onsemi

MC78PC33NTRG

MC78PC33NTRG Description

The MC78PC33NTRG from onsemi is a fixed-output linear voltage regulator designed to deliver a stable 3.3V output with a maximum input voltage of 8V and an output current capability of 150mA. Packaged in a compact 5TSOP surface-mount form factor, this regulator is optimized for space-constrained applications. It features a low dropout voltage of 0.3V @ 100mA, ensuring efficient operation even with minimal headroom. The device includes enable control for power management and over-current protection for enhanced reliability. Although marked as obsolete, it remains a viable choice for legacy designs requiring a robust, low-noise power solution.

MC78PC33NTRG Features

• High PSRR (70dB @ 1kHz): Excellent noise suppression for sensitive analog/digital circuits.
• Low Dropout Voltage (0.3V @ 100mA): Ideal for battery-powered or low-input-voltage scenarios.
• Enable Pin: Allows dynamic power control, reducing standby current.
• Over-Current Protection: Safeguards against load faults.
• Surface-Mount (5TSOP): Saves PCB space in compact designs.
• Wide Input Range (Up to 8V): Compatible with various power sources.
• Fixed 3.3V Output: Eliminates the need for external feedback components.

MC78PC33NTRG Applications

This regulator is well-suited for:

• Portable Electronics: Such as handheld devices, sensors, and IoT modules, where low dropout and efficiency are critical.
• Embedded Systems: Microcontroller power supplies in industrial or consumer applications.
• Noise-Sensitive Circuits: Audio/video equipment, ADCs, and RF systems benefiting from high PSRR.
• Legacy Designs: Replacing older 3.3V regulators with similar footprints.

Conclusion of MC78PC33NTRG

The MC78PC33NTRG offers a balance of performance, size, and reliability, making it a pragmatic choice for 3.3V regulation in low-power systems. Its enable feature and protection mechanisms provide added flexibility and robustness, while the high PSRR ensures clean power delivery. Though obsolete, it remains relevant for specific use cases requiring its unique combination of attributes. Designers should evaluate alternatives for new projects but can leverage this IC for maintenance or cost-sensitive upgrades.