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PDF REG1118-2.85 Data sheet ( Hoja de datos )
| Número de pieza | REG1118-2.85 | |
| Descripción | 800mA Low Dropout Positive Regulator with Current Source and Sink Capability | |
| Fabricantes | Burr-Brown Corporation | |
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®
REG1118
REG1118
800mA Low Dropout Positive Regulator
with Current Source and Sink Capability
FEATURES
q SOURCES 800mA, SINKS 400mA
q 2.85V OUTPUT FOR SCSI ACTIVE
NEGATION TERMINATION
q 1.3V max DROPOUT VOLTAGE AT
IO = 800mA
q INTERNAL CURRENT LIMIT
q THERMAL OVERLOAD PROTECTION
q SOT-223 SURFACE MOUNT PACKAGE
APPLICATIONS
q SCSI-2 AND SCSI-3 DEVICES
q FAST-20 SCSI
q ACTIVE NEGATION SCSI TERMINATORS
q SUPPLY SPLITTER GROUND GENERATION
DESCRIPTION
The REG1118-2.85 is a three-terminal voltage regula-
tors capable of sourcing up to 800mA and sinking up
to 400mA. The sinking capability is important in SCSI
applications where active negation line drivers are
used. The REG1118-2.85 is useful for making a
27-line Boulay terminator capable of interfacing with
active negation drivers required in FAST-20 SCSI
applications. The regulator has active current limits
for both sink and source currents as well as internal
thermal limiting.
Laser trimming assures excellent output voltage accu-
racy. An NPN output stage allows output stage drive
current to contribute to the source load current for
maximum efficiency.
REG1118 is packaged in a SOT-223 surface-mount
package, suitable for reflow soldering techniques.
TERMPWR
10µF
REG1118
VIN VOUT
GND
4.7µF
110Ω
110Ω
110Ω
110Ω
Signal Line 1
Signal Line 2
Signal Line 3
Signal Line N
User Supplied
Resistor Network
REG1118-2.85 Used to Make Active Negation SCSI Terminator
Up To
27 Lines
InternationalAirportIndustrialPark • MailingAddress:POBox11400,Tucson,AZ85734 • StreetAddress:6730S.TucsonBlvd.,Tucson,AZ 85706 • Tel:(520)746-1111 • Twx:910-952-1111
Internet:http://www.burr-brown.com/ • FAXLine:(800)548-6133(US/CanadaOnly) • Cable:BBRCORP • Telex:066-6491 • FAX:(520)889-1510 • ImmediateProductInfo:(800)548-6132
©1996 Burr-Brown Corporation
PDS-1352B
Printed in U.S.A. January, 1997
1 page  
TERMPWR
5V
1N5817
2.85V
REG1118-2.85
10µF
4.7µF
110Ω
110Ω
(Up to 27 Lines)
110Ω
TERMPWR
2.85V
REG1118-2.85
1N5817
5V
10µF
4.7µF
110Ω
FIGURE 3. SCSI Active Termination Configuration.
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user's own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.
®
5 REG1118
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