CAX809STBI-T3

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PMIC (Power Management Integrated Circuit) usually refer to integrated circuits which combines a variety of power management features into a single device. Supervisors are a type of PMIC designed to monitor power supply voltages and provide reliable power-on reset (POR) and other functions. The CAX809STBI-T3 from On Semiconductor is one such supervisor, providing a versatile set of features for a range of applications.

The CAX809STBI-T3 is part of the Fixed Supervisors family, which includes supervisor ICs that operate over a single fixed voltage range. The CAX809STBI-T3 is unique due to the fact that it can operate over two power supply voltages, 1.8V and 3.3V. This makes it a good choice for applications that require a wide range of power supply input voltages, such as portable electronics.

The core features of the CAX809STBI-T3 include:

• Accurate, low temperature-coefficient Power-On Reset (POR) threshold
• On-chip precision voltage reference
• Programmable over- and undervoltage thresholds
• 0.8V to 5.5V operating voltage range
• Manual reset input
• Active-low power-on reset output

The CAX809STBI-T3 supervisor is primarily used as a reset controller. Its primary job is to monitor the input voltage and generate an active-low reset signal in the event of an overvoltage, undervoltage, or manual reset input event. The reset signal can be used to initiate a system or system component reset. The reset signal can also be connected to an external voltage regulator, allowing for a controlled power-up and power-down sequence.

In addition to providing a reset signal, the CAX809STBI-T3 can be used to provide a certain level of system protection. The overvoltage and undervoltage detection features allow it to detect and respond to changes in the input voltage. This can prevent damage to system components due to voltage spikes or other irregularities.

The CAX809STBI-T3 supervisor can also be used to control external power supplies. By connecting the reset output to the external power supply, the supervisor can prevent the external supply from powering up the system until the desired voltage level has been reached. This ensures that the system does not power up too quickly or with a voltage that is higher than required.

The CAX809STBI-T3 is a versatile supervisor IC that can be used in a wide range of applications. It is well suited for a number applications in portable electronics, such as smart phones, tablets, wearables, and other battery-powered devices. It can also be used in applications that require monitoring of multiple power supply voltages, such as industrial control systems or automotive electronics.

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