Dual-voltage supervisor for 3.3V and 5V automotive rails
The TPS3306-33QDRQ1 is a Texas Instruments multi-voltage supervisor that monitors two supply rails simultaneously — a 2.93V threshold for a 3.3V bus and a 4.55V threshold for a 5V bus, with an active-low open-drain reset output that pulls low on any undervoltage condition. This part is qualified to AEC-Q100, making it suitable for automotive applications that require documented PPAP and IATF 16949 compliance.
The reset output holds low for a minimum of 70 ms after both monitored voltages rise above their thresholds, ensuring downstream devices complete their power-on reset sequence before release.