INA381A4IDGSR

Current Regulation/Management Overview

The INA381A4IDGSR is a high-speed current sense amplifier manufactured by Texas Instruments, designed for precise current monitoring in power management systems. It features a fixed gain of 2 V/V and supports a wide common-mode voltage range from 0 V to 26 V, enabling both low-side and high-side sensing configurations. The device integrates an open-drain comparator with hysteresis for overcurrent protection applications. Operating on a single supply voltage between 2.7 V and 5.5 V, it draws a typical quiescent current of 250 µA. The component offers a bandwidth of 105 kHz and is housed in a compact 10-pin VSSOP package suitable for space-constrained designs.

Current Regulation/Management Feature Summary

• Integrated open-drain comparator with programmable hysteresis for fast overcurrent detection
• Wide common-mode voltage range supporting high-side and low-side current sensing
• Fixed 2 V/V gain ensures accurate signal amplification without external resistor networks
• Low quiescent current consumption optimizes efficiency in battery-powered applications

Current Regulation/Management Applications

• Overcurrent protection circuits in industrial power supplies
• Current monitoring in motor control systems
• Battery management systems requiring high-side sensing
• Point-of-load regulation feedback loops

Current Regulation/Management Procurement Notes

Verify the specific suffix IDGSR indicates tape-and-reel packaging when ordering. Confirm the A4 variant matches the required gain and comparator specifications for your design. Ensure compatibility with the 10-pin VSSOP footprint during PCB layout. Check for RoHS compliance documentation if required by your manufacturing standards. Validate that the 26 V maximum common-mode voltage aligns with your system's operating conditions.

Current Regulation/Management Selection Notes

Select this component when a fixed 2 V/V gain is sufficient for your signal conditioning needs. Consider the integrated comparator feature if discrete overcurrent protection circuitry can be eliminated. Evaluate the 105 kHz bandwidth against your switching frequency requirements to ensure adequate response time. Compare the 250 µA quiescent current against stricter low-power alternatives if energy efficiency is critical. Verify that the VSSOP-10 package fits within your available board space constraints.

Current Regulation/Management Part Context

The INA381 series represents Texas Instruments' solution for precision current sensing with integrated protection capabilities. This family combines amplifier and comparator functions into a single monolithic device, reducing component count and board area. The INA381A4 specifically targets applications requiring a fixed gain configuration, simplifying design implementation compared to adjustable gain variants. It serves as a key component in modern power distribution architectures where reliability and speed are paramount.

Current Regulation/Management Replacement Considerations

Direct replacements include other INA381 variants such as INA381A1IDGSR or INA381A2IDGSR, depending on the required gain setting. Ensure any substitute maintains the same 10-pin VSSOP package and pinout compatibility. Verify that alternative devices support the same 26 V common-mode voltage range and supply voltage specifications.