TL-SCSI285

FIXED-VOLTAGE REGULATORS

FOR SCSI ACTIVE TERMINATION

SLVS065F – NOVEMBER 1991 – REVISED JULY 1999

2

POST OFFICE BOX 655303

absolute maximum ratings over operating virtual junction temperature range (unless otherwise

7.5 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–55

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Package thermal impedance,

22

°C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . .

PW package

83

°C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . .

Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds: KC or PW package

260

°C

. . . . . . . . . . . . .

–65

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES:

variations in individual device electrical characteristics and thermal resistance, the built-in thermal overload protection may be

activated at power levels slightly above or below the rated dissipation.

2. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace

length of zero.

recommended operating conditions

TL-SCSI285

UNIT

MIN

MAX

UNIT

Input voltage, VI

TJ = 25°C

V

Input voltage, VI

TJ = 0°C to 125°C

3.55

5.5

V

Output current IO

KC package

0

620

mA

Output current, IO

PW package

0

500

mA

Operating virtual junction temperature range, TJ

0

125

°C

PARAMETER

TEST CONDITIONS‡

TL-SCSI285KC

UNIT

PARAMETER

TEST CONDITIONS‡

MIN

TYP

MAX

UNIT

Output voltage

IO = 20 mA to 500 mA,

VI = 3.55 V to 5.5 V,

TJ = 25°C

2.82

2.85

2.88

V

Output voltage

IO = 500 mA to 620 mA,

VI = 3.65 V to 5.5 V,

TJ = 0 to 125°C

2.79

2.91

V

Input regulation

VI = 3.55 V to 5.5 V

5

15

mV

Ripple rejection

f = 120 Hz,

Vripple = 1 VO(PP)

–62

dB

Output regulation

IO = 20 mA to 620 mA

5

30

mV

Output regulation

IO = 20 mA to 500 mA

5

30

mV

Output noise voltage

f = 10 Hz to 100 kHz

500

µV

Dropout voltage

IO = 500 mA

0.7

V

Dropout voltage

IO = 620 mA

0.8

V

IO = 0

2

5

Bias current

IO = 27 mA, equivalent 1 line asserted

3

6

mA

Bias current

IO = 500 mA, equivalent 18 lines asserted (8-bit)

26

49

mA

IO = 620 mA

37

62

‡ Pulse-testing techniques are used to maintain the virtual junction temperature as close to the ambient temperature as possible. Thermal effects

must be taken into account separately. All characteristics are measured with a 0.1-

µF capacitor across the input and a 22.0-µF tantalum capacitor

with equivalent series resistance of 1.5

Ω on the output.