TL-SCSI285

FIXED-VOLTAGE REGULATORS

FOR SCSI ACTIVE TERMINATION

SLVS065F – NOVEMBER 1991 – REVISED JULY 1999

3

POST OFFICE BOX 655303

PARAMETER

TEST CONDITIONS†

TL-SCSI285PW

UNIT

PARAMETER

TEST CONDITIONS†

MIN

TYP

MAX

UNIT

Output voltage

IO =20mAto500 mA

VI =3 55Vto5 5V

TJ = 25°C

2.82

2.85

2.88

V

Output voltage

IO = 20 mA to 500 mA,

VI = 3.55 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 500 mA

5

30

mV

Output noise voltage

f = 10 Hz to 100 kHz

500

µV

Dropout voltage

IO = 500 mA

0.7

V

IO = 0

2

5

Bias current

IO = 27 mA, equivalent 1 line asserted

3

6

mA

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

26

49

† 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.

PARAMETER

TEST CONDITIONS†

TL-SCSI285Y

UNIT

PARAMETER

TEST CONDITIONS†

MIN

TYP

MAX

UNIT

Output voltage

IO = 20 mA to 500 mA,

VI = 3.55 V to 5.5 V

2.85

V

Input regulation

VI = 3.55 V to 5.5 V

5

mV

Ripple rejection

f = 120 Hz,

Vripple = 1 VO(PP)

–62

dB

Output regulation

IO = 20 mA to 620 mA

5

mV

Output regulation

IO = 20 mA to 500 mA

5

mV

Output noise voltage

f = 10 Hz to 100 kHz

500

µV

IO = 0

2

Bias current

IO = 27 mA, equivalent 1 line asserted

3

mA

Bias current

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

26

mA

IO = 620 mA

37

† 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.