LT1118 Datasheet, PDF (1/8 Pages) Linear Technology – Low IQ, Low Dropout, 800mA, Source and Sink Regulators Adjustable and Fixed 2.5V, 2.85V, 5V Output

FEATURES
s _{Regulates While Sourcing or Sinking Current}
s _{Provides Termination for up to 27 SCSI Lines}
s _{600µA Quiescent Current}
s _{Ultra-Low Power Shutdown Mode}
s _{Current Limit and Thermal Shutdown Protection}
s _{Stable for Any CLOAD ≥ 0.22µF}
s _{Fast Settling Time}
s _{1V Dropout Voltage}
U
APPLICATIONS
s _{Active Negation SCSI Terminations}
s _Computers
s _{Disk Drives}
s _CD-ROM
s _{Supply Splitter}
LT1118/LT1118-2.5
LT1118-2.85/LT1118-5
Low I_Q, Low Dropout,
800mA, Source and Sink
Regulators Adjustable and
Fixed 2.5V, 2.85V, 5V Output
DESCRIPTION
The LT^®1118 family of low dropout regulators has the
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 600µA, allowing continu-
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.
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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
IN LT1118-2.85 OUT
GND
5V
2.2µF
1µF
CERAMIC
Load Transient Response
I_LOAD
1118 TA01
∆V_OUT
0.2V
0V
– 0.2V
800mA
I_LOAD
0mA
– 400mA
1118 TA02.tif
1