LM3813M-1.0/NOPB

Current Regulation/Management Overview

The LM3813M-1.0/NOPB is a precision current gauge integrated circuit manufactured by Texas Instruments, housed in an 8-pin SOIC package. It features an ultra-low loss sense element for accurate current monitoring and provides a PWM output signal proportional to the sensed current. The device operates with a supply voltage range of 4V to 36V and supports input currents up to 2A. Designed for high accuracy, it offers a typical measurement error of 2% over the specified temperature range.

Current Regulation/Management Feature Summary

• Integrates an ultra-low loss sense element to minimize power dissipation during current monitoring
• Provides a pulse-width modulated (PWM) output signal directly proportional to the load current
• Delivers high measurement accuracy with low offset voltage characteristics

Current Regulation/Management Applications

• Battery management systems for cell balancing and state-of-charge estimation
• DC-DC converter current mode control loops
• Overcurrent protection circuits in power distribution units

Current Regulation/Management Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free and RoHS compliance status as per the manufacturer's latest documentation. Ensure the SOIC-8 package dimensions match your PCB footprint requirements. Confirm that the 2% accuracy specification meets your system tolerance needs under operating temperature conditions.

Current Regulation/Management Selection Notes

Select this component when precise current sensing with minimal voltage drop is required. The PWM output simplifies interface with microcontrollers or digital controllers without requiring external analog-to-digital conversion. Consider the 36V maximum supply voltage limit for high-side or low-side configurations.

Current Regulation/Management Part Context

This part belongs to the LM3813 family of precision current gauges from Texas Instruments. It is designed to replace discrete current sensing solutions, offering a compact alternative for applications requiring accurate current feedback in power management architectures.

Current Regulation/Management Replacement Considerations

Check for direct pin-compatible alternatives within the LM3813 series, such as different voltage reference variants. Verify functional equivalence regarding PWM output polarity and sense element resistance if substituting with other manufacturers' parts.