The SPX3940T-1.8 is a 1A Low Dropout (LDO) linear regulator from Sipex Corporation (now Exar Corporation). It provides a stable and accurate 1.8V output voltage with low dropout voltage and high efficiency. This regulator is designed for applications requiring a regulated voltage supply from a higher voltage source.

Applications

• Microprocessor core supply
• Post regulator for switching supplies
• Battery-powered systems
• Portable devices
• Voltage regulation in embedded systems

Features

• 1A output current
• Low dropout voltage
• Fixed output voltage (1.8V)
• High accuracy
• Short-circuit protection
• Thermal overload protection
• SOT-223 package

Benefits

• Provides a stable and accurate 1.8V output voltage
• Reduces power consumption and heat generation
• Protects against short circuits and thermal overloads
• Simplifies circuit design
• Enhances system reliability

Additional Details

The SPX3940T-1.8 features a low dropout voltage, which allows it to operate with a small difference between the input and output voltages. The high accuracy ensures that the output voltage remains stable over a wide range of operating conditions. The short-circuit protection and thermal overload protection prevent damage to the regulator and the connected circuitry. The device is available in a SOT-223 package, which is easy to mount and provides good thermal performance. The SPX3940T-1.8 is commonly used as a microprocessor core supply, where it provides a stable voltage for the processor. It is also used as a post regulator for switching supplies, where it filters out noise and improves the output voltage quality. The input voltage range is 2.5V to 16V. The operating temperature ranges from -40°C to +125°C.