onsemi

KA78RM33RTF

KA78RM33RTF Description

The KA78RM33RTF is a linear regulator designed for applications requiring a stable 3.3V output voltage with a maximum output current of 500mA. Manufactured by onsemi, this device is housed in a DPAK package, making it suitable for surface-mount applications. Despite its obsolescence status, the KA78RM33RTF remains a reliable choice for power management in various electronic systems.

KA78RM33RTF Features

• Output Type: Fixed
• Input Voltage Range: Up to 20V
• Output Voltage: Fixed at 3.3V
• Output Current: 500mA
• Dropout Voltage: Maximum of 0.6V at 500mA, ensuring efficient operation even at low input-to-output voltage differentials.
• Supply Current: Maximum of 10mA, with a quiescent current of 5mA, contributing to low power consumption.
• Power Supply Rejection Ratio (PSRR): 55dB at 120Hz, providing excellent noise rejection and stable output voltage.
• Protection Features: Over-current, over-temperature, and short-circuit protection, enhancing reliability and durability.
• Moisture Sensitivity Level (MSL): Level 1 (Unlimited), suitable for a wide range of environmental conditions.
• Package: DPAK, with a tape & reel (TR) packaging option for convenient handling and assembly.
• Compliance: REACH Unaffected, ensuring compliance with environmental regulations.

KA78RM33RTF Applications

The KA78RM33RTF is ideal for applications where a stable and reliable power supply is critical. Its fixed 3.3V output and 500mA current capacity make it suitable for:

• Embedded Systems: Providing a stable power source for microcontrollers and other low-power components.
• Consumer Electronics: Powering devices such as smartphones, tablets, and other portable electronics.
• Industrial Equipment: Ensuring reliable power management in control systems and sensors.
• Telecommunications: Supplying power to low-power modules in communication infrastructure.

Conclusion of KA78RM33RTF

The KA78RM33RTF is a robust linear regulator that offers a stable 3.3V output with a maximum current of 500mA. Its low dropout voltage, high PSRR, and comprehensive protection features make it a reliable choice for a variety of applications. Despite being marked as obsolete, its performance and features continue to meet the demands of modern electronics. For designers and engineers looking for a dependable power management solution, the KA78RM33RTF remains a viable option, especially in applications requiring a fixed 3.3V output.