TPS3840PL31DBVR

Supervisors Overview

The TPS3840PL31DBVR is a nanopower voltage supervisor from Texas Instruments designed for monitoring single power rails. It operates within a supply voltage range of 1.5 V to 10 V and features a fixed threshold voltage of 3.1 V with 1% accuracy. The device draws a typical quiescent current of 300 nA, extending battery life in low-power applications. It provides an active-low push-pull reset output and includes manual reset functionality. The component supports a programmable reset delay time ranging from 50 μs to 6.2 s via an external capacitor. It functions reliably across an industrial temperature range of -40°C to +125°C and is housed in a compact SOT-23-5 package.

Supervisors Feature Summary

• Nanopower consumption with typical 300 nA quiescent current for extended battery operation
• High precision voltage monitoring with 1% threshold accuracy and built-in hysteresis
• Active-low push-pull output topology eliminating the need for external pull-up resistors
• Programmable reset delay time adjustable from 50 μs to 6.2 s using an external capacitor

Supervisors Applications

• Portable battery-powered systems requiring low standby current
• Industrial automation controllers and PLCs
• Smart metering infrastructure
• Consumer electronics safety supervision

Supervisors Procurement Notes

Verify the specific suffix '31' confirms the 3.1 V threshold voltage variant. Confirm the 'PL' designation indicates the active-low push-pull output type required by the circuit design. Ensure the DBV package matches the PCB footprint. Check RoHS compliance status if restricted substances are mandated. Validate that the manual reset pin configuration aligns with system logic requirements.

Supervisors Selection Notes

Select this part when a fixed 3.1 V threshold is needed without external resistor dividers. The push-pull output simplifies interface design compared to open-drain variants. Consider the 300 nA current draw for strict energy budget constraints. Verify that the 10 V maximum input voltage covers the highest expected rail voltage. Ensure the SOT-23-5 package size fits the available board space.

Supervisors Part Context

This component belongs to the TPS3840 family of high-input voltage supervisors. The family offers various threshold voltages and output topologies (open-drain, active-low push-pull, active-high push-pull). The TPS3840 series is engineered for applications demanding precise voltage monitoring with minimal power impact. It serves as a critical protection element against brown-out conditions and improper sequencing in embedded systems.

Supervisors Replacement Considerations

TPS3840PL30DBVR: Similar push-pull output but with a 3.0 V threshold. TPS3840PL33DBVR: Similar push-pull output but with a 3.3 V threshold. TPS3840DL31DBVR: Same threshold but uses open-drain output requiring a pull-up resistor.