Texas Instruments

LP2957ISX  

Linear & Switching Voltage Regulators

LP2957ISX Description

The LP2957ISX is a fixed output linear voltage regulator designed by Texas Instruments, offering a robust and efficient solution for applications requiring a stable 5V output with a maximum current of 250mA. This regulator is housed in a surface-mount DDPAK/TO263 package, making it suitable for compact and high-density designs. Despite being marked as obsolete, the LP2957ISX remains a reliable choice for legacy systems and specific applications where its unique features are advantageous.

LP2957ISX Features

• Output Type: Fixed at 5V, ensuring a stable and consistent power supply.
• Input Voltage Range: Capable of handling input voltages up to 30V, providing flexibility in power source selection.
• Output Current: Delivers a maximum output current of 250mA, suitable for a wide range of low-power applications.
• Low Dropout Voltage: With a maximum dropout voltage of 0.8V at 250mA, the LP2957ISX maintains high efficiency even at low input-to-output voltage differentials.
• Enable Control Feature: Includes an enable pin, allowing for dynamic control of the regulator’s operation, which can be useful for power-saving modes or controlled startup sequences.
• Protection Features: Equipped with over-current, over-temperature, and reverse polarity protection, ensuring reliable operation and safeguarding against common failure modes.
• Low Quiescent Current: Consumes only 200 µA in quiescent mode, minimizing power loss and extending battery life in portable applications.
• Moisture Sensitivity Level: MSL 3 (168 hours), suitable for standard manufacturing processes without requiring special handling.
• Mounting Type: Surface mount, ideal for automated assembly and high-density PCB layouts.
• Package Type: Tape & Reel (TR), facilitating efficient handling and placement during manufacturing.

LP2957ISX Applications

The LP2957ISX is well-suited for a variety of applications where a reliable and efficient 5V power supply is required. Specific use cases include:

• Consumer Electronics: Ideal for powering microcontrollers, sensors, and small peripherals in devices such as smartphones, tablets, and IoT devices.
• Industrial Control Systems: Provides stable power for control boards and PLCs, ensuring consistent operation in harsh industrial environments.
• Medical Devices: Suitable for low-power medical equipment where reliability and precision are paramount.
• Telecommunications: Powers low-power modules in communication infrastructure, such as base stations and network routers.

Conclusion of LP2957ISX

The LP2957ISX from Texas Instruments is a versatile and reliable linear voltage regulator, offering a fixed 5V output with a maximum current of 250mA. Its low dropout voltage, enable control feature, and comprehensive protection mechanisms make it a robust choice for a wide range of applications. Although marked as obsolete, the LP2957ISX remains a valuable component for legacy systems and specific applications where its unique features provide significant advantages. For engineers and designers seeking a dependable power solution, the LP2957ISX is a worthy consideration.

LP2957ISX Documents

Download datasheets and manufacturer documentation for LP2957ISX