LT3085

VCONTROL Pin Voltage ............................... 40V, 0.3V
IN Pin Voltage ............................................ 40V, 0.3V
SET Pin Current (Note 7) .................................. ±15mA
SET Pin Voltage (Relative to OUT) ........................±10V
Output Short-Circuit Duration ....................... Indefi nite
Operating Junction Temperature Range (Notes 2, 10)
   E, I Grade .......................................... 40 to 125
   MP Grade .......................................... 55 to 125
Storage Temperature Range ................ 65 to 150
Lead Temperature (Soldering, 10 sec)
   MS8E Package Only .......................................... 300

The LT^®3085 is a 500mA low dropout linear regulator that can be paralleled to increase output current or spread heat on surface mounted boards. Designed as a precision current source and voltage follower, this new regulator fi nds use in many applications requiring high current, adjustability to zero, and no heat sink. The device also brings out the collector of the pass transistor to allow low dropout operation-down to 275mV-when used with a second supply.

A key feature of the LT3085 is the capability to supply a wide output voltage range. By using a reference current
through a single resistor, the output voltage is programmed to any level between zero and 36V. The LT3085 is stable with 2.2F of capacitance on the output, and the IC uses small ceramic capacitors that do not require additional ESR as is common with other regulators.

Internal protection circuitry includes current limiting and thermal limiting. The LT3085 is offered in the 8-lead MSOP and a low profi le (0.75mm) 6-lead 2mm * 3mm DFN package (both with an Exposed Pad for better thermal characteristics).