onsemi

MC33269DT-012G

MC33269DT-012G Description

The MC33269DT-012G from onsemi is a fixed-output linear voltage regulator designed to deliver a stable 12V output with a maximum current capacity of 800mA. Operating within an input voltage range up to 20V, this regulator features a low dropout voltage of 1.35V @ 800mA, making it suitable for applications requiring efficient power conversion with minimal voltage headroom. Housed in a DPAK (TO-252) surface-mount package, it is optimized for compact PCB designs. Although marked as obsolete, it remains a reliable choice for legacy systems due to its robust performance and compliance with ROHS3 and REACH environmental standards.

MC33269DT-012G Features

• High Precision: Fixed 12V output with tight voltage regulation.
• Low Dropout: 1.35V dropout at full load (800mA), enhancing efficiency in low-headroom scenarios.
• Robust Protection: Integrated over-temperature and short-circuit protection for enhanced reliability.
• Low Noise: 55dB PSRR (120Hz) ensures clean output, critical for noise-sensitive analog circuits.
• Wide Input Range: Supports up to 20V input, accommodating varied power sources.
• DPAK Package: Thermally efficient surface-mount design for high-current applications.

MC33269DT-012G Applications

• Industrial Control Systems: Powering sensors, actuators, and control logic where stable 12V rails are required.
• Automotive Electronics: Suitable for infotainment systems and dashboard modules (non-safety-critical).
• Legacy Equipment: Maintenance and repair of older systems needing drop-in replacements.
• Consumer Electronics: Audio amplifiers, set-top boxes, and other medium-power devices.
• Embedded Systems: Reliable voltage regulation for microcontrollers and peripheral circuits.

Conclusion of MC33269DT-012G

The MC33269DT-012G excels in delivering stable, low-noise 12V power with robust protection features, making it ideal for industrial, automotive, and legacy applications. While obsolete, its high PSRR, low dropout, and DPAK thermal performance offer advantages over generic regulators. Engineers seeking a proven, compliant solution for moderate-current 12V systems will find this regulator a dependable choice, particularly in space-constrained or noise-sensitive designs.

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