TPS3838E18QDBVRQ1

Supervisors Overview

The TPS3838E18QDBVRQ1 is an automotive-grade voltage supervisory circuit manufactured by Texas Instruments. It operates within a supply voltage range of 1.5 V to 6 V and features a fixed threshold voltage of 1.71 V with an overvoltage threshold of 1.74 V. The device provides a manual reset function with a selectable delay time of either 10 ms or 200 ms. It delivers high accuracy of 1.75% and consumes a typical quiescent current of 250 nA. Packaged in a compact SOT-23-5 format, it supports active low open-drain outputs and functions reliably across an extended temperature range from -40°C to +125°C.

Supervisors Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliable operation in vehicle environments.
• Ultra-low power consumption with a typical operating current of 250 nA suitable for battery-backed applications.
• Configurable reset delay options allowing selection between 10 ms and 200 ms for system timing flexibility.

Supervisors Applications

• Monitoring power rails in automotive electronic control units (ECUs).
• Supervising voltage levels in infotainment and instrument cluster systems.
• Providing reset signals for microcontrollers in harsh automotive thermal conditions.

Supervisors Procurement Notes

Verify the specific suffix QDBVRQ1 matches the required automotive grade and package configuration. Confirm that the fixed 1.71 V threshold aligns with the target supply rail requirements. Ensure the selected delay option (10 ms or 200 ms) meets the system startup timing specifications. Cross-reference the manufacturer datasheet for any recent pinout or electrical characteristic updates.

Supervisors Selection Notes

Select this component when a fixed low-voltage threshold near 1.71 V is required for single-input monitoring. Consider the 250 nA quiescent current if power efficiency during standby is critical. The SOT-23-5 package offers space constraints advantages compared to larger footprints. Verify compatibility with the system's maximum input voltage limit of 6 V before integration.

Supervisors Part Context

This part belongs to the TPS3838 family of NanoPower Supervisory Circuits designed specifically for automotive applications. It complements other variants like the TPS3838K33QDBVRQ1 which offer different threshold voltages. The series emphasizes low power and small size while maintaining high precision for critical system supervision tasks.

Supervisors Replacement Considerations

Direct substitutes include TPS3838E18DBVRG4 for commercial grade applications and TPS3838E18MDBVREP for tape-and-reel packaging variations. For higher voltage thresholds, consider TPS3838K33QDBVRQ1. Always verify pin compatibility and electrical parameters before swapping.