LP3470M5-2.93/NOPB

Supervisors Overview

The LP3470M5-2.93/NOPB is a voltage supervisory circuit manufactured by Texas Instruments, designed for monitoring power supply integrity in compact electronic systems. It operates within a maximum supply voltage of 5.5 V and features a precise reset threshold of 2.93 V with 1% accuracy. The device utilizes an SOT-23-5 surface-mount package and provides an active-low, open-drain output. Key electrical parameters include a fixed reset delay time of 2 ms, a quiescent current of 16 uA, and an overvoltage threshold of 2.9593 V. It supports a power dissipation of 300 mW and functions across a temperature range of -20°C to +85°C.

Supervisors Feature Summary

• Provides precise voltage supervision with 1% threshold accuracy to ensure reliable system operation under varying power conditions.
• Features an active-low, open-drain output interface compatible with standard digital logic inputs for direct microcontroller integration.
• Incorporates a fixed 2 ms reset delay timer to prevent false triggering during transient power fluctuations or startup sequences.

Supervisors Applications

• Monitoring battery-powered portable devices requiring low quiescent current consumption
• Supervising voltage rails in embedded systems and microcontroller units
• Ensuring stable power delivery in industrial control circuits operating within specified temperature ranges

Supervisors Procurement Notes

Verify the specific suffix 'M5' corresponds to the required SOT-23-5 package variant and thermal rating. Confirm that the 2.93 V threshold aligns precisely with the target rail voltage plus hysteresis requirements. Check for end-of-life status as similar variants may be marked NRND. Ensure compatibility with existing PCB footprints and reflow soldering profiles for SMD/SMT installation.

Supervisors Selection Notes

Select this component when a fixed 2.93 V threshold is required without external programming capacitors for delay adjustment. Compare against LP3470A series if enhanced precision or different packaging options are needed. Evaluate the 16 uA quiescent current against system standby power budgets. Consider the -20°C to +85°C operating range suitability for the intended environmental conditions compared to wider industrial grade alternatives.

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 to accommodate different standard voltage rails. The LP3470M5 variant specifically denotes the SOT-23-5 package configuration. These devices are designed to replace discrete supervisor solutions, offering integrated functionality in a minimal footprint for space-constrained designs.

Supervisors Replacement Considerations

Public confirmed substitutes include LP3470IM5-2.93/NOPB, which shares identical electrical specifications but differs in the industrial temperature grade (-40°C to +85°C). Verify pinout compatibility before substitution. Other LP3470 variants with different thresholds require circuit redesign.