The SPX1582T5-3.3/TR is a 3A low dropout (LDO) linear regulator manufactured by Sipex Corporation (later acquired by Exar, and then acquired by MaxLinear). This regulator is designed to provide a stable and accurate 3.3V output voltage from a higher input voltage, while maintaining low dropout voltage. It is commonly used in applications requiring regulated power supplies, such as microprocessor systems, battery-powered devices, and portable electronics.

Applications

• Microprocessor Power Supplies: Used to provide a stable 3.3V supply for microprocessors and microcontrollers.
• Battery-Powered Devices: Employed in portable devices to regulate the voltage from batteries.
• Post Regulation for Switching Supplies: Utilized as a post regulator to improve the output voltage accuracy and ripple of switching power supplies.
• Linear Power Supplies: Used in linear power supplies to provide a stable and regulated output voltage.
• Notebook Computers: Integrated into notebook computers for voltage regulation of various components.

Features

• Low Dropout Voltage: Maintains a stable output voltage even with a small difference between input and output voltages.
• High Output Current: Delivers up to 3A of output current.
• Over Current and Over Temperature Protection: Provides protection against overloads and thermal damage.
• Stable with Ceramic Capacitors: Designed to be stable with low-ESR ceramic output capacitors.
• Fixed Output Voltage: Provides a fixed 3.3V output voltage.

Benefits

• Improved System Performance: Ensures a stable and accurate supply voltage for sensitive components.
• Extended Battery Life: Reduces power losses, increasing operating time in portable devices.
• Simplified Circuit Design: Easy to integrate into existing circuits with minimal modifications.
• Enhanced Reliability: Provides protection against overloads and thermal damage.
• Reduced Component Count: Requires minimal external components for operation.

Additional Details

The SPX1582T5-3.3/TR operates with an input voltage typically ranging from 4.75V to 16V. It is available in a TO-263 package, which provides good thermal dissipation. The regulator features internal current limiting and thermal shutdown protection, protecting it from damage due to overloads and over-temperature conditions. The SPX1582 is designed to be stable with low-ESR ceramic output capacitors, which are commonly used in modern electronic devices. It is often used in applications where a stable and reliable 3.3V supply is required, and where minimizing dropout voltage is important. The device's performance is characterized by its low dropout voltage, high output current capability, and robust protection features. The /TR suffix indicates that the device is tape and reel packaged for automated assembly.