LP3470IM5-4.63

Supervisors Overview

The LP3470IM5-4.63/NOPB is a voltage supervisory circuit manufactured by Texas Instruments, designed for monitoring power supply integrity in electronic systems. It operates within a maximum supply voltage of 5.5 V and features a fixed reset threshold voltage of 4.63 V with 1% accuracy. The device provides an active low, open-drain output and includes a programmable reset delay time of 2 ms. It is housed in a compact SOT-23-5 package suitable for surface mount technology. The component supports a minimum operating temperature of -40°C and a maximum of +85°C, ensuring reliable performance across standard industrial ambient conditions.

Supervisors Feature Summary

• Provides precise voltage supervision with a fixed 1% accurate reset threshold to detect undervoltage conditions.
• Features an active low, open-drain output interface compatible with various digital logic families.
• Includes a programmable reset delay controlled by an external capacitor to manage system startup sequences.

Supervisors Applications

• Monitoring microprocessor power rails during system initialization
• Supervising battery-powered device voltage levels
• Ensuring stable operation in embedded control circuits

Supervisors Procurement Notes

Verify the specific suffix designation, as variations such as NOPB indicate lead-free compliance and RoHS status. Confirm the exact threshold voltage matches the design requirement, as the LP3470 series offers multiple fixed options. Check current lifecycle status, as some variants may be marked as Not Recommended for New Designs (NRND). Ensure the SOT-23-5 footprint aligns with existing PCB layouts before finalizing procurement orders.

Supervisors Selection Notes

Select this component when a fixed 4.63 V threshold is required for single-input voltage monitoring. Consider the 2 ms base delay and external capacitor requirements for timing adjustments. Evaluate the SOT-23-5 package size against available board space constraints. Compare against the LP3470A series if higher voltage tolerance or extended temperature ranges are necessary for the specific application environment.

Supervisors Part Context

This part belongs to the LP3470 family of tiny power-on reset circuits from Texas Instruments. The family shares common architectural features including low quiescent current and simple external component requirements. Variants within the series differ primarily in their fixed reset threshold voltages and packaging options, allowing designers to choose specific voltage monitoring points without altering the core circuit topology.

Supervisors Replacement Considerations

Direct substitutes include other LP3470 variants with different threshold voltages if the 4.63 V specification is flexible. Cross-reference with LP3470A series parts for enhanced specifications, noting potential differences in operating voltage range and temperature ratings. Verify pinout compatibility when considering alternative manufacturers' supervisory ICs.