1

LT1118/LT1118-2.5

LT1118-2.85/LT1118-5

1118fc

800mA, Source and Sink

Regulators Adjustable and

Fixed 2.5V, 2.85V, 5V Output

The LT

unique capability of maintaining output regulation while

sourcing or sinking load current. The 2.85V output voltage

regulator is ideal for use as a Boulay termination of up to

27 SCSI data lines. The regulator maintains regulation

while both sourcing and sinking current, enabling the use

of active negation drivers for improved noise immunity on

the data lines. Regulation of output voltage is maintained

for TERMPWR voltages as low as 4.0V. When unloaded,

quiescent supply current is a low 600

µA,allowingcontinu-

ous connection to the TERMPWR lines. An ultralow power

shutdown mode is also available on the SO-8 version. In

Shutdown the output is high impedance and supply cur-

rent drops to less than 10

µA.

Current limits in both sourcing and sinking modes, plus

on-chip thermal shutdown make the circuit tolerant of

output fault conditions.

The LT1118 is available in 3-lead SOT-223 and 8-lead SO

packages.

■

Active Negation SCSI Terminations

■

Regulates While Sourcing or Sinking Current

µA Quiescent Current

■

Ultralow Power Shutdown Mode

■

Fast Settling Time

Load Transient Response

1118 TA02.tif

0.2V

0V

– 0.2V

LT1118-2.85

GND

1118 TA01

IN

2.2

µF

5V

1

µF

CERAMIC

OUT

– 400mA

800mA

0mA

DESCRIPTIO

FEATURES

APPLICATIO S

TYPICAL APPLICATIO

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.