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MC7912ACD2TR4G

MC7912ACD2TR4G Description

The MC7912ACD2TR4G from onsemi is a fixed-output, negative-voltage linear regulator designed to deliver a stable -12V output at up to 1A of continuous current. Housed in a D2PAK (TO-263) surface-mount package, this obsolete but still relevant component offers robust performance with a typical dropout voltage of 1.3V @ 1A, ensuring efficient regulation even under high load conditions. It operates across a wide temperature range of 0°C to 125°C, making it suitable for demanding environments. With 61dB PSRR (120Hz), it effectively suppresses input ripple, while built-in over-current and over-temperature protection enhances reliability. Compliant with ROHS3 and REACH Unaffected, it meets modern environmental standards.

MC7912ACD2TR4G Features

• Fixed Negative Output: Delivers a precise -12V with ±4% tolerance.
• High Current Capability: Supports 1A output current with low dropout (1.3V typical).
• Excellent Ripple Rejection: 61dB PSRR at 120Hz minimizes noise in sensitive circuits.
• Robust Protection: Integrated over-current and over-temperature shutdown.
• Wide Operating Range: Functions reliably from 0°C to 125°C.
• Surface-Mount Design: D2PAK package optimizes thermal performance and PCB space.
• Compliance: ROHS3 Compliant and REACH Unaffected, ensuring environmental safety.

MC7912ACD2TR4G Applications

This regulator is ideal for applications requiring stable negative voltage rails, such as:

• Industrial Power Supplies: For control systems and instrumentation.
• Audio Amplifiers: Providing clean negative bias voltages.
• Test & Measurement Equipment: Ensuring precision in analog circuits.
• Automotive Electronics: Where wide-temperature operation is critical.
• Legacy Systems Maintenance: Due to its obsolete status, it’s often used in repairs or upgrades of older designs.

Conclusion of MC7912ACD2TR4G

The MC7912ACD2TR4G stands out for its high current capacity, low dropout, and excellent noise rejection, making it a reliable choice for negative voltage regulation. While marked as obsolete, its durability, thermal performance, and protection features ensure continued suitability for industrial, automotive, and audio applications. Engineers valuing ripple immunity and robustness in harsh conditions will find this regulator a dependable solution. For new designs, verifying alternative modern equivalents from onsemi is recommended.