Overview
The UC282 and UC382 series are low-dropout (LDO) linear regulators produced by Texas Instruments, known for their fast transient response and suitability for high-performance applications. Capable of handling load currents from 10 mA to 3 A, they offer robust protection features including short circuit protection and reverse current protection. These regulators boast a maximum dropout of 450 mV at 3 A load current and are available in both adjustable and fixed-output voltage versions.
Key Features
The datasheet highlights several important features of the UC282/UC382 series:
- Fast Transient Response: These regulators are optimized to react quickly to changes in load, which is vital for maintaining output voltage stability.
- Low Dropout Voltage: With a maximum dropout voltage of 450 mV at 3 A when the temperature is at 100 degrees Celsius, these LDOs maintain efficiency and reduce power loss.
- Adjustable Output: The adjustable version of the regulator can be set using two external resistors. If resistors are not used, the output defaults to 1.2 V.
- Stable Reference Voltage: The onboard 1.2 V bandgap reference is temperature stable, providing a consistent input to the power amplifier.
- Thermal Shutdown Protection: This safety feature prevents damage from overheating by shutting down the regulator if a high temperature is reached.
- Separate Bias and VIN Pins: The provision of separate pins facilitates flexibility in biasing for improved performance.
Packaging and Availability
The LDOs come in 5-pin TO-220 and TO-263 packages. The TO-220 package has a Kelvin sensing feature for precise load voltage measurement.
Applications
Designed for precision and efficiency, the UC282/UC382-series LDOs are suitable for a variety of high-performance applications. They are particularly adept at driving GTL (Gunning Transceiver Logic) and BTL (Backplane Transceiver Logic) buses due to the fast response time to load transients. This feature allows the use of less decoupling capacitance compared to standard LDOs.
Voltage Options
The fixed-output versions are available in 1.5 V, 2.1 V, and 2.5 V configurations, while the adjustable version offers flexibility with user-defined output voltages.
Legal and Compliance Information
Important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products, along with associated disclaimers, is indicated at the end of the datasheet. Trademarks mentioned belong to their respective owners, and production data is current as of the publication date. Conformance to specifications is included per the terms of Texas Instruments’ standard warranty. Production processing may not include testing of all parameters.
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