LT1118/LT1118-2.5
LT1118-2.85/LT1118-5
Low I , Low Dropout,
Q
800mA, Source and Sink
Regulators Adjustable and
Fixed 2.5V, 2.85V, 5V Output
DESCRIPTION
FEATURES
The LT®1118 family of low dropout regulators has the
unique capability of maintaining output regulation while
sourcingorsinkingloadcurrent. The2.85Voutputvoltage
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,
quiescentsupplycurrentisalow600μA,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 10μA.
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Regulates While Sourcing or Sinking Current
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Provides Termination for up to 27 SCSI Lines
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600μA Quiescent Current
Ultralow Power Shutdown Mode
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Current Limit and Thermal Shutdown Protection
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Stable for Any C
≥ 0.22μF
LOAD
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Fast Settling Time
1V Dropout Voltage
APPLICATIONS
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Active Negation SCSI Terminations
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Computers
Disk Drives
CD-ROM
Supply Splitter
Current limits in both sourcing and sinking modes, plus
on-chip thermal shutdown make the circuit tolerant of
output fault conditions.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
The LT1118 is available in 3-lead SOT-223 and 8-lead SO
packages.
TYPICAL APPLICATION
Load Transient Response
0.2V
LT1118-2.85 OUT
GND
IN
0V
$V
OUT
–0.2V
1μF
CERAMIC
5V
2.2μF
800mA
I
LOAD
I
LOAD
1118 TA01
0mA
–400mA
1118 TA02
1118fd
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