The UZ1084 is a series of low dropout (LDO) positive voltage regulators manufactured by UTC (Unisonic Technologies Co., Ltd.). These regulators are designed to provide a stable and reliable output voltage with a minimal voltage difference between the input and output.

Applications

• High-Efficiency Linear Regulators: Used where minimizing power dissipation is crucial.
• Post Regulators for Switching Supplies: Clean up the output of switching power supplies.
• Battery Chargers: Regulate the charging voltage for various battery types.
• Microprocessor Power Supplies: Provide stable voltage for microprocessors and microcontrollers.

Features

• Low Dropout Voltage: Typically 1.5V at 7A output current.
• Adjustable Output Voltage: Can be adjusted using external resistors (for adjustable versions).
• Fixed Output Voltages Available: Several fixed voltage options are offered.
• Current Limiting: Protects the regulator and the load from overcurrent conditions.
• Thermal Shutdown: Shuts down the regulator if the junction temperature exceeds a certain limit.
• Reverse Battery Protection: Protects the regulator from damage if the battery is connected in reverse polarity (depending on the specific implementation).

Benefits

• Improved Efficiency: Low dropout voltage minimizes power loss, resulting in higher efficiency.
• Stable Output Voltage: Provides a stable and regulated output voltage even with variations in input voltage or load current.
• Protection Features: Overcurrent and thermal protection ensure reliable operation and prevent damage.
• Easy to Use: Simple to implement with minimal external components required.

Additional Details

The UZ1084 is typically available in TO-220, TO-263, and other similar packages. It is crucial to consult the specific datasheet for the exact specifications, including input voltage range, output voltage options, dropout voltage characteristics, and thermal resistance. The adjustable versions use external resistors to set the desired output voltage, requiring careful selection of resistor values to ensure accurate regulation. Proper heat sinking is often required, especially at higher output currents, to prevent overheating and ensure reliable operation.