Texas Instruments

TPS78633KTTT

TPS78633KTTT Description

The TPS78633KTTT from Texas Instruments is a high-performance, fixed-output 3.3V, 1.5A low-dropout (LDO) linear voltage regulator designed for precision power management in demanding applications. Housed in a DDPAK (TO-263) package, this regulator delivers stable output with a low dropout voltage of 0.51V at 1.5A, making it ideal for systems with tight voltage margins. Despite its obsolete status, it remains a robust choice for legacy designs due to its high PSRR (59dB at 100Hz) and low quiescent current (385 µA), ensuring efficient operation in noise-sensitive environments.

TPS78633KTTT Features

• High Current Output: Supports 1.5A continuous load current, suitable for powering processors, FPGAs, and other high-current peripherals.
• Low Dropout Voltage: 0.51V at 1.5A minimizes power loss, enhancing efficiency in battery-operated systems.
• Excellent Noise Rejection: PSRR of 59dB (100Hz) ensures clean output in RF and analog circuits.
• Advanced Protection: Includes over-current, over-temperature, reverse polarity, and UVLO safeguards for robust system reliability.
• Enable Control: Features an enable pin for power sequencing and low-power modes.
• RoHS3 Compliant & REACH Unaffected: Meets environmental standards for global deployment.

TPS78633KTTT Applications

• Industrial Automation: Powers sensors, PLCs, and control systems requiring stable 3.3V rails.
• Telecommunications: Ideal for baseband processing and RF modules due to high PSRR.
• Embedded Systems: Suitable for FPGA/ASIC power supplies where low noise and high current are critical.
• Legacy Designs: Despite obsolescence, it remains a reliable choice for maintenance and repair of older electronics.

Conclusion of TPS78633KTTT

The TPS78633KTTT excels in delivering high-current, low-noise power with robust protection features, making it a standout choice for industrial, telecom, and embedded applications. While obsolete, its performance metrics—such as low dropout and high PSRR—ensure continued relevance in legacy systems. Engineers seeking a 3.3V LDO with 1.5A capability and superior noise immunity should consider this regulator for critical power delivery tasks.