The LD1117AL-ADJ is an adjustable low dropout (LDO) voltage regulator manufactured by UTC (Unisonic Technologies Co., Ltd.). It is designed to provide a stable and regulated output voltage from a higher input voltage, even when the input voltage is close to the desired output voltage. The 'ADJ' suffix indicates that the output voltage is adjustable, allowing for a wide range of output voltages to be supported by a single device through the use of external resistors.

Applications

• Post Regulation for Switching Supplies: Cleaning up the output voltage from a switching power supply.
• Battery Chargers: Regulating the charging voltage for batteries.
• Motherboard Applications: Providing regulated voltage for various components on a motherboard.
• Microprocessor Power Supplies: Supplying stable voltage to microprocessors and microcontrollers.
• Instrumentation: Ensuring accurate and stable voltage for measurement and control circuits.

Features

• Adjustable Output Voltage: Output voltage can be set using external resistors.
• Low Dropout Voltage: Maintains regulation with a small difference between input and output voltage.
• Output Current of 800mA: Provides sufficient current for a wide range of applications.
• Thermal Overload Protection: Protects the device from overheating due to excessive power dissipation.
• Short Circuit Protection: Protects the device and the load from damage in the event of a short circuit.

Benefits

• Versatile Voltage Regulation: Adjustable output allows for a single regulator to be used in multiple applications.
• Efficient Power Conversion: Low dropout voltage minimizes power loss and improves efficiency.
• Reliable Operation: Built-in protection features ensure stable and reliable operation.
• Simplified Design: Requires only a few external components for operation.
• Cost-Effective Solution: Provides a reliable and efficient voltage regulation solution at a competitive price.

The LD1117AL-ADJ typically comes in a SOT-223 package. The output voltage can be adjusted using two external resistors according to the formula provided in the datasheet. It is important to select appropriate resistor values to achieve the desired output voltage and ensure stable operation. The device's datasheet provides detailed information on the selection of external components and the design of the voltage regulation circuit.