The SPX2945T-5.0 is a 500mA low dropout regulator (LDO) from Sipex Corporation (later acquired by Exar Corporation). It is designed to provide a stable and accurate 5.0V output voltage with a low dropout voltage, making it suitable for battery-powered and portable applications. Its features include excellent transient response and thermal shutdown protection.

Applications:

• Battery-powered systems
• Portable computers
• Cellular phones
• PDAs
• Post regulators for switching supplies

Features:

• Low dropout voltage
• 500mA output current
• Fixed 5.0V output
• Excellent transient response
• Thermal shutdown protection

Benefits:

• Extends battery life by maintaining regulation with low input voltages.
• Provides ample current for a variety of loads.
• Offers a stable and accurate output voltage.
• Maintains stable output voltage during load changes.
• Protects the regulator from overheating.

Additional Details:

The SPX2945T-5.0 features a dropout voltage of typically 380mV at 500mA. It operates with an input voltage range of up to 16V. The output voltage accuracy is typically ±2%. The quiescent current is typically 1.5mA. It is available in a TO-220 package. The thermal shutdown protection disables the output when the junction temperature exceeds a certain threshold, preventing damage to the regulator.

The low dropout voltage and excellent transient response of the SPX2945T-5.0 make it an ideal choice for applications requiring a stable and efficient 5.0V supply from a battery or other voltage source.