Texas Instruments

LP3875EMP-ADJ

LP3875EMP-ADJ Description

The LP3875EMP-ADJ from Texas Instruments is a high-performance, adjustable positive linear voltage regulator designed to deliver up to 1.5A of output current with an input voltage range up to 7V. This obsolete but reliable regulator features a low dropout voltage of 0.55V @ 1.5A, making it suitable for applications requiring stable power with minimal headroom. The output voltage is adjustable from 1.22V to 6.4V, providing flexibility for various low-voltage designs. With a quiescent current of 5 mA and a supply current of 15 mA (max), it balances efficiency and performance. The device includes enable control and robust protection features like over-current, over-temperature, and short-circuit protection, ensuring system reliability.

LP3875EMP-ADJ Features

• Adjustable Output: Wide output range (1.22V–6.4V) for versatile applications.
• High Current Capability: Supports up to 1.5A with low dropout (0.55V @ 1.5A).
• Excellent PSRR: 73dB to 57dB (120Hz) ensures noise suppression in sensitive circuits.
• Protection Mechanisms: Integrated safeguards against over-current, over-temperature, and short circuits.
• Enable Pin: Allows for power management via external control.
• Surface-Mount Package: SOT223-5 for compact PCB layouts.
• Low Quiescent Current: 5 mA minimizes power waste in standby modes.

LP3875EMP-ADJ Applications

• Portable Electronics: Ideal for battery-powered devices requiring stable, adjustable voltage.
• Embedded Systems: Suitable for microcontrollers, FPGAs, and sensors needing clean power.
• Industrial Controls: Robust protection features make it reliable for harsh environments.
• Automotive Accessories: Low dropout and high PSRR benefit noise-sensitive automotive electronics.
• Consumer Electronics: Used in set-top boxes, routers, and other low-voltage applications.

Conclusion of LP3875EMP-ADJ

The LP3875EMP-ADJ is a versatile, high-current linear regulator with adjustable output and robust protection features. While obsolete, its low dropout, high PSRR, and enable control make it a strong choice for designs requiring precision power management. Its SOT223-5 package ensures space efficiency, and its reliability suits demanding applications in industrial, automotive, and consumer electronics. Engineers seeking a balance of performance and protection in legacy designs will find this regulator a dependable solution.