ADM709RAR

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PMIC - Supervisors

The ADM709RAR is a supervisor IC that provides power management and monitoring features. It is designed to protect the power supply in applications such as mobile phones, audio/video equipment, Digital Verification Systems (DVS), digital audio receivers, medical equipment and automotive systems. The device includes an on-chip comparator, adjustable reset threshold and reset output circuit, providing system protection from power on/off cycling and over-voltage/under-voltage conditions.

Application Field

The ADM709RAR is widely used in applications requiring precision voltage monitoring such as embedded systems, digital receivers, mobile phones, digital audio/video equipment, and automotive systems. It is also used in applications that require power-on/off sequencing, and voltage monitoring of battery-backed memory. The device is designed to monitor and supply the correct operating voltage to the system, and is programmable to trip at any specified voltage level.

Working Principle

The ADM709RAR is a supervisor IC that provides power management and monitoring features. It operates on a 5 V to 17 V power supply and has an adjustable reset threshold between 2.5 V and 4.55 V. The device detects input voltage or current and provides a reset output to alert the system of any changes in the power supply. It also has an open-drain and push-pull output that can be used to generate a reset and an interrupt signal to the processor when the reset threshold voltage is reached.

The ADM709RAR\'s on-chip comparator can be used to detect low voltage, high voltage, and current conditions. When a voltage condition is detected, the device can be programmed to provide a reset pulse or an interrupt signal to the system. In addition, the device has an open-drain or push-pull output that can be used to generate a reset signal in case of an over-voltage or under-voltage condition.

The device also includes an on-chip watchdog timer with adjustable delay time. This timer can be used to set an interval at which the processor is monitored in order to prevent a system crash due to software or hardware failure. If the processor fails to perform a task within this interval, then the system will be reset and restarted.

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