LP3470M5-4.38

Supervisors Overview

The LP3470M5-4.38/NOPB is a voltage supervisory circuit manufactured by Texas Instruments, designed to monitor a single input channel for power supply integrity. It features an active-low open-drain output that asserts when the monitored voltage drops below the precise 4.38 V threshold. The device incorporates a fixed reset delay time of 2 ms to ensure stable system recovery during power transitions. It operates within a maximum supply voltage of 5.5 V and supports surface-mount installation in a compact SOT-23-5 package. The component is rated for operation across a temperature range extending from -20°C to +85°C.

Supervisors Feature Summary

• Provides precise voltage supervision with a fixed 1% reset threshold accuracy
• Features an active-low open-drain output for direct interface with digital logic
• Includes a programmable or fixed reset delay mechanism to prevent false triggering
• Designed for ultra-low quiescent current consumption to extend battery life

Supervisors Applications

• Portable electronic devices requiring efficient power management
• Embedded systems needing reliable power-on reset signals
• Battery-operated equipment monitoring critical voltage levels
• Industrial control units operating in moderate temperature environments

Supervisors Procurement Notes

Verify the specific suffix designation, as the LP3470 series includes variants with different thresholds and packages. Confirm RoHS compliance status and check for obsolescence notices, as some versions are marked as Not Recommended for New Designs (NRND). Ensure the selected part matches the required thermal performance and electrical specifications for the target application environment before finalizing procurement.

Supervisors Selection Notes

Select this component when a fixed 4.38 V threshold is required for single-channel monitoring. Consider the SOT-23-5 package constraints for space-limited designs. Evaluate the 2 ms reset delay against system startup requirements. Compare against the LP3470A series if extended temperature ranges or higher voltage ratings are necessary for the specific application scenario.

Supervisors Part Context

This part belongs to the LP3470 family of tiny power-on reset circuits from Texas Instruments. The family offers various threshold voltages and packaging options to suit diverse design needs. The LP3470M5 variant specifically targets cost-sensitive applications with standard commercial temperature ranges. It serves as a fundamental building block for ensuring system stability during power-up and brown-out events.

Supervisors Replacement Considerations

The LP3470A438DBVR is a documented alternative within the same manufacturer portfolio, offering similar functionality with potentially different thermal or voltage specifications. Verify pin compatibility and electrical parameters before substitution.