The LT3085EMS8E#PBF is an Adjustable 500mA Single Resistor Low Dropout Linear Regulator paralleled to increase output current or spread heat in surface mounted boards. Architected as a precision current source and voltage follower, this regulator benefits 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 2.2μF 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.
Outputs may be paralleled for higher current and heat spreading
Single resistor programs output voltage
1% Initial accuracy of SET pin current
Output adjustable to 0V
Current limit constant with temperature
Low output noise (40μVRMS, 10Hz to 100kHz)
Low dropout voltage (350mV)
<1mV Load regulation
<0.001%/V line regulation
0.5mA Minimum load current
Stable with 2.2μF minimum ceramic output capacitor
Current limit with fold back and over-temperature protected
(EN)
