LT1118/ LT1118-2.5
LT1118-2.85/ LT1118-5
Lo w I , Lo w Dro p o ut,
Q
800m A, So urc e a nd Sink
Re g ula to rs Ad justa b le a nd
Fixe d 2.5V, 2.85V, 5V Outp ut
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FEATURES
DESCRIPTION
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,
quiescentsupplycurrentis alow600µA,allowingcontinu-
ous connection to the TERMPWR lines. An ultralowpower
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
Provides Termination for up to 27 SCSI Lines
600µA Quiescent Current
Ultra-Low Power Shutdown Mode
Current Limit and Thermal Shutdown Protection
Stable for Any CLOAD ≥ 0.22µF
Fast Settling Time
1V Dropout Voltage
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APPLICATIONS
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Active Negation SCSI Terminations
Computers
Disk Drives
CD-ROM
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Current limits in both sourcing and sinking modes, plus
on-chip thermal shutdown make the circuit tolerant of
output fault conditions.
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Supply Splitter
The LT1118 is available in 3-lead SOT-223 and 8-lead SO
packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
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TYPICAL APPLICATION
Load Transient Response
0.2V
0V
LT1118-2.85 OUT
GND
∆VOUT
IN
–0.2V
1µF
CERAMIC
800mA
5V
2.2µF
I
LOAD
ILOAD
1118 TA01
0mA
–400mA
1118 TA02.tif
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