5

LT1584/LT1585/LT1587

158457a

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Thermal Regulation

LT1584/5/7

LT1584/5/7-3.3

LT1584/5-3.38

LT1584/5/7-3.6

0.004

0.02

%/W

Temperature Stability

q

0.5

%

Long-Term Stability

0.03

1.0

%

RMS Output Noise

0.003

%

Thermal Resistance

LT1584

T Package: Control Circuitry/Power Transistor

0.65/2.7

°C/W

Junction to Case

LT1585

T Package: Control Circuitry/Power Transistor

0.7/3.0

°C/W

LT1585

M Package: Control Circuitry/Power Transistor

0.7/3.0

°C/W

LT1587

T Package: Control Circuitry/Power Transistor

0.7/3.0

°C/W

LT1587

M Package: Control Circuitry/Power Transistor

0.7/3.0

°C/W

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

voltage range.

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.

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