LP3470M5-4.00

Supervisors Overview

The LP3470M5-4.00/NOPB is a voltage supervisory circuit manufactured by Texas Instruments, designed for monitoring power supply integrity in electronic systems. It features an active-low open-drain output that asserts when the monitored input voltage drops below a precise threshold of 4.00 V with 1% accuracy. The device operates within a supply voltage range up to 5.5 V and includes a programmable reset delay time of 2 ms, adjustable via an external capacitor. It is housed in a compact SOT-23-5 surface-mount package and supports operation across a temperature range of -20°C to +85°C.

Supervisors Feature Summary

• Provides precise voltage supervision with a fixed 4.00 V threshold and 1% accuracy
• Features an active-low open-drain output for direct interface with digital logic
• Includes a programmable reset delay controlled by an external capacitor

Supervisors Applications

• Power-on reset generation for microcontrollers and processors
• Battery-powered system voltage monitoring
• Embedded controller supervision in portable electronics

Supervisors Procurement Notes

Verify the specific suffix (e.g., NOPB) against the datasheet to confirm RoHS compliance and lead-free status. Confirm the exact threshold voltage variant matches the design requirement, as the LP3470 series offers multiple fixed thresholds. Check component lifecycle status, as some variants may be marked as Not Recommended for New Designs (NRND). Ensure the SOT-23-5 package footprint aligns with the PCB layout specifications.

Supervisors Selection Notes

Select this component when a fixed 4.00 V threshold is required for power rail supervision. Consider the 2 ms reset delay characteristic; if longer delays are needed, evaluate other LP3470 variants or adjust the external capacitor value. Verify that the maximum operating voltage of 5.5 V accommodates the highest expected supply voltage. Compare static current consumption requirements against other low-power supervisors in the portfolio.

Supervisors Part Context

This part belongs to the LP3470 family of tiny power-on reset circuits from Texas Instruments. The family provides various fixed threshold voltages optimized for different standard supply rails. The LP3470M5-4.00/NOPB specifically targets applications requiring a 4.00 V trip point, distinguishing it from other variants like the 4.38 V or 4.63 V versions within the same package and functional architecture.

Supervisors Replacement Considerations

Publicly confirmed substitute part numbers include LP3470M5-4.00/NOPB (equivalent listing) and LP3470M5X-4.00/NOPB. Cross-reference pinouts and electrical characteristics before substitution.