LT3083MPDF datasheet(9/28 Pages) LINER

9 / 28 page

LT3083

3083f

PIN FUNCTIONS

OUT (Pins 1-5,13/Pins 1-6,8,9,16,17/ Pin 3, Tab/Pin 3,

Tab): Output. The exposed pad of the DF package (Pin 13)

and the FE package (Pin 17) and the Tab of the DD-PAK

and TO-220 packages is an electrical connection to OUT.

Connect the exposed pad of the DF and FE packages and

the Tab of the DD-PAK package directly to OUT on the

PCB and the respective OUT pins for each package. There

must be a minimum load current of 1mA or the output

may not regulate.

SET (Pin 6/Pin 7/Pin 2/Pin 2): Set Point. This pin is the

non-inverting input to the error ampliﬁer and the regula-

tion set point. A ﬁxed current of 50μA ﬂows out of this

pin through a single external resistor, which programs

the output voltage of the device. Output voltage range is

zero to the VIN(MAX) – VDROPOUT. Transient performance

can be improved by adding a small capacitor from the

SET pin to ground.

VCONTROL (Pins 7,8/Pins 10,11/Pin 4/Pin 4): Bias Sup-

ply. This is the supply pin for the control circuitry of the

device. Minimum input capacitance is 2.2μF (see Input

Capacitance and Stability in the Applications Information

section). The current ﬂow into this pin is about 1.7% of

the output current. For the device to regulate, this voltage

must be more than 1.2V to 1.4V greater than the output

voltage (see dropout speciﬁcations in the Electrical Char-

acteristics section).

IN (Pins 9-12/Pins 12-15/Pin 5/Pin 5): Power Input. This

is the collector to the power device of the LT3083. The

output load current is supplied through this pin. Minimum

IN capacitance is 10μF (see Input Capacitance and Stabil-

ity in Applications Information section). For the device to

regulate, the voltage at this pin must be more than 0.1V

to 0.5V greater than the output voltage (see dropout

speciﬁcations in the Electrical Characteristics section).

NC (NA/NA/Pin 1/Pin 1): No Connection. No Connect pins

have no connection to internal circuitry and may be tied

to VIN, VCONTROL, VOUT, GND, or ﬂoated.

(DF/FE/Q/T Packages)

LT3083MPDF Datasheet(PDF) 9 Page - Linear Technology