The LR3965G-ADJ-TN5-R is an adjustable low dropout (LDO) voltage regulator manufactured by UTC (Unisonic Technologies Co., Ltd.). This regulator is designed to provide a stable and regulated output voltage from a higher input voltage, with minimal voltage drop, making it suitable for battery-powered devices and other applications where efficiency is critical.

Applications

• Battery-powered devices
• Portable electronics
• Power management systems
• Microcontroller power supplies
• Post-regulation for switching power supplies

Features

• Adjustable output voltage: Allows for fine-tuning the output voltage to meet specific requirements.
• Low dropout voltage: Maintains regulation with minimal input-to-output voltage difference.
• Low quiescent current: Minimizes power consumption when no load is present.
• Over-current protection: Protects the regulator from damage due to excessive current draw.
• Thermal shutdown: Prevents overheating and damage to the regulator.
• Stable with low ESR ceramic capacitors: Ensures stable operation with a wide range of capacitor types.

Benefits

• Extended battery life: Low quiescent current and efficient regulation minimize power consumption.
• Stable output voltage: Provides a consistent and reliable voltage supply for sensitive components.
• Protection against faults: Over-current and thermal shutdown features prevent damage.
• Flexibility in design: Adjustable output voltage allows for customization.
• Reduced system cost: Requires minimal external components.

Additional Details

The LR3965G-ADJ-TN5-R requires external resistors to set the output voltage (consult datasheet for the resistor selection formula). Proper heat sinking may be necessary depending on the input voltage, output current, and ambient temperature. The datasheet provides detailed specifications for input voltage range, output current capability, and thermal resistance. The regulator is typically packaged in a small surface-mount package for space efficiency. The adjustment pin requires careful PCB layout to avoid noise coupling. The output capacitor is crucial for transient response performance. The device incorporates internal compensation to ensure stability over a wide range of load conditions.

This LDO regulator is commonly used in portable devices, where long battery life and stable voltage regulation are critical. UTC's commitment to quality ensures reliable performance. The adjustable output voltage feature allows designers to optimize the power supply for specific applications. The device's robust protection features safeguard against potential damage. The small size enables integration in tight spaces.