The SPX1580T5-3.3 is a low dropout (LDO) linear regulator manufactured by Sipex Corporation (later acquired by Exar Corporation). It is designed to provide a stable and regulated 3.3V output voltage from a higher input voltage, with a low dropout voltage characteristic. This LDO regulator is ideal for applications where a stable voltage supply is needed with minimal voltage difference between the input and output, such as in battery-powered devices or systems with tight voltage tolerances.

Applications:

• Battery-powered devices: Providing regulated voltage for microcontrollers, sensors, and other components.
• Post-regulation for switching power supplies: Reducing ripple and noise from switching converters.
• Microprocessor and microcontroller power supplies: Ensuring stable voltage for reliable operation.
• Portable equipment: Powering sensitive analog and digital circuitry.
• Linear power supplies: Providing a clean and regulated voltage source.

Features:

• Low dropout voltage: Operates with a minimal voltage difference between input and output.
• Fixed 3.3V output: Provides a stable and accurate output voltage.
• High output current: Capable of delivering up to 800mA of output current.
• Short-circuit protection: Protects the regulator from damage due to output shorts.
• Over-temperature protection: Prevents thermal damage in high-temperature conditions.
• Low quiescent current: Minimizes power consumption when the regulator is in standby mode.
• Stable with ceramic capacitors: Ensures stable operation with low-ESR ceramic capacitors.

Benefits:

• Improved battery life: Low dropout voltage and low quiescent current extend battery life in portable devices.
• Stable voltage supply: Ensures reliable operation of sensitive electronic components.
• Protection against faults: Short-circuit and over-temperature protection enhance system reliability.
• Reduced noise and ripple: Provides a cleaner voltage supply compared to unregulated sources.
• Simplified design: Easy to use with minimal external components required.

The SPX1580T5-3.3 is typically available in a TO-252 (D-PAK) package. The input voltage range is typically up to 16V. The regulator requires external capacitors for stable operation. This LDO regulator's combination of low dropout voltage, high output current, and protection features makes it a suitable choice for a wide variety of power management applications.