LM1085 ADJ 3A Adjustable Low Dropout LDO Positive Voltage Regulator

LM1085 ADJ 3A Adjustable Low Dropout LDO Positive Voltage Regulator 

The LM1085-ADJ (LM1085 Adjustable) is a high-current low dropout (LDO) linear voltage regulator capable of delivering up to 3A output current with an adjustable output voltage. The output voltage can be set from 1.25V up to 12V or higher (depending on input voltage) using only two external resistors, making it highly flexible for a wide range of power supply designs.

With a low dropout voltage of typically around 1.3V at full load, the LM1085 is ideal for post-regulation of switching power supplies, 5V to 3.3V conversion, battery-powered systems, and high-current low-voltage rails. It includes built-in current limiting and thermal shutdown protection, ensuring safe and reliable operation.

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Applications

• High-current adjustable DC power supplies
• Post-regulation for DC-DC converters and SMPS
• 5V to 3.3V or lower voltage conversion at high current
• FPGA, DSP, microprocessor, and MCU power rails
• Embedded systems and development boards
• Battery-powered and portable equipment
• Industrial and consumer electronics

Features

• Output Type: Adjustable
• Output Voltage Range: 1.25V to ~12V+ (set by external resistors)
• Maximum Output Current: Up to 3A
• Low Dropout Voltage: Typically ~1.3V at 3A
• Regulator Type: Positive LDO linear regulator
• Built-in thermal shutdown and current limiting protection
• Excellent line and load regulation
• Requires only two resistors to set output voltage
• Available in TO-220, TO-263, and other packages

LM1085-ADJ Datasheet