TPS3852H33DRBT

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The TPS3852H33DRBT is a family member of power-management integrated circuits (PMIC) that are classified as supervisors. A supervisor (also called a supervisor integrated circuit or watchdog) is designed to monitor power systems and reset the system to a known state in case of failure or lockup. The TPS3852H33DRBT offers a versatile and robust solution for protecting power systems using a novel integrated architecture and patented technologies. This article covers the applications field and working principle of the TPS3852H33DRBT.

Applications

The TPS3852H33DRBT is a dedicated supervisor IC intended for a variety of embedded system applications, including battery-operated devices, telecommunication systems, servers, and smart home electronics. The device is suitable for use in low-power systems, such as those that support always-on applications. It can also be used in a variety of other systems where supervisor functionality is required.

The TPS3852H33DRBT has a high level of integration, low quiescent current draw, low power consumption, and a wide operating temperature range of -40°C to +125°C. The device has an adjustable trip point and reset time that can be set to meet specific application needs. It also has an integrated voltage reference and analog comparator with a wide input common-mode range, enabling it to be used in battery-powered or other strongly varying voltage supply applications. In addition, the device’s fail-safe circuitry monitors and protects itself from false trips and erroneous voltage levels.

Working Principle

The TPS3852H33DRBT is a supervisor IC that acts as a failsafe. It is designed to monitor the status of the system, interrupting the system in the event of a fault or malfunction. Once interrupted, the supervisor IC resets the system and ensures that the system is returned to a known good state. It does this by using a variety of techniques, including:

• Monitoring the supply voltage to detect an undershoot or overshoot when the supply voltage deviates from the programmed setpoint.
• Monitoring the voltage on the RESET pin and triggering a reset if the voltage reaches an internal trip point.
• Monitoring the RESET pin for an external reset pulse.
• Monitoring the RESET_BAR pin for a reverse reset pulse.

The TPS3852H33DRBT also includes several integrated protection features, such as over-temperature protection, ESD protection, and current-limiting protection. The device also features an analog comparator with a wide common-mode range, allowing it to be used in a variety of voltage supply applications. Moreover, a unique patented timeout mechanism allows the device to reset the system after an adjustable time period, even if the supply voltage has returned to an acceptable range.

Conclusion

The TPS3852H33DRBT is a highly integrated and versatile supervisor IC designed for a variety of embedded system applications. The device can monitor and protect the power system from various types of faults, including supply voltage instability, input voltage undershoot or overshoot, or slow responses. The device also has an adjustable trip point, reset time, and timeout mechanism that can be programmed to meet specific application needs. Additionally, the integrated protection features, including ESD and current-limiting protection, provide additional system security.

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