2U3809K33QDBVRG4Q1

Overview

The TPS3809K33QDBVRG4Q1 is a three-pin supply voltage supervisor designed for automotive applications, featuring AEC-Q100 qualification. It monitors a single input voltage with a threshold of 2.93 V and an overvoltage threshold of 2.99 V. The device provides an active low, push-pull reset output with a fixed delay of 200 ms. Operating from 2 V to 6 V, it consumes 9 µA of quiescent current. Accuracy is specified at 2.2%, and it functions within a temperature range of -40°C to +125°C in an SOT-23-3 package.

Feature Summary

• Automotive-grade supervision with AEC-Q100 certification
• Active low push-pull reset output generation
• Low power consumption suitable for battery-backed systems

Applications

• Microprocessor reset circuits in automotive ECUs
• Battery voltage monitoring in vehicle subsystems
• Power management supervision for embedded controllers

Procurement Notes

Verify the specific suffix G4Q1 against official Texas Instruments documentation to confirm pinout and electrical characteristics match the required design specifications. Ensure the component meets AEC-Q100 reliability standards for the intended automotive environment. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit sources. Confirm package type SOT-23-3 compatibility with PCB footprint requirements before procurement.

Selection Notes

Select this component when a simple, low-power voltage supervisor is needed for automotive systems requiring a 2.93 V threshold. The active low output suits logic interfaces requiring negative assertion. Consider the 200 ms delay for system startup timing. Verify that the 6 V maximum input voltage aligns with the monitored rail. The SOT-23-3 package offers space efficiency for compact designs.

Part Context

This part belongs to the TPS3809 family of supply voltage supervisors. It is specifically engineered for automotive electronics, distinguishing it from commercial variants through extended temperature ranges and robustness standards. The Q1 designation indicates automotive qualification. The G4 suffix typically denotes specific packaging or tape-and-reel configurations defined by the manufacturer.

Replacement Considerations

Check for direct cross-reference part numbers listed in Texas Instruments substitution guides. Ensure any replacement maintains the 2.93 V threshold and SOT-23-3 package. Verify AEC-Q100 compliance if used in automotive contexts. Confirm pinout compatibility to prevent board redesign.