lt3080-1 Linear Technology Corporation, lt3080-1 Datasheet - Page 3

• Manufacturer Part Number: lt3080-1
• Description: Parallelable 1.1a Adjustable 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 LT3080-1 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 LT3080-1, 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.
ELECTRICAL CHARACTERISTICS
PARAMETER
SET Pin Current
Output Offset Voltage (V
Load Regulation
Line Regulation (Note 9)
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
CONTROL
IN
≈ T
Dropout Voltage (Note 4)
A
. The LT3080-1 is 100% tested at T
CONTROL
Dropout Voltage (Note 4)
) or minimum input voltage (V
SET
OUT
– V
SET
)
I
V
ΔI
ΔV
ΔV
ΔI
ΔV
SET
OS
SET
SET
OS
OS
OS
A
= 25°C. Performance at –40°C
IN
CONDITIONS
V
V
V
ΔI
ΔI
ΔI
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
LOAD
LOAD
LOAD
= 1V, V
≥ 1V, V
= 1V, V
= 1V to 22V, V
= 1V to 22V, V
= V
= V
= 5V, V
= 100mA
= 1.1A
= 100mA
= 1.1A
= 100mA
= 1.1A
= 1.1A, 10Hz ≤ f ≤ 100kHz, C
CONTROL
CONTROL
= 1mA to 1.1A
= 1mA to 1.1A (Note 8)
= 1mA to 1.1A (Note 8)
CONTROL
CONTROL
CONTROL
CONTROL
RIPPLE
A
= 25°C.
= 22V
= 10V
= 0.5V
CONTROL
CONTROL
= 2V, I
The
= 2.0V, I
≥ 2.0V, 1mA ≤ I
= 5V, V
OUT
.
P-P
●
OUT
=1V to 22V, I
=1V to 22V, I
, I
SET
denotes the specifi cations which apply over the full operating
LOAD
LOAD
= 1mA
= 0V, V
Note 6: Output noise is lowered by adding a small capacitor across the
voltage setting resistor. Adding this capacitor bypasses the voltage setting
resistor shot noise and reference current noise; output noise is then equal
to error amplifi er noise (see the 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
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.
OUT
= 0.2A, C
= 1mA, T
OUT
LOAD
) voltage. Line and load regulation specifi cations are not applicable
CONTROL
OUT
LOAD
LOAD
= 10μF, C
≤ 1.1A (Note 9)
SET
= –0.1V
J
IN
=1mA
=1mA
= 25°C
–V
= 0.1μF, C
is allowed up to a maximum of 36V as long as the difference
OUT
SET
) greater than 22V. Operation at voltages for both IN
= 0.1μF
OUT
= 2.2μF
●
●
●
●
●
●
●
●
●
●
●
●
9.90
9.80
–3.5
MIN
1.1
–2
0.003
0.003
–0.1
27.5
1.35
TYP
300
100
350
LT3080-1
0.1
1.2
1.4
10
10
17
40
75
55
20
4
1
10.10
10.20
MAX
500
200
500
3.5
0.5
1.6
34
48
30
2
1
6
UNITS
μV
nA
mV/V
IN
30801f
3
%/W
nA/V
RMS
RMS
–
mV
mV
mV
mV
mA
mV
mV
mA
mA
μA
μA
nA
μA
dB
dB
dB
V
V
A