lt3080 Linear Technology Corporation, lt3080 Datasheet - Page 3

• Manufacturer Part Number: lt3080
• Description: Adjustable 1.1a Single Resistor Low Dropout Regulator
• Manufacturer: Linear Technology Corporation

Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: Unless otherwise specifi ed, all voltages are with respect to V
The LT3080 is tested and specifi ed under pulse load conditions such that
T
and 125°C is assured by design, characterization and correlation with
statistical process controls.
Note 3: Minimum load current is equivalent to the quiescent current of
the part. Since all quiescent and drive current is delivered to the output
of the part, the minimum load current is the minimum current required to
maintain regulation.
Note 4: For the LT3080, dropout is caused by either minimum control
voltage (V
specifi ed with respect to the output voltage. The specifi cations represent the
minimum input-to-output differential voltage required to maintain regulation.
Note 5: The CONTROL pin current is the drive current required for the
output transistor. This current will track output current with roughly a 1:60
ratio. The minimum value is equal to the quiescent current of the device.
Note 6: Output noise is lowered by adding a small capacitor across the
voltage setting resistor. Adding this capacitor bypasses the voltage setting
ELECTRICAL CHARACTERISTICS
PARAMETER
SET Pin Currrent
Output Offset Voltage (V
V
Load Regulation
Line Regulation (Note 9)
DFN and MSOP Package
Line Regulation (Note 9)
SOT-223 and TO-220 Package
Minimum Load Current (Notes 3, 9)
V
V
CONTROL Pin Current
Current Limit
Error Amplifi er RMS Output Noise (Note 6)
Reference Current RMS Output Noise (Note 6) 10Hz ≤ f ≤ 100kHz
Ripple Rejection
Thermal Regulation, I
temperature range, otherwise specifi cations are at T
J
IN
CONTROL
IN
≈ T
= 1V, V
Dropout Voltage (Note 4)
A
. The LT3080 is 100% tested at T
CONTROL
Dropout Voltage (Note 4)
CONTROL
) or minimum input voltage (V
= 2V, I
SET
OUT
OUT
– V
= 1mA
SET
)
I
V
ΔI
ΔV
ΔI
ΔV
ΔI
ΔV
SET
A
OS
SET
SET
SET
OS
= 25°C. Performance at –40°C
OS
OS
IN
CONDITIONS
V
V
DFN and MSOP Package
SOT-223 and T0-220 Package
ΔI
ΔI
V
V
V
V
V
V
V
I
I
I
I
I
I
V
I
f = 120Hz, V
f = 10kHz
f = 1MHz
10ms Pulse
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
). Both parameters are
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
LOAD
LOAD
= 1V, V
≥ 1V, V
= 1V to 25V, V
= 1V to 25V, V
= 1V to 26V, V
= 1V to 26V, V
= V
= V
= V
= 5V, V
= 100mA
= 1.1A
= 100mA
= 1.1A
= 100mA
= 1.1A
= 1.1A, 10Hz ≤ f ≤ 100kHz, C
CONTROL
CONTROL
CONTROL
= 1mA to 1.1A
= 1mA to 1.1A (Note 8)
CONTROL
CONTROL
CONTROL
RIPPLE
A
= 25°C. (Note 11)
= 25V (DFN and MSOP Package)
= 10V
= 26V (SOT-223 and TO-220 Package)
= 0.5V
CONTROL
CONTROL
CONTROL
CONTROL
The
= 2.0V, I
≥ 2.0V, 1mA ≤ I
= 5V, V
OUT
.
P-P
●
=1V to 25V, I
=1V to 25V, I
=1V to 26V, I
=1V to 26V, I
, I
SET
denotes the specifi cations which apply over the full operating
LOAD
LOAD
= 0V, V
resistor shot noise and reference current noise; output noise is then equal
to error amplifi er noise (see Applications Information section).
Note 7: SET pin is clamped to the output with diodes. These diodes only
carry current under transient overloads.
Note 8: Load regulation is Kelvin sensed at the package.
Note 9: Current limit may decrease to zero at input-to-output differential
voltages (V
(SOT-223 and TO-220 package). Operation at voltages for both IN and
V
between input and output voltage is below the specifi ed differential (V
V
when the device is in current limit.
Note 10: This IC includes over-temperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed the maximum operating junction temperature
when over-temperature protection is active. Continuous operation above
the specifi ed maximum operating junction temperature may impair device
reliability.
Note 11: The SOT-223 package connects the IN and V
together internally. Therefore, test conditions for this pin follow the
V
CONTROL
OUT
CONTROL
= 0.2A, C
= 1mA, T
OUT
LOAD
) voltage. Line and load regulation specifi cations are not applicable
OUT
LOAD
LOAD
LOAD
LOAD
= 10μF, C
≤ 1.1A (Note 9)
SET
is allowed up to a maximum of 36V as long as the difference
conditions listed in the Electrical Characteristics Table.
= –0.1V
J
IN
=1mA
=1mA
=1mA
=1mA
= 25°C
–V
= 0.1μF, C
OUT
SET
) greater than 25V (DFN and MSOP package) or 26V
= 0.1μF
OUT
= 2.2μF
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
9.90
9.80
–3.5
MIN
1.1
–5
–6
–2
0.003
0.003
0.003
–0.1
1.35
TYP
300
100
350
0.6
0.1
0.1
1.2
1.4
10
10
17
40
75
55
20
4
1
CONTROL
LT3080
10.10
10.20
MAX
500
200
500
3.5
1.3
0.5
0.5
1.6
30
2
5
6
1
1
6
pins
UNITS
μV
nA
mV/V
mV/V
IN
3
%/W
nA/V
nA/V
3080f
RMS
RMS
–
mV
mV
mV
mV
mV
mA
mA
mV
mV
mA
mA
μA
μA
nA
μA
dB
dB
dB
V
V
A