Datasheet LT3080 (Analog Devices) - 8

LT3080
Typical perForMance characTerisTics Output Voltage Noise Error Amplifier Gain and Phase
20 300 15 250 V 10 200 OUT 100µV/DIV I PHASE (DEGREES) 5 L = 1.1A 150 0 100 –5 IL = 100mA 50 TIME 1ms/DIV 3080 G27 VOUT = 1V I R GAIN (dB) –10 L = 1.1A 0 SET = 100k CSET = O.1µF –15 –50 COUT = 10µF IL = 100mA ILOAD = 1.1A –20 –100 –25 –150 –30 –200 10 100 1k 10k 100k 1M FREQUENCY (Hz) 3080 G28
pin FuncTions (DD/MS8E/Q/T/ST) VCONTROL (Pin 5/Pin 5/Pin 4/Pin 4/NA):
This pin is the
OUT (Pins 1-3/Pins 1-3/Pin 3/Pin 3/Pin 2):
This is the supply pin for the control circuitry of the device. The cur- power output of the device. There must be a minimum rent flow into this pin is about 1.7% of the output current. load current of 1mA or the output may not regulate. For the device to regulate, this voltage must be more than
SET (Pin 4/Pin 4/Pin 2/Pin 2/Pin 1):
This pin is the input 1.2V to 1.35V greater than the output voltage (see dropout to the error amplifier and the regulation set point for specifications). the device. A fixed current of 10µA flows out of this pin
IN (Pins 7, 8/Pins 7, 8/Pin 5/Pin 5/Pin 3):
This is the through a single external resistor, which programs the collector to the power device of the LT3080. The output output voltage of the device. Output voltage range is zero load current is supplied through this pin. For the device to the absolute maximum rated output voltage. Transient to regulate, the voltage at this pin must be more than performance can be improved by adding a small capacitor 0.1V to 0.5V greater than the output voltage (see dropout from the SET pin to ground. specifications).
Exposed Pad (Pin 9/Pin 9/NA/NA/NA):
OUT on MS8E and
NC (Pin 6/Pin 6/Pin 1/Pin 1/NA):
No Connection. No con- DFN packages. nect pins have no connection to internal circuitry and may
TAB:
OUT on DD-Pak, TO-220 and SOT-223 packages. be tied to VIN, VCONTROL, VOUT , GND or floated. 3080fc 8 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts