Texas Instruments

LP38690DTX-3.3  

Linear & Switching Voltage Regulators

LP38690DTX-3.3 Description

The LP38690DTX-3.3 is a linear voltage regulator designed by Texas Instruments, offering a fixed output voltage of 3.3V and capable of delivering up to 1A of output current. This regulator is designed for surface mount applications and is housed in a TO252-3 package. Despite being marked as obsolete, the LP38690DTX-3.3 remains a reliable choice for power management in various electronic systems.

LP38690DTX-3.3 Features

• Fixed Output Voltage: The LP38690DTX-3.3 provides a stable 3.3V output, making it suitable for applications requiring a consistent power supply.
• High Input Voltage Range: With a maximum input voltage of 10V, this regulator can handle a wide range of input voltages, ensuring flexibility in power supply design.
• Low Dropout Voltage: The maximum dropout voltage is 1V at 1A, allowing the regulator to maintain efficiency even when the input voltage is close to the output voltage.
• Low Quiescent Current: At 55 µA, the quiescent current is minimal, contributing to high efficiency and reduced power consumption.
• Over-Temperature Protection: This feature ensures the regulator operates within safe temperature limits, enhancing reliability and longevity.
• High Power Supply Rejection Ratio (PSRR): With a PSRR of 55dB at 120Hz, the regulator effectively filters out noise from the power supply, ensuring clean output voltage.
• Moisture Sensitivity Level (MSL) 1: The regulator is classified as MSL 1, indicating it is suitable for unlimited exposure to moisture, making it ideal for various environmental conditions.
• Surface Mount Packaging: The TO252-3 package is designed for surface mount technology, facilitating easy integration into modern PCB designs.

LP38690DTX-3.3 Applications

The LP38690DTX-3.3 is ideal for a variety of applications where a stable 3.3V power supply is required. Some specific use cases include:

• Embedded Systems: Providing a reliable power source for microcontrollers, sensors, and other low-power devices.
• Communication Equipment: Ensuring stable power for RF modules, transceivers, and other communication components.
• Consumer Electronics: Suitable for powering devices such as smartphones, tablets, and other portable electronics.
• Industrial Control Systems: Ideal for powering control boards, PLCs, and other industrial automation components.
• Medical Devices: Providing a stable power supply for medical monitoring equipment and diagnostic devices.

Conclusion of LP38690DTX-3.3

The LP38690DTX-3.3 from Texas Instruments is a robust linear voltage regulator with a fixed 3.3V output and 1A current capability. Its low dropout voltage, high PSRR, and over-temperature protection make it a reliable choice for a wide range of applications. Despite its obsolete status, the regulator's performance and features continue to make it a viable option for power management in various electronic systems.

LP38690DTX-3.3 Documents

Download datasheets and manufacturer documentation for LP38690DTX-3.3

Datasheets :

LP38690, LP38692 Datasheet      

Design Resources :

LP38690 Design with WEBENCH® Power Designer      

HTML Datasheet :

LP38690, LP38692 Datasheet      

PCN Design/Specification :

Data Sheet Chg 3/Feb/2016