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PQ1R38

PQ1R38 Description

The PQ1R38 is a linear voltage regulator designed by Sharp Microelectronics, featuring a fixed output voltage of 3.8V and a maximum output current of 150mA. This regulator is housed in a compact SOT23L- package6, making it suitable for surface mount applications. Despite its small form factor, the PQ1R38 offers robust performance with a maximum input voltage of 16V and a dropout voltage of only 0.4V at 150mA. The regulator is equipped with an enable control feature, allowing for precise power management. Additionally, it includes over-current and over-temperature protection features to ensure reliability and safety in various operating conditions. Although the PQ1R38 is now considered obsolete, it remains a viable option for legacy systems and specific applications where its unique specifications are required.

PQ1R38 Features

• Fixed Output Voltage: The PQ1R38 provides a stable 3.8V output, ensuring consistent power supply for sensitive electronic components.
• High Input Voltage Range: With a maximum input voltage of 16V, the regulator can handle a wide range of input voltages, making it versatile for various power sources.
• Low Dropout Voltage: The 0.4V dropout voltage at 150mA ensures high efficiency, especially in applications where the input voltage is close to the output voltage.
• Enable Control Feature: The enable pin allows for dynamic control of the regulator's operation, enabling power-saving modes and precise management of power states.
• Protection Features: Over-current and over-temperature protection mechanisms safeguard the regulator and connected components from damage, enhancing reliability.
• Compact Packaging: The SOT23L-6 package is ideal for surface mount applications, conserving board space and facilitating integration into compact designs.
• Low Quiescent Current: The 350 µA quiescent current minimizes power consumption in standby modes, contributing to energy efficiency.
• High PSRR: The 55dB power supply rejection ratio at 400Hz ensures that the regulator can effectively filter out noise from the power supply, maintaining a clean output voltage.

PQ1R38 Applications

The PQ1R38 is well-suited for a variety of applications where a stable 3.8V supply and efficient power management are critical. Some specific use cases include:

• Embedded Systems: Ideal for microcontrollers and other embedded devices that require a stable 3.8V supply and low power consumption.
• Battery-Powered Devices: The low dropout voltage and high efficiency make it suitable for applications where the input voltage may vary, such as in battery-powered systems.
• Industrial Control: The compact size and robust protection features make it a reliable choice for industrial applications where space is limited and reliability is paramount.
• Consumer Electronics: Suitable for portable devices and consumer electronics that require a stable power supply and efficient power management.

Conclusion of PQ1R38

The PQ1R38 linear voltage regulator from Sharp Microelectronics offers a unique combination of high efficiency, compact size, and robust protection features. Its fixed 3.8V output and low dropout voltage make it an excellent choice for applications requiring a stable power supply. Despite being obsolete, the PQ1R38 remains a valuable component for legacy systems and specific applications where its specifications are ideal. Its enable control feature and low quiescent current further enhance its versatility and efficiency, making it a reliable option for a range of electronic devices.