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LT3080-1 Datasheet(PDF) 9 Page - Linear Technology |
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LT3080-1 Datasheet(HTML) 9 Page - Linear Technology |
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9 / 28 page  LT3083 9 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) |
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