The UTCLD1117AL-ADJ-A is an adjustable low dropout (LDO) voltage regulator manufactured by UTC (Unisonic Technologies Co., Ltd.). This regulator is designed to provide a stable and adjustable output voltage from a higher input voltage with a low dropout voltage, making it suitable for battery-powered and portable applications.

Applications:

• Battery Chargers
• Post Regulators for Switching Supplies
• Microprocessor Power Supplies
• Portable Electronics
• Linear Regulators

Features:

• Adjustable Output Voltage: Output voltage can be set using external resistors.
• Low Dropout Voltage: Typically 1.2V at 1A.
• Output Current: Up to 1A output current capability.
• Thermal Overload Protection: Shuts down the regulator in case of excessive heat.
• Current Limiting: Prevents damage from short circuits.

Benefits:

• Flexible Output Voltage: Adjustable output allows for use in various applications with different voltage requirements.
• Efficient Operation: Low dropout voltage minimizes power dissipation and improves efficiency, especially in battery-powered applications.
• Overload Protection: Thermal overload and current limiting prevent damage, enhancing reliability.
• Simple Implementation: Requires only a few external components for operation.
• Compact Design: Available in small packages for space-constrained applications.

Additional Details:

The UTCLD1117AL-ADJ-A is typically available in SOT-223 and other surface-mount packages. The output voltage can be adjusted using a resistor divider connected to the feedback pin. Key specifications include an input voltage range of typically up to 15V, although this depends on the exact variant used, and a dropout voltage of around 1.2V at 1A. It is designed to operate within a wide temperature range. The low dropout voltage makes it particularly useful in applications where the input voltage is close to the desired output voltage, such as in battery-powered devices.