LT1584CT Ver la hoja de datos (PDF) - Linear Technology

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Fabricante

LT1584CT

7A, 4.6A, 3A Low Dropout Fast Response Positive Regulators Adjustable and Fixed

Linear Technology 

LT1584/LT1585/LT1587

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

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

PARAMETER

CONDITIONS

MIN

TYP MAX

Thermal Regulation

Temperature Stability

LT1584/5/7

TA = 25°C, 30ms pulse

LT1584/5/7-3.3 TA = 25°C, 30ms pulse

LT1584/5-3.38 TA = 25°C, 30ms pulse

LT1584/5/7-3.45 TA = 25°C, 30ms pulse

LT1584/5/7-3.6 TA = 25°C, 30ms pulse

0.004 0.02

q

0.5

Long-Term Stability

RMS Output Noise

(% of VOUT)

Thermal Resistance

Junction to Case

LT1584

LT1585

LT1585

LT1587

LT1587

TA = 125°C, 1000 Hrs.

TA = 25°C, 10Hz ≤ f ≤ 10kHz

T Package: Control Circuitry/Power Transistor

T Package: Control Circuitry/Power Transistor

M Package: Control Circuitry/Power Transistor

T Package: Control Circuitry/Power Transistor

M Package: Control Circuitry/Power Transistor

0.03 1.0

0.003

0.65/2.7

0.7/3.0

0.7/3.0

0.7/3.0

0.7/3.0

UNITS

%/W

%

%

%

°C/W

°C/W

°C/W

°C/W

°C/W

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

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 (25W for the LT1584 in T package, 26.5W for the LT1585 in T

package, 18W for the LT1587 in T package). Power dissipation is

determined by input/output differential and the output current. Guaranteed

maximum output power will not be available over the full input/output

voltage range.

Note 4: IFULL LOAD is defined as the maximum value of output load current

as a function of input-to-output voltage. IFULL LOAD is equal to 7A for the

LT1584, 4.6A at TJ ≥ 25°C and 4A at TJ < 25°C for the LT1585/LT1585-3.3

and 3A for the LT1587. The remaining LT1585 fixed voltage versions are

4A. The LT1585 and LT1587 have constant current limit with changes in

input-to-output voltage. The LT1584 has variable current limit which

decreases about 4A as input-to-output voltage increases from 3V to 7V.

158457a

5

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