onsemi

MC7905CD2T

MC7905CD2T Description

The MC7905CD2T from onsemi is a fixed-output negative linear voltage regulator designed to deliver a stable -5V output with a 1A current capacity. Housed in a D2PAK (TO-263) surface-mount package, this obsolete but robust regulator features a low dropout voltage of 1.3V (typical at 1A) and operates across a wide temperature range of 0°C to 125°C. With a high PSRR of 70dB at 120Hz, it ensures excellent noise suppression, making it suitable for sensitive analog and digital circuits. The device includes over-current and over-temperature protection, enhancing reliability in demanding environments.

MC7905CD2T Features

• Fixed Negative Output: Delivers a precise -5V output, ideal for dual-supply systems.
• High Current Capacity: Supports 1A continuous output current.
• Low Dropout Voltage: 1.3V (typical) at full load, improving efficiency.
• Robust Protection: Integrated over-current and thermal shutdown safeguards.
• High PSRR: 70dB (120Hz) minimizes noise in power-sensitive applications.
• Wide Operating Temperature: Reliable performance from 0°C to 125°C.
• Surface-Mount Package: D2PAK (TO-263) for compact PCB designs.

MC7905CD2T Applications

The MC7905CD2T is well-suited for:

• Industrial Power Supplies: Stable negative rail generation for control systems.
• Audio Amplifiers: Low-noise voltage regulation in high-fidelity audio circuits.
• Test & Measurement Equipment: Precision power delivery for sensitive instrumentation.
• Automotive Electronics: Reliable operation under wide temperature fluctuations.
• Legacy Systems: Maintenance and repair of older electronics requiring -5V regulation.

Conclusion of MC7905CD2T

Though marked obsolete, the MC7905CD2T remains a dependable choice for applications requiring a high-current, negative-voltage regulator with robust protection and low noise. Its D2PAK package, wide temperature range, and high PSRR make it particularly valuable in industrial, automotive, and audio systems. Engineers seeking a proven -5V solution for legacy or noise-sensitive designs will find this regulator a practical option despite its discontinued status.