Texas Instruments

LP38843S-1.2

LP38843S-1.2 Description

The LP38843S-1.2 is a high-performance linear voltage regulator from Texas Instruments, designed to provide a fixed output voltage of 1.2V with a maximum output current of 3A. This regulator is optimized for applications requiring a stable and efficient power supply, featuring a low dropout voltage of 0.5V at 3A, ensuring high efficiency even at low input-to-output voltage differentials. The LP38843S-1.2 is housed in a surface-mount DDPAK/TO263-5 package, making it suitable for compact and high-density PCB designs.

LP38843S-1.2 Features

• Fixed Output Voltage: The LP38843S-1.2 provides a fixed output voltage of 1.2V, ensuring consistent power delivery to sensitive electronic components.
• High Output Current: Capable of delivering up to 3A of output current, this regulator is ideal for applications requiring high power.
• Low Dropout Voltage: With a dropout voltage of only 0.5V at 3A, the LP38843S-1.2 maintains high efficiency even when the input voltage is close to the output voltage.
• Enable Control Feature: The regulator includes an enable pin, allowing for easy control of the output voltage, which is beneficial for power sequencing and system management.
• Protection Features: Over-current, over-temperature, and short-circuit protections robust ensureness and reliability, safeguarding the regulator and connected components from damage.
• Low Quiescent Current: A quiescent current of only 30 µA minimizes power consumption during standby conditions, making the LP38843S-1.2 suitable for battery-powered applications.
• High PSRR: The regulator offers a high power supply rejection ratio (PSRR) of 80dB at 120Hz and 65dB at 1kHz, effectively filtering out noise and ripple from the input supply.
• Moisture Sensitivity Level: MSL 3 (168 Hours) ensures the regulator is suitable for a wide range of manufacturing environments without compromising reliability.

LP38843S-1.2 Applications

The LP38843S-1.2 is ideal for a variety of applications where a stable and efficient power supply is crucial. Some specific use cases include:

• Consumer Electronics: Powering sensitive components in devices such as smartphones, tablets, and laptops.
• Industrial Equipment: Providing reliable power to sensors, controllers, and other critical components in industrial systems.
• Telecommunications: Ensuring stable power delivery to base stations, routers, and other networking equipment.
• Automotive Electronics: Suitable for in-vehicle infotainment systems, electronic control units (ECUs), and other automotive applications.
• Battery-Powered Devices: Ideal for applications where minimizing power consumption is essential, such as portable medical devices and handheld tools.

Conclusion of LP38843S-1.2

The LP38843S-1.2 from Texas Instruments is a versatile and high-performance linear voltage regulator, offering a fixed 1.2V output with a maximum current of 3A. Its low dropout voltage, enable control feature, and comprehensive protection mechanisms make it a reliable choice for a wide range of applications. Despite being marked as obsolete, the LP38843S-1.2 remains a valuable component for engineers and designers seeking a robust and efficient power solution.