correct timing.