Datasheet LT3082 (Analog Devices) - 7

LT3082
PIN FUNCTIONS (DD/ST/TS8) IN (Pins 7, 8/Pin 3/Pins 7, 8):
Input. This pin supplies
SET (Pin 4/Pin 1/Pin 5):
Set. This pin is the error ampli- power to regulate internal circuitry and supply output load fi er’s noninverting input and also sets the operating bias current. For the device to operate properly and regulate, point of the circuit. A fi xed 10μA current source fl ows the voltage on this pin must be 1.2V to 1.4V above the out of this pin. A single external resistor programs VOUT. OUT pin (depending on output load current—see the Output voltage range is 0V to 38.5V. dropout voltage specifi cations in the Electrical Charac-
Exposed Pad/Tab (Pin 9/Tab/NA):
Output. The Exposed teristics table). Pad of the DFN package and the Tab of the SOT-223
NC (Pins 3, 5, 6/NA/Pins 1, 6):
No Connection. These package are tied internally to OUT. Tie them directly to OUT pins have no connection to internal circuitry and may be pins (Pins 1, 2/Pin 2) at the PCB. The amount of copper area tied to IN, OUT, GND or fl oated. and planes connected to the Exposed Pad/Tab determine the effective thermal resistance of the packages (see the
OUT (Pins 1, 2/Pin 2/Pins 2, 3, 4):
Output. This is the Applications Information section). power output of the device. The LT3082 requires a 0.5mA minimum load current or the output will not regulate.
BLOCK DIAGRAM
IN 10μA + – SET OUT 3082 BD 3082f 7