MC34268DR2

Overview

The MC34268DR2G is a low-dropout linear voltage regulator manufactured by onsemi, designed for SCSI-5 active termination applications. It provides a fixed output voltage of 2.85 V with a maximum output current capability of 800 mA. The device operates within an input voltage range of 4.25 V to 15 V and features a typical dropout voltage of 950 mV at rated load. It is housed in an SOIC-8 surface-mount package and supports operation across a temperature range of 0°C to +125°C. The regulator includes line regulation of 0.3% and load regulation of 0.5%, ensuring stable performance under varying conditions.

Feature Summary

• Provides a fixed 2.85 V output specifically optimized for SCSI-5 active terminator circuits
• Delivers up to 800 mA output current with low dropout characteristics for efficient power management
• Operates reliably over an extended industrial temperature range from 0°C to +125°C

Applications

• SCSI-5 active terminator circuits
• Low-voltage power supply regulation
• Industrial control systems requiring stable 2.85 V rails

Procurement Notes

Verify the exact suffix (e.g., DR2G vs DG) against the manufacturer's official datasheet to ensure correct packaging and RoHS compliance status. Confirm availability as some variants may be subject to end-of-life notices or production changes. Cross-reference the part number with authorized distributors to validate authenticity and check for any recent product change notifications that might affect form, fit, or function.

Selection Notes

Select this component when a fixed 2.85 V output is required for SCSI-5 active termination. Ensure the input voltage remains between 4.25 V and 15 V to maintain proper regulation. Consider the 800 mA current limit and thermal dissipation capabilities in the SOIC-8 package. Verify that the operating temperature range meets the environmental requirements of the target application.

Part Context

The MC34268 series belongs to onsemi's portfolio of specialized low-dropout regulators. This specific variant is tailored for SCSI interface standards, providing precise voltage regulation for terminator loads. It complements other PMIC offerings by addressing niche requirements in storage and peripheral interfaces where stable, low-noise power is critical for signal integrity.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer's cross-reference tool for potential alternatives if this specific suffix is unavailable.