The UA117KMQB is a precision adjustable voltage regulator manufactured by ON Semiconductor (formerly Fairchild Semiconductor). This device provides excellent line and load regulation and is designed for a wide range of applications requiring stable and adjustable output voltages.

Applications

• Power supplies: Provides regulated voltage for various electronic circuits.
• Instrumentation: Used in test and measurement equipment for precise voltage control.
• Battery chargers: Regulates charging voltage for batteries.
• Adjustable voltage references: Serves as a stable and adjustable voltage reference in circuits.
• Microprocessor power: Can be used to provide regulated power to microprocessors and microcontrollers.

Features

• Adjustable output voltage: Output voltage can be adjusted from 1.2V to 37V.
• High precision: Provides excellent line and load regulation.
• Short-circuit protection: Protects the regulator and connected circuitry from damage due to short circuits.
• Thermal overload protection: Prevents damage from overheating.
• Output transistor safe-area compensation: Enhances reliability and prevents damage.
• Low standby current: Minimizes power consumption when the output is not actively supplying current.
• 3-Terminal regulator: Simple to use with minimal external components.
• Excellent transient response: Provides a stable output voltage even under rapidly changing load conditions.

Benefits

• Stable and precise voltage regulation: Ensures reliable operation of connected circuits.
• Flexibility in output voltage selection: Adjustable output voltage allows for use in a wide range of applications.
• Protection against damage: Short-circuit and thermal overload protection enhance reliability.
• Easy to use: Requires minimal external components for operation.
• Energy efficient: Low standby current minimizes power consumption.

Additional Details

The UA117KMQB typically requires two external resistors to set the desired output voltage. The output voltage is determined by the ratio of these resistors. The device is available in various package options, including TO-252 and surface mount packages. Specific operating parameters, such as maximum input voltage, output current, and power dissipation, can be found in the device datasheet. Derating curves should be consulted to ensure safe operation at elevated temperatures. External capacitors may be required at the input and output for stability. The part is manufactured to military specifications and undergoes rigorous testing and qualification processes to ensure high reliability and performance in demanding environments. Refer to the official datasheet for specific values and performance curves.

This adjustable voltage regulator is a reliable and versatile component for applications requiring precise and adjustable voltage regulation. Its comprehensive protection features and ease of use make it a popular choice for a wide range of electronic circuits.