INA303A3IPWR

Current Regulation/Management Overview

The INA303A3IPWR is a high-side current monitor from Texas Instruments featuring an integrated precision reference and a fixed gain of 10 V/V. It provides a voltage output proportional to the current flowing through a shunt resistor, enabling accurate monitoring in power management systems. The device operates with a supply voltage range of 2.7 V to 5.5 V and supports common-mode voltages up to 80 V. It includes an open-drain alert output that triggers when the monitored current exceeds a user-defined threshold set by an external resistor. Packaged in a small SOT-23-5 form factor, it offers low quiescent current for energy-efficient designs.

Current Regulation/Management Feature Summary

• Integrated precision reference eliminates need for external voltage references
• Fixed 10 V/V gain ensures straightforward current-to-voltage conversion
• Open-drain alert output facilitates overcurrent protection logic integration

Current Regulation/Management Applications

• Battery management systems for portable electronics
• Power distribution units in industrial equipment
• Overcurrent protection circuits in consumer appliances

Current Regulation/Management Procurement Notes

Verify the specific suffix 'A3' indicates the fixed threshold voltage configuration during procurement. Confirm the 'PWR' package code corresponds to the SOT-23-5 variant required for your PCB layout. Ensure compatibility with your system's common-mode voltage limits before finalizing orders. Check for RoHS compliance status if required by your manufacturing standards.

Current Regulation/Management Selection Notes

Select this component when a fixed threshold trip point is sufficient for your application requirements. Consider the 10 V/V gain against your available ADC input range and desired resolution. Evaluate the SOT-23-5 package size constraints against your board space limitations. Verify that the 80 V common-mode range meets your highest potential circuit voltage.

Current Regulation/Management Part Context

This part belongs to the INA303 family of high-side current monitors designed for cost-sensitive applications requiring basic overcurrent detection. Unlike programmable variants, the A3 suffix denotes a specific internal threshold setting, simplifying design implementation. It serves as a direct replacement for discrete comparator-based solutions, offering improved accuracy and reduced component count in standard power monitoring tasks.

Current Regulation/Management Replacement Considerations

Direct substitutes include other INA303 variants with different threshold settings (e.g., INA303A1, INA303A2) if the trip point needs adjustment. For pin-compatible alternatives with different gain or package options, consult the manufacturer's cross-reference guide. Ensure any replacement maintains the same supply voltage range and common-mode voltage capabilities.