UA78L05CDR

The UA78L05CDR is a low-dropout (LDO) voltage regulator manufactured by Texas Instruments. It is designed to provide a stable output voltage of 5 volts with a maximum output current of 100 mA. This component is particularly useful in applications where space is limited and efficiency is crucial, such as in battery-powered devices and portable electronics.

Key Features:

1. Output Voltage: The UA78L05CDR delivers a fixed output voltage of 5V, making it suitable for powering various low-voltage digital circuits and microcontrollers.

2. Input Voltage Range: The device can accept a wide input voltage range, typically from 7V to 20V, allowing it to be used in various power supply configurations.

3. Low Dropout Voltage: With a dropout voltage of around 0.2V at full load, the UA78L05CDR can maintain regulation even when the input voltage is close to the output voltage, which is beneficial for battery-operated devices.

4. Thermal Protection: The regulator includes built-in thermal overload protection, which helps prevent damage due to overheating by shutting down the output if the junction temperature exceeds safe limits.

5. Short-Circuit Protection: The UA78L05CDR is designed to protect itself from short circuits, ensuring that it can handle fault conditions without sustaining damage.

6. Package Type: The device is available in a compact surface-mount package (SOT-223), which is ideal for space-constrained applications. The small footprint allows for easy integration into printed circuit boards (PCBs).

7. Low Noise: The regulator provides a low output noise level, making it suitable for sensitive analog applications where power supply noise can affect performance.

8. Ease of Use: The UA78L05CDR requires minimal external components for operation, typically just a couple of capacitors for stability, simplifying the design process.

Applications:

• Power supply for microcontrollers and digital logic circuits
• Battery-powered devices
• Portable electronics
• Communication equipment
• Automotive electronics

Electrical Characteristics:

• Output Current: 100 mA (maximum)
• Dropout Voltage: 0.2V (typical at 100 mA)
• Quiescent Current: Low quiescent current, enhancing efficiency in battery-operated applications.

Conclusion:

The UA78L05CDR from Texas Instruments is a reliable and efficient voltage regulator that provides a stable 5V output with low dropout and thermal protection features. Its compact size and ease of integration make it a popular choice for a wide range of electronic applications, particularly where space and power efficiency are critical.