ADM691AN

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PMIC (Power Management IC) or Supervisors are widely used in embedded systems as they help in controlling and monitoring the power consumption. ADM691AN is one such power management integrated circuit which is widely used in such applications. This article gives a brief overview of the applications of ADM691AN and the working principle behind it.

ADM691AN is a low-cost, versatile supervisor IC that is designed for use in embedded systems. It provides an adjustable voltage reset output and can be used with a wide range of supply voltages. With a low quiescent current of 10uA, ADM691AN can help save power and reduce overall system power consumption. It is also capable of monitoring both supply voltages (3.3V/5V ) and features an open collector/drain output that can be used to directly drive external logic.

Applications of ADM691AN include:

• Computer motherboards and computer systems.
• Computer power supplies.
• Automotive electronics.
• High-performance microprocessor systems.
• Consumer electronics.

ADM691AN can be used in embedded systems that require the monitoring of voltages and the outputting of reset signals for processor protection. The IC monitors the power supply voltages, and when the voltage falls below the reset threshold, a reset signal is sent to the processor to ensure safe operation. The IC can also be used to trigger a system reset when the monitored voltage exceeds a preset upper limit.

In addition to reset outputs, ADM691AN also features an active low reset enable (RESEN) pin. This is used to enable/disable the reset output. This feature can be used to prevent unwanted resets or to provide additional control over the reset output.

The working principle of ADM691AN can be explained as follows: The ADM691AN is designed to monitor the supply voltage and when the voltage rises or falls below a preset threshold, the reset signal is activated. The threshold points can be adjusted using the on-chip resistance scaling and the RESEN pin. The Output pin can be used to directly drive external logic.

The reset signal is directly proportional to the supply voltage and the output is adjustable over voltage ranges of 1.2V to 3.6V. The integrated low quiescent current of 10uA helps to save power and reduce overall system power consumption.

In summary, ADM691AN is an excellent choice for embedded systems that require the monitoring of power supply voltages and the outputting of reset signals for processor protection. This integrated circuit can help minimize power consumption and reduce overall system power consumption while providing an adjustable voltage reset output. The reset enable (RESEN) pin is also ideal for providing additional control of the reset output.

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