MC34268DTRK

Overview

The MC34268DTRK is a low-dropout 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 490 mA. Packaged in an SOIC-8 surface-mount format, it supports operation from 0°C to +125°C.

Feature Summary

• Provides a fixed 2.85 V output specifically optimized for SCSI-5 active terminator circuits
• Capable of delivering up to 800 mA output current for high-drive requirements
• Operates with a wide input voltage range extending up to 15 V

Applications

• SCSI-5 active termination power supplies
• Low-dropout regulation for bus interface circuits
• Power management in SCSI controller boards

Procurement Notes

Verify the specific suffix DTRK against official datasheets to confirm tape-and-reel packaging and RoHS compliance status. Confirm availability as this component family has faced obsolescence notices. Ensure the source document explicitly lists the DTRK variant rather than generic MC34268D specifications.

Selection Notes

Select this component when a fixed 2.85 V rail is required for SCSI-5 termination. Verify that the 800 mA current rating meets the load requirements. Check thermal performance in the SOIC-8 package under expected ambient conditions. Compare line and load regulation specs if precision is critical for the termination circuit.

Part Context

This part belongs to the MC34268 series of low-dropout regulators. The series is characterized by its use in SCSI interface applications requiring stable low-voltage rails. The manufacturer offers various package options including tube and reel configurations for different production volumes.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.