LP3470IM5-4.38/NOPB

Supervisors Overview

The LP3470IM5-4.38/NOPB is a voltage supervisory circuit manufactured by Texas Instruments, designed to monitor 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 4.38 V. The device operates within a maximum supply voltage of 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 industrial temperature ranges from -40°C to +85°C.

Supervisors Feature Summary

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

Supervisors Applications

• Monitoring microprocessor and microcontroller power rails
• Ensuring system stability in embedded control units
• Protecting data integrity during power-down events

Supervisors Procurement Notes

Verify the exact suffix configuration against the manufacturer's current datasheet, as ordering codes may include specific packaging or tape-and-reel variations. Confirm RoHS compliance status and lead times directly with authorized distributors, as availability for this specific threshold variant may vary. Ensure the selected component matches the required thermal and electrical specifications for the target application environment.

Supervisors Selection Notes

Select this component when a fixed 4.38 V threshold is required for single-input voltage monitoring. The SOT-23-5 package offers space efficiency for dense PCB layouts. Consider the 2 ms minimum reset delay and external capacitor requirements for timing constraints. Verify that the open-drain output compatibility aligns with the downstream logic interface voltage levels.

Supervisors Part Context

This part belongs to the LP3470 family of ultra-low-power voltage supervisors from Texas Instruments. The series provides various fixed threshold voltages to accommodate different standard power rails. The 'I' designation indicates an extended industrial temperature range compared to commercial variants. The 'M5' suffix specifies the five-pin SOT-23 package format used for surface-mount assembly.

Supervisors Replacement Considerations

LP3470A308DBVR is listed as a compatible alternative within the same product family, offering similar functionality with different threshold options. Verify pinout compatibility and electrical parameter alignment before substitution.