ADM709RAN

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PMIC - Supervisors

A supervisor integrated circuit (SIC), sometimes referred to as a Supervisor IC, is an integrated circuit that monitors the supply voltage of a microcontroller. SICs provide additional functionality, such as reset protection, output control and window detection. These functionality are provided to enhance system stability, extend device life cycle, and provide tolerance to power supply noise.

The ADM709RAN is an example of a low cost multiple-output supervisor IC. It is a single-chip circuit that includes a voltage reference and an internal voltage detector, output control logic, and an output amplifier. It provides a wide operating temperature range, and reduced external component count. The ADM709RAN is designed to monitor multiple power supplies in mixed signal, mixed voltage circuits.

Application Field

The ADM709RAN is designed to monitor multiple power supplies in mixed signal, mixed voltage circuits. It can also be used to monitor general power supplies, such as battery voltage. The ADM709RAN can be used in notebook computers and portable devices with multiple power rails, or in other power sensitive applications.It can also be used for:

• Memory systems
• LCD backlight control
• Security systems
• Battery management
• RFID and wireless device control

Working Principle

The ADM709RAN is a low-cost, single-chip supervisor IC. It includes two voltage detectors for two different voltage levels, an output amplifier, and a reset logic circuit. Additionally, an internal voltage reference is used to set the reset voltage.The ADM709RAN monitors two different supply voltages. These voltages are compared to the internal reference voltage. When the monitored voltage is lower than the reference voltage, an active-low signal is generated at the output of the detector. This signal is then used to trigger the reset logic circuit, which prevents further operation of the microcontroller.In addition to the reset protection, the ADM709RAN also provides other features to increase system reliability. It has an output control logic, which enables precise control of the power-on sequence of different digital blocks in the system. It also has a window detector, which will issue an active-low signal when the supplied voltage is within a certain range between the two monitor voltage levels.

The ADM709RAN is an ideal solution for monitoring multiple power supplies in mixed signal, mixed voltage systems. It is a low cost, integrated circuit that provides reset protection, output control and window detection. These features reduce component count and increase system stability, extending the life cycle of the device.

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