Texas Instruments

LP38691SD-1.8  

Linear & Switching Voltage Regulators

LP38691SD-1.8 Description

The LP38691SD-1.8 is a high-performance linear regulator designed by Texas Instruments, specifically tailored for automotive applications. This IC offers a fixed output voltage of 1.8V and is capable of delivering a maximum output current of 500mA. It is designed to operate with a maximum input voltage of 10V, making it suitable for a wide range of power supply requirements. The regulator features a low quiescent current of 55 µA, ensuring high efficiency even under light load conditions. Additionally, it has a maximum supply current of 100 µA, which is crucial for maintaining low power consumption.

The LP38691SD-1.8 is housed in a 6-lead WSON package, which is ideal for surface-mount applications. This package type ensures robust mechanical stability and thermal performance, making it suitable for demanding automotive environments. The regulator also includes over-temperature protection, safeguarding the device and connected circuits from thermal damage.

LP38691SD-1.8 Features

• Fixed Output Voltage: The LP38691SD-1.8 provides a stable 1.8V output voltage, ensuring consistent power delivery to sensitive automotive electronics.
• High Output Current: Capable of delivering up to 500mA, this regulator can support a variety of high-current applications without compromising performance.
• Low Quiescent Current: With a quiescent current of only 55 µA, the LP38691SD-1.8 minimizes power loss, making it highly efficient even at low load levels.
• Over-Temperature Protection: This feature ensures the regulator operates within safe temperature limits, preventing thermal runaway and extending the device's lifespan.
• Automotive Grade: Certified for automotive use, the LP38691SD-1.8 meets the stringent reliability and performance standards required for automotive applications.
• Moisture Sensitivity Level 1: The device is rated for unlimited exposure to moisture, making it suitable for high-humidity environments.
• High Power Supply Rejection Ratio (PSRR): At 55dB (120Hz), the LP38691SD-1.8 effectively filters out noise from the input power supply, ensuring clean output voltage.

LP38691SD-1.8 Applications

The LP38691SD-1.8 is ideally suited for automotive applications where a reliable and efficient power supply is critical. Some specific use cases include:

• Automotive Electronics: Ideal for powering sensitive automotive systems such as infotainment systems, advanced driver-assistance systems (ADAS), and electronic control units (ECUs).
• Industrial Applications: Suitable for industrial control systems and IoT devices that require a stable and efficient power supply.
• Consumer Electronics: Can be used in high-end consumer electronics where a fixed output voltage and high current capability are required.

Conclusion of LP38691SD-1.8

The LP38691SD-1.8 from Texas Instruments is a robust and efficient linear regulator designed to meet the demanding requirements of automotive and industrial applications. Its low quiescent current, high output current capability, and over-temperature protection make it a reliable choice for power management. Despite being marked as obsolete, the LP38691SD-1.8 remains a viable option for applications where its unique features and performance benefits are required. For designers seeking a high-performance, automotive-grade regulator, the LP38691SD-1.8 is a compelling choice.

LP38691SD-1.8 Documents

Download datasheets and manufacturer documentation for LP38691SD-1.8

Datasheets :

LP38691(-Q1),LP38693(-Q)      

Design Resources :

LP38691 Design with WEBENCH® Power Designer      

PCN Design/Specification :

Data Sheet Chg 3/Feb/2016       Wire Base Metal 05/Oct/2016