DC1294A

DC1294A demonstration circuit shows adjustable linear regulators in parallel using LT3080. Architected as a precision current source and voltage follower, it allows new regulator to be used in many applications requiring high current, adjustability to zero output, and no heat sink. Also, the device brings out the collector of the pass transistor to allow low dropout operation when used with multiple supplies. A key feature of the LT3080 is the capability to supply a wide output voltage range. Using a reference current through a single resistor, the output voltage can be programmed to any level between zero and 36V. The DC1294A has a reduced input voltage 25V due to input capacitor voltage rating and is capable of delivering up to 4.4A output current by paralleling 4 LT3080s with only 20mohm PCB ballast resistors. The DC1294A can be used as a high current linear regulator, post regulator for switching supply, variable voltage supply or low output voltage power supply.

• Voltage range from 3.8V to 25V
• Maximum Vcontrol voltage range from 4.9 to 25V
• Output voltage of 3.3V ±3%
• Output current range from 4mA to 4.4A

Notes

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