TPS3828-33QDBVRQ1 - Texas Instruments

The TPS3828-33QDBVRQ1 is a highly reliable, low-power supervisory circuit designed by Texas Instruments to monitor power supply functionality in digital systems. It is particularly engineered to cater to the stringent requirements of automotive and industrial applications, ensuring optimal system performance and safety.

This device features a fixed-sense threshold voltage of 3.3V, which allows it to keep a close watch on the system voltage. When the monitored voltage falls below the 3.3V threshold, the TPS3828-33QDBVRQ1 asserts a reset signal, ensuring that the processor or system returns to a known state, preventing software execution errors and potential hardware damage.

The reset time delay is programmable by an external capacitor, which provides designers with the flexibility to tailor the reset assertion time to match specific system requirements. This feature is vital in avoiding unnecessary resets due to transient voltage dips, which are common in harsh electrical environments.

The TPS3828-33QDBVRQ1 is offered in a compact SOT-23-5 package, saving valuable board space while providing robust protection. The device operates over a wide temperature range of -40°C to 125°C, making it suitable for use in extreme environmental conditions. Additionally, the low supply current of 15µA (typical) ensures minimal impact on the overall power budget of the system.

This supervisory circuit also includes a manual reset input, which allows for a system reset to be initiated by an external source. This feature can be used during system maintenance or in situations where a manual intervention is required to reinitialize the system.

The TPS3828-33QDBVRQ1 is an essential component for any system where reliable operation is critical. Its precise voltage monitoring and reset capabilities provide an extra layer of protection to automotive and industrial applications, ensuring that electronic systems operate within their intended parameters, even in the face of power supply irregularities.