LT3080EDD LINER [Linear Technology], LT3080EDD Datasheet - Page 7

• Manufacturer Part Number: LT3080EDD
• Description: Adjustable1.1A Single Resistor Low Dropout Regulator
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFORMANCE CHARACTERISTICS
PIN FUNCTIONS
V
supply pin for the control circuitry of the device. The cur-
rent fl ow 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 1.35V greater than the output voltage (see dropout
specifi cations).
IN (Pins 7, 8/Pins 7, 8/Pin 5/Pin 5/Pin 3): This is the
collector to the power device of the LT3080. The output
load current is supplied through this pin. 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
specifi cations).
NC (Pin 6/Pin 6/Pin 1/Pin 1/NA): No Connection. No con-
nect pins have no connection to internal circuitry and may
be tied to V
CONTROL
(Pin 5/Pin 5/Pin 4/Pin 4/NA): This pin is the
IN
100μV/DIV
, V
CONTROL
V
OUT
Output Voltage Noise
V
R
C
C
I
LOAD
OUT
SET
OUT
SET
= O.1μF
= 100k
, V
= 1V
= 10μF
= 1.1A
OUT
(DD/MS8E/Q/T/ST)
, GND or fl oated.
TIME 1ms/DIV
3080 G26
OUT (Pins 1-3/Pins 1-3/Pin 3/Pin 3/Pin 2): This is the
power output of the device. There must be a minimum
load current of 1mA or the output may not regulate.
SET (Pin 4/Pin 4/Pin 2/Pin 2/Pin 1): This pin is the input
to the error amplifi er and the regulation set point for
the device. A fi xed current of 10μA fl ows out of this pin
through a single external resistor, which programs the
output voltage of the device. Output voltage range is zero
to the absolute maximum rated output voltage. Transient
performance can be improved by adding a small capacitor
from the SET pin to ground.
Exposed Pad (Pin 9/Pin 9/NA/NA/NA): OUT on MS8E and
DFN packages.
TAB: OUT on DD-Pak, TO-220 and SOT-223 packages.
–10
–15
–20
–25
–30
20
15
10
–5
5
0
10
Error Amplifi er Gain and Phase
100
FREQUENCY (Hz)
1k
10k
I
I
L
L
= 100mA
= 100mA
I
I
L
100k
L
= 1.1A
= 1.1A
3080 G28
1M
300
250
200
150
100
50
0
–50
–100
–150
–200
LT3080
3080fb
7