LP3470IM5X-4.38

Supervisors Overview

The LP3470IM5X-4.38 is a voltage supervisory circuit manufactured by Texas Instruments, formerly National Semiconductor. It operates within a supply voltage range up to 5.5 V and features a fixed threshold voltage of 4.38 V for monitoring a single input channel. The device provides an active-low, open-drain reset output with a typical reset delay time of 2 ms. It does not include manual reset functionality, a watchdog timer, or a battery backup switch. The component is designed for surface-mount installation in SOT-23-5 packages and supports operation across temperature ranges extending from -40°C to 85°C.

Supervisors Feature Summary

• Provides active-low open-drain reset signal generation based on monitored supply voltage levels
• Fixed threshold detection eliminates need for external resistor dividers for set voltage points
• Compact SOT-23-5 package design suitable for space-constrained surface-mount applications

Supervisors Applications

• Microprocessor power-on reset circuits
• Battery-powered system voltage supervision
• Embedded controller brown-out protection

Supervisors Procurement Notes

Verify the manufacturer designation as Texas Instruments, which acquired National Semiconductor. Confirm the specific suffix indicates the 4.38 V threshold variant. Check lifecycle status as some LP3470 variants are marked Not Recommended for New Designs (NRND). Ensure the SOT-23-5 package matches the footprint requirements of the target PCB design before ordering.

Supervisors Selection Notes

Select this part when a fixed 4.38 V threshold is required without adjustable resistors. Compare against other LP3470 variants with different threshold voltages if the system rail differs. Consider the absence of a watchdog timer if complex fault recovery is needed. Verify that the open-drain output interface is compatible with the downstream logic level requirements of the microcontroller or FPGA being supervised.

Supervisors Part Context

This component belongs to the LP3470 family of simple power-on reset circuits. The IM5X suffix denotes the specific SOT-23-5 package and tape-and-reel packaging configuration. The series is characterized by low quiescent current and small form factor, targeting portable electronics and industrial control systems where reliable power sequencing is critical.

Supervisors Replacement Considerations

Publicly confirmed substitutes include TPS389001DSER from Texas Instruments. Verify pin compatibility and threshold voltage accuracy when swapping between these specific supervisor ICs.