LT3080EST datasheet(3/26 Pages) LINER

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LT3080

3080fb

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

SET Pin Current

ISET VIN = 1V, VCONTROL = 2.0V, ILOAD = 1mA, TJ = 25°C

VIN ≥ 1V, VCONTROL ≥ 2.0V, 1mA ≤ ILOAD ≤ 1.1A (Note 9)

9.90

9.80

10.10

10.20

μA

Output Offset Voltage (VOUT – VSET)

VIN = 1V, VCONTROL = 2V, IOUT = 1mA

VOS DFN and MSOP Package

–2

–3.5

3.5

SOT-223, DD-Pak and T0-220 Package

–5

–6

Load Regulation

ΔISET

ΔVOS

ΔILOAD = 1mA to 1.1A

ΔILOAD = 1mA to 1.1A (Note 8)

–0.1

0.6

1.3

Line Regulation (Note 9)

DFN and MSOP Package

ΔISET

ΔVOS

VIN = 1V to 25V, VCONTROL = 2V to 25V, ILOAD = 1mA

0.1

0.003

0.5

nA/V

mV/V

Line Regulation (Note 9)

SOT-223, DD-Pak and T0-220 Package

ΔISET

ΔVOS

VIN = 1V to 26V, VCONTROL = 2V to 26V, ILOAD = 1mA

0.1

0.003

0.5

nA/V

mV/V

Minimum Load Current (Notes 3, 9)

VIN = VCONTROL = 10V

VIN = VCONTROL = 25V (DFN and MSOP Package)

VIN = VCONTROL = 26V (SOT-223, DD-Pak and T0-220 Package)

300

500

μA

VCONTROL Dropout Voltage (Note 4)

ILOAD = 100mA

ILOAD = 1.1A

1.2

1.35

1.6

VIN Dropout Voltage (Note 4)

ILOAD = 100mA

ILOAD = 1.1A

100

350

200

500

VCONTROL Pin Current

ILOAD = 100mA

ILOAD = 1.1A

Current Limit

VIN = 5V, VCONTROL = 5V, VSET = 0V, VOUT = –0.1V

1.1

1.4

Error Ampliﬁer RMS Output Noise (Note 6)

ILOAD = 1.1A, 10Hz ≤ f ≤ 100kHz, COUT = 10μF, CSET = 0.1μF

μVRMS

Reference Current RMS Output Noise (Note 6)

10Hz ≤ f ≤ 100kHz

nARMS

Ripple Rejection

f = 120Hz, VRIPPLE = 0.5VP-P, ILOAD = 0.2A, CSET = 0.1μF, COUT = 2.2μF

f = 10kHz

f = 1MHz

Thermal Regulation, ISET

10ms Pulse

0.003

%/W

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 speciﬁed, all voltages are with respect to VOUT.

The LT3080 is tested and speciﬁed under pulse load conditions such that

TJ ≈ TA. The LT3080 E-Grade is 100% tested at TA = 25°C. Performance at

–40°C 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 (VCONTROL) or minimum input voltage (VIN). Both parameters are

speciﬁed with respect to the output voltage. The speciﬁcations represent the

minimum input-to-output differential voltage required to maintain regulation.

Note 5: The VCONTROL 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

resistor shot noise and reference current noise; output noise is then equal

to error ampliﬁer 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 (VIN–VOUT) greater than 25V (DFN and MSOP package) or 26V

(SOT-223, DD-Pak and T0-220 Package). Operation at voltages for both IN

and VCONTROL is allowed up to a maximum of 36V as long as the difference

between input and output voltage is below the speciﬁed differential

(VIN–VOUT) voltage. Line and load regulation speciﬁcations are not

applicable when the device is in current limit.

Note 10: This IC includes overtemperature protection that is intended

to protect the device during momentary overload conditions. Junction

temperature will exceed the maximum operating junction temperature

when overtemperature protection is active. Continuous operation above

the speciﬁed maximum operating junction temperature may impair device

reliability.

Note 11: The SOT-223 package connects the IN and VCONTROL pins

together internally. Therefore, test conditions for this pin follow the

VCONTROL conditions listed in the Electrical Characteristics Table.

ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C. (Note 11)

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