LM3813MX-7.0

Current Regulation/Management Overview

The LM3813MX-7.0 is a precision current gauge integrated circuit manufactured by Texas Instruments, housed in an 8-pin SOIC narrow package. It features an ultra-low loss sense element designed for low-side sensing applications. The device provides a pulse-width modulation (PWM) output to indicate current levels. Key electrical parameters include an input voltage range of 2V to 12V and a current measurement accuracy of 4%. The component operates within a temperature range of 0°C to 70°C.

Current Regulation/Management Feature Summary

• Integrates an ultra-low loss sense element for high-efficiency current monitoring
• Provides a PWM output signal proportional to the sensed current
• Designed specifically for low-side current sensing configurations

Current Regulation/Management Applications

• Battery management systems requiring precise current monitoring
• Low-side current sensing in power supply circuits
• Industrial control systems with current protection requirements

Current Regulation/Management Procurement Notes

Verify the specific suffix '7.0' against the official datasheet to ensure correct accuracy class and pinout compatibility. Confirm that the 8-pin SOIC narrow package matches your PCB footprint. Check for RoHS compliance status if required by your manufacturing standards. Ensure the operating temperature range meets your environmental specifications.

Current Regulation/Management Selection Notes

Select this component when low-side sensing is required with minimal voltage drop across the sense element. The PWM output is suitable for microcontroller interfaces without needing an ADC. Consider the 4% accuracy specification against your system tolerance requirements. Verify that the 2V to 12V input range covers your application's operational voltage window.

Current Regulation/Management Part Context

The LM3813 belongs to the LM381 series of precision current gauge ICs from Texas Instruments and formerly National Semiconductor. This family focuses on accurate current monitoring using internal sense elements rather than external shunts. The MX variant denotes the tape-and-reel packaging format, while the M variant indicates tube packaging. Both share identical electrical characteristics and functionality.

Current Regulation/Management Replacement Considerations

The LM3813M-7.0/NOPB is a direct equivalent with identical electrical specifications and pinout. Verify package compatibility between SOIC narrow and other variants. No functional differences exist between the MX and M suffixes regarding performance.