LT1083CK Ver la hoja de datos (PDF) - Linear Technology

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componentes Descripción

Fabricante

LT1083CK

7.5A, 5A, 3A Low Dropout Positive Adjustable Regulators

Linear Technology 

LT1083/LT1084/LT1085

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

temperature range, otherwise specifications are at TA = 25°C.

PARAMETER

CONDITIONS

MIN TYP MAX

Thermal Resistance Junction-to-Case

LT1083

LT1084

LT1085

Control Circuitry/Power Transistor

K Package

P Package

K Package

P Package

T Package

K Package

M, T Package

0.6/1.6

0.5/1.6

0.75/2.3

0.65/2.3

0.65/2.7

0.9/3.0

0.7/3.0

UNITS

°C/W

°C/W

°C/W

°C/W

°C/W

°C/W

°C/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: See thermal regulation specifications for changes in output voltage

due to heating effects. Load and line regulation are measured at a constant

junction temperature by low duty cycle pulse testing.

Note 3: Line and load regulation are guaranteed up to the maximum power

dissipation (60W for the LT1083, 45W for the LT1084 (K, P), 30W for the

LT1084 (T) and 30W for the LT1085). Power dissipation is determined by

the input/output differential and the output current. Guaranteed maximum

power dissipation will not be available over the full input/output voltage

range.

Note 4: IFULL_LOAD is defined in the current limit curves. The IFULL_LOAD

curve is defined as the minimum value of current limit as a function of

input-to-output voltage. Note that the 60W power dissipation for the

LT1083 (45W for the LT1084 (K, P), 30W for the LT1084 (T), 30W for the

LT1085) is only achievable over a limited range of input-to-output voltage.

Note 5: Dropout voltage is specified over the full output current range of

the device. Test points and limits are shown on the Dropout Voltage

curve.

Note 6: For LT1083 IFULL_LOAD is 5A for – 55°C ≤ TJ < – 40°C and 7.5A for

TJ ≥ –40°C.

Note 7: 1.7V ≤ (VIN – VOUT) ≤ 25V for LT1084 at – 55°C ≤ TJ ≤ – 40°C.

Note 8: Dropout is 1.7V maximum for LT1084 at – 55°C ≤ TJ ≤ –40°C.

Note 9: The LT1083/LT1084/LT1085 regulators are tested and specified

under pulse load conditions such that TJ ≅ TA. The C-grade LT1083/

LT1084/LT1085 are 100% tested at 25°C.The I-grade LT1084/LT1085 are

guaranteed over the full –40°C to 125°C operating ambient temperature

range.

108345fg

5

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