Sharp Microelectronics Tariff Inquiry

PQ12RD21

PQ12RD21 Description

The PQ12RD21 is a linear regulator IC designed by Sharp Microelectronics, offering a fixed output voltage of 12V and a maximum output current of 2A. This regulator is housed in a TO220-4 package, making it suitable for through-hole mounting. Despite its obsolete status, the PQ12RD21 remains a reliable choice for applications requiring a stable 12V supply. With a maximum input voltage of 20V and a dropout voltage of 0.5V at 2A, this regulator ensures efficient power delivery even under varying input conditions. The device features an enable control function, allowing for dynamic power management, and includes over-current and over-temperature protection to safeguard against potential faults. The PQ12RD21 also boasts a quiescent current of 10 mA and a power supply rejection ratio (PSRR) of 55dB at 120Hz, ensuring minimal noise and high performance in sensitive applications.

PQ12RD21 Features

• Fixed Output Voltage: Provides a stable 12V output, ensuring consistent power supply for connected devices.
• High Output Current: Capable of delivering up to 2A, making it suitable for applications with moderate to high current requirements.
• Low Dropout Voltage: With a maximum dropout voltage of 0.5V at 2A, the PQ12RD21 maintains high efficiency even when the input voltage is close to the output voltage.
• Enable Control: Features an enable pin, allowing for dynamic control of the regulator's operation, which can be useful in power-saving or sequencing applications.
• Protection Features: Includes over-current and over-temperature protection, ensuring the device's longevity and reliability.
• Low Quiescent Current: Consumes only 10 mA in quiescent mode, minimizing power loss and enhancing overall system efficiency.
• High PSRR: Achieves a power supply rejection ratio of 55dB at 120Hz, reducing the impact of input voltage fluctuations on the output voltage.
• Through-Hole Mounting: Utilizes a TO220-4 package, facilitating easy integration into various circuit boards and designs.

PQ12RD21 Applications

The PQ12RD21 is ideal for a variety of applications where a stable and reliable 12V power supply is required. Its high output current and low dropout voltage make it particularly suitable for:

• Industrial Control Systems: Providing stable power to sensors, actuators, and control modules.
• Telecommunications Equipment: Supplying power to communication interfaces and peripheral devices.
• Consumer Electronics: Used in devices such as routers, modems, and set-top boxes where a reliable power source is crucial.
• Automotive Applications: Suitable for powering electronic control units (ECUs) and other automotive electronics.
• Medical Devices: Ensuring stable power supply for critical medical equipment and monitoring devices.

Conclusion of PQ12RD21

The PQ12RD21, despite being marked as obsolete, remains a robust and reliable linear regulator for applications requiring a stable 12V supply. Its low dropout voltage, high PSRR, and protection features make it a standout choice in its category. The enable control function and low quiescent current further enhance its versatility and efficiency. While newer models may offer additional features, the PQ12RD21 continues to provide excellent performance and reliability, making it a trusted component in various power management applications.