LT3082EST datasheet(7/20 Pages) LINER

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LT3082

3082f

PIN FUNCTIONS (DD/ST/TS8)

BLOCK DIAGRAM

SET

10μA

3082 BD

OUT

IN (Pins 7, 8/Pin 3/Pins 7, 8): Input. This pin supplies

power to regulate internal circuitry and supply output load

current. For the device to operate properly and regulate,

the voltage on this pin must be 1.2V to 1.4V above the

OUT pin (depending on output load current—see the

dropout voltage speciﬁcations in the Electrical Charac-

teristics table).

NC (Pins 3, 5, 6/NA/Pins 1, 6): No Connection. These

pins have no connection to internal circuitry and may be

tied to IN, OUT, GND or ﬂoated.

OUT (Pins 1, 2/Pin 2/Pins 2, 3, 4): Output. This is the

power output of the device. The LT3082 requires a 0.5mA

minimum load current or the output will not regulate.

SET (Pin 4/Pin 1/Pin 5): Set. This pin is the error ampli-

ﬁer’s noninverting input and also sets the operating bias

point of the circuit. A ﬁxed 10μA current source ﬂows

out of this pin. A single external resistor programs VOUT.

Output voltage range is 0V to 38.5V.

Exposed Pad/Tab (Pin 9/Tab/NA): Output. The Exposed

Pad of the DFN package and the Tab of the SOT-223

package are tied internally to OUT. Tie them directly to OUT

pins (Pins 1, 2/Pin 2) at the PCB. The amount of copper area

and planes connected to the Exposed Pad/Tab determine

the effective thermal resistance of the packages (see the

Applications Information section).

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