onsemi

KA78RM33TU

KA78RM33TU Description

The KA78RM33TU is a linear regulator IC designed by onsemi, offering a fixed output voltage of 3.3V with a maximum output current of 500mA. This device is housed in a TO220-3 package, making it suitable for through-hole mounting. Despite being marked as obsolete, the KA78RM33TU remains a reliable choice for applications requiring a stable power supply with a fixed output configuration. The regulator features a maximum input voltage of 20V and a dropout voltage of 0.6V at 500mA, ensuring efficient operation even under varying input conditions. It also includes overcurrent, overtemperature, and short-circuit protection features, enhancing its reliability and safety in diverse environments.

KA78RM33TU Features

• Output Type: Fixed, providing a stable 3.3V output.
• Input Voltage Range: Up to 20V, making it versatile for a wide range of input sources.
• Output Current: Capable of delivering up to 500mA, suitable for moderate power applications.
• Number of Regulators: Single regulator design, simplifying integration into existing systems.
• Output Configuration: Positive output, ideal for standard power supply requirements.
• Supply Current: Maximum of 10mA, ensuring low power consumption.
• Dropout Voltage: Maximum of 0.6V at 500mA, enhancing efficiency at high load currents.
• Quiescent Current: 5mA, contributing to overall energy efficiency.
• Power Supply Rejection Ratio (PSRR): 55dB at 120Hz, providing excellent noise rejection.
• Moisture Sensitivity Level (MSL): Level 1 (Unlimited), suitable for storage and handling in various environments.
• Package: TO220-3 tube packaging, ideal for through-hole mounting and easy integration.
• Protection Features: Overcurrent, overtemperature, and short-circuit protection, ensuring robustness and reliability.

KA78RM33TU Applications

The KA78RM33TU is well-suited for a variety of applications where a stable and reliable power supply is required. Its fixed 3.3V output and moderate current capacity make it ideal for powering microcontrollers, embedded systems, and digital circuits. The low dropout voltage and high PSRR ensure that the regulator can maintain stable output even under varying input conditions, making it suitable for battery-powered devices and systems with fluctuating input voltages. The protection features further enhance its reliability, making it a robust choice for industrial and consumer electronics applications.

Conclusion of KA78RM33TU

The KA78RM33TU from onsemi is a versatile linear regulator IC that offers a reliable and stable power supply solution. Its fixed 3.3V output and 500mA current capacity make it suitable for a wide range of applications, from microcontroller power supplies to digital circuitry. The inclusion of overcurrent, overtemperature, and short-circuit protection features ensures robustness and reliability, making it a dependable choice for various electronic systems. Despite being marked as obsolete, the KA78RM33TU remains a valuable component for engineers and designers seeking a stable and efficient power management solution.