Linear Technology's LT3083EQ: Adjustable 3A Single Resistor Low Dropout Regulator

The LT3083EQ from Linear Technology is a versatile and robust low dropout voltage regulator (LDO) that delivers up to 3A of continuous output current with a dropout voltage of just 310mV at maximum load. This adjustable regulator is designed for a wide range of applications, from simple linear regulators to complex power management solutions.

One of the standout features of the LT3083EQ is its unique single-resistor output voltage setting. This simplifies circuit design and minimizes external components, as the output voltage can be set anywhere from 0V to V<sub>IN - 1.5V with a single external resistor. This feature also allows for easy adjustment of the output voltage without the need for a feedback voltage divider, which is common in other adjustable regulators.

The LT3083EQ operates with a wide input voltage range from 1.8V to 36V, making it suitable for a variety of supply sources, including automotive batteries, industrial supplies, and wall adapters. Its internal protection circuitry includes reverse-battery protection, current limiting, thermal limiting, and reverse-current protection, ensuring reliable performance under adverse conditions.

With its robust design, the LT3083EQ is housed in a rugged 5-lead TO-263 package, which is designed to handle high levels of heat dissipation, thus ensuring stability and longevity even in demanding environments. The thermal performance is further enhanced by an internal ballast transistor that spreads the heat across the device, allowing for a more even temperature distribution and improved reliability.

Key features of the LT3083EQ include:

• Adjustable output from 0V to V<sub>IN - 1.5V
• Dropout voltage of 310mV at 3A
• Single-resistor output voltage setting
• Wide input voltage range from 1.8V to 36V
• Internal protection features (reverse-battery, current limiting, thermal limiting, reverse-current protection)
• Stable with low ESR, ceramic output capacitors
• 5-lead TO-263 package

Whether you're designing power supplies for sensitive analog circuits, precision data converters, or simply need a reliable, adjustable power source, the LT3083EQ is an excellent choice that combines ease of use with robust performance.