The LP2950CN-5.0/TR is a low dropout (LDO) voltage regulator from Exar Corporation, designed to provide a stable 5V output. Its key feature is a low dropout voltage, which means it can maintain regulation even when the input voltage is only slightly higher than the output voltage. This characteristic, coupled with a low quiescent current, makes it particularly well-suited for battery-powered applications where efficiency is critical. The 'TR' suffix likely indicates that the device is provided in tape and reel packaging for automated assembly.

Applications

• Microcontroller Power Supplies: Provides a stable 5V supply for various microcontrollers and processors.
• Battery-Operated Equipment: Used extensively in portable devices, remote controls, and wireless sensors.
• Post-Regulation: Can be used to clean up the output of switching regulators, reducing noise and ripple.
• Linear Regulation in Noisy Environments: Ideal for providing stable power to sensitive analog circuits in noisy environments.
• Instrumentation and Measurement: Used in test and measurement equipment to provide a stable voltage reference.

Features

• 5V Fixed Output Voltage: Provides a regulated and stable 5V output.
• Low Dropout Voltage: Operates efficiently even with a small difference between input and output voltages.
• Low Quiescent Current: Minimizes power consumption when the regulator is not actively supplying current.
• Short Circuit Protection: Protects the regulator from damage due to output shorts.
• Thermal Overload Protection: Shuts down the regulator if it overheats, preventing damage.
• Reverse Battery Protection: Protects the regulator from damage if the battery is connected with reversed polarity.

Benefits

• Extended Battery Life: Low quiescent current and low dropout voltage contribute to longer battery life in portable devices.
• Increased System Reliability: Built-in protection features safeguard against common faults.
• Stable and Clean Power: Provides a regulated 5V output, ensuring consistent performance of connected devices.
• Simple Implementation: Requires few external components, simplifying the design process.
• Cost-Effective Solution: Offers a reliable regulation solution at a competitive price.

Additional Details

The LP2950CN-5.0/TR is typically packaged in a TO-92 package. Its ease of use and robust feature set make it a popular choice for many applications. The low dropout voltage is particularly advantageous in battery-powered systems, where the battery voltage gradually decreases over time. The device maintains regulation longer than traditional linear regulators with higher dropout voltages.

Technical Specifications:

• Output Voltage: 5V
• Dropout Voltage: Typically 380mV at 100mA
• Quiescent Current: Typically 75μA
• Operating Temperature Range: -40°C to +125°C
• Package Type: TO-92