The SPX3940AM3-2.5/TR is a 1A low dropout (LDO) regulator from Sipex (now MaxLinear), designed to provide a stable 2.5V output voltage. It's ideal for battery-powered systems and other applications where efficiency and minimal voltage drop are critical.

Applications

• Battery-Powered Devices: Efficiently regulating voltage in portable devices like PDAs, cell phones, and MP3 players.
• Post Regulation for Switching Power Supplies: Reducing ripple and noise after a switching regulator.
• Microcontroller Power Supplies: Providing a stable 2.5V supply for microcontrollers and other digital logic.
• DSP Core Power: Powering the core of digital signal processors.
• PCMCIA Cards: Regulating voltage for PCMCIA card interfaces.

Features

• Fixed 2.5V Output Voltage: Provides a precisely regulated 2.5V output.
• 1A Output Current Capability: Delivers up to 1A of output current to power connected loads.
• Low Dropout Voltage: Operates with a minimal voltage difference between input and output (typically 300mV at 1A).
• Low Quiescent Current: Minimizes power consumption when the regulator is not actively supplying a load.
• Short-Circuit Protection: Protects the regulator and the load from damage due to short circuits.
• Over-Temperature Protection: Shuts down the regulator if the junction temperature exceeds safe limits.

Benefits

• Extended Battery Life: Low dropout voltage and low quiescent current contribute to longer battery life in portable devices.
• Stable Power Supply: Provides a consistent and reliable 2.5V output, even with variations in input voltage and load current.
• Overload Protection: Built-in protection features safeguard the regulator and connected circuits from damage.
• Compact Design: Small package size allows for use in space-constrained applications.
• Easy to Use: Requires minimal external components for operation.

Technical Specifications:

• Output Voltage: 2.5V
• Output Current: 1A
• Dropout Voltage (Typical): 300mV at 1A
• Quiescent Current (Typical): 5mA
• Input Voltage Range: 2.7V to 10V
• Operating Temperature Range: -40°C to +125°C
• Package: SOT-223