LM3813MX-1.0

Current Regulation/Management Overview

The LM3813MX-1.0 is a precision current gauge integrated circuit manufactured by Texas Instruments, originally developed under the National Semiconductor brand. It is housed in an 8-pin SOIC narrow package and operates within an input voltage range of 8.2 V to 12 V, with a nominal input of 10 V. The device utilizes a fixed-frequency design to ensure consistent performance for low-side sensing applications. It integrates an ultra-low loss sense element and provides a pulse width modulation (PWM) output. The component is lead-free, RoHS compliant, and classified as an analog switching controller.

Current Regulation/Management Feature Summary

• Integrates an ultra-low loss sense element for high-precision current measurement
• Provides a pulse width modulation (PWM) output signal
• Utilizes a fixed-frequency design architecture for stable operation

Current Regulation/Management Applications

• Low-side current sensing in power supply circuits
• Precision current monitoring in embedded systems
• Power management support circuits requiring accurate current gauging

Current Regulation/Management Procurement Notes

Verify the manufacturer origin, as this part was originally produced by National Semiconductor before its acquisition by Texas Instruments. Confirm the specific suffix '1.0' matches the required precision and timing specifications. Ensure the 8-pin SOIC narrow package format aligns with your PCB layout requirements. Check for lead-free and RoHS compliance status if environmental regulations apply to your deployment.

Current Regulation/Management Selection Notes

Select this component when precise low-side current measurement is required using a PWM output interface. It is suitable for designs needing a fixed-frequency control scheme with minimal sense element loss. Consider the 8.2 V to 12 V input voltage range during system power budgeting. This IC is appropriate for applications where compact 8-pin packaging is preferred over larger packages.

Current Regulation/Management Part Context

The LM3813 belongs to the LM381 series of precision current gauge ICs. It shares functional similarities with other members like the LM3812 and LM3813MX-7.0, differing primarily in specific timing or precision characteristics indicated by the suffix. The MX-1.0 variant specifically denotes the 8-pin SOIC package configuration and its associated electrical parameters within the broader family.

Current Regulation/Management Replacement Considerations

The LM3813MX-7.0 is a documented alternative within the same series, offering similar precision current gauge functionality. Verify that the specific timing or precision differences between the '-1.0' and '-7.0' suffixes meet your application requirements before substitution.