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LD1085D2MST,STN/a12000avai3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
LD1085D2MSTN/a10000avai3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
LD1085D2MSTMN/a10000avai3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
LD1085D2M18TO-263N/a36avai3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
LD1085V25STN/a98avai3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
LD1085V36STN/a18avai3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
LD1085D2M25STN/a40avai3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
LD1085D2M5.0 |LD1085D2M50STN/a210avai3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
LD1085D2T18STN/a5000avai3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
LD1085D2T25STN/a15000avai3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
LD1085D2T33STN/a5000avai3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
LD1085D2T36STN/a2800avai3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
LD1085PSTN/a24000avai3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
LD1085VSTN/a5000avai3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
LD1085V18STN/a47000avai3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
LD1085D2T-R |LD1085D2TRSTN/a4800avai3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
LD1085V33STN/a150avai3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
LD1085V50STN/a1450avai3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
LD1085V90ST,STN/a10000avai3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
LD1085V90STMN/a10000avai3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
LD1085V90STN/a2550avai3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS


LD1085V18 ,3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORSELECTRICAL CHARACTERISTICS OF LD1085#25 (V =5.5V, C =C =10μF, T = -40 to 125°C, unlessI I O Aotherw ..
LD1085V25 ,3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORSAbsolute Maximum Ratings are those values beyond which damage to the device may occur. Functional o ..
LD1085V33 ,3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORSLD1085SERIES3A LOW DROP POSITIVE VOLTAGEREGULATOR ADJUSTABLE AND FIXED■ TYPICAL DROPOUT 1.3V (AT 3A ..
LD1085V36 ,3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORSELECTRICAL CHARACTERISTICS OF LD1085#18 (V =4.8V, C =C =10μF, T = -40 to 125°C, unlessI I O Aotherw ..
LD1085V50 ,3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORSAbsolute Maximum Ratings are those values beyond which damage to the device may occur. Functional o ..
LD1085V90 ,3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORSELECTRICAL CHARACTERISTICS OF LD1085#15 (V =4.5V, C =C =10μF, T = -40 to 125°C, unlessI I O Aotherw ..
LH5116HD-10 , CMOS 16K (2K x 8) Static RAM
LH5116N-10 , CMOS 16K (2K x 8) Static RAM
LH51256-10L , CMOS 256K (32K X 8) STATIC RAM
LH5164A , CMOS 64K (8K x 8) Static RAM
LH5164A-10LF , 64K Static RAM
LH5168D-80L , CMOS 64K (8LX8) STATIC RAM


LD1085D2M-LD1085D2M18-LD1085D2M25-LD1085D2M5.0-LD1085D2T18-LD1085D2T25-LD1085D2T33-LD1085D2T36-LD1085D2T-R-LD1085P-LD1085V-LD1085V18-LD1085V25-LD1085V33-LD1085V36-LD1085V50-LD1085V90
3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
1/19February 2003 TYPICAL DROPOUT 1.3V (AT 3A) THREE TERMINAL ADJUSTABLE OR FIXED
OUTPUT VOLTAGE 1.5V, 1.8V, 2.5V, 2.85V,
3.3V,3.6V, 5V,8V, 9V,12V. GUARANTEED OUTPUT CURRENT UP TO OUPUT TOLERANCE ±1%AT 25°C AND
±2%IN FULL TEMPERATURE RANGE INTERNAL POWER AND THERMAL LIMIT WIDE OPERATING TEMPERATURE RANGE
-40°C TO 125°C PACKAGE AVAILABLE: TO-220, TO-220FP2 PAK,D2 PAK/A PINOUT COMPATIBILITY WITH STANDARD
ADJUSTABLE VREG
DESCRIPTION

The LD1085isa LOW DROP Voltage Regulator
able to provide up to 3A of Output Current.
Dropoutis guaranteedata maximumof 1.5Vat
the maximum output current, decreasingat lower
loads. The LD1085is pinto pin compatible with
the older 3-terminal adjustable regulators, but has
better performancesin termof drop and output
tolerance. 2.85V output versionis suitable for SCSI-2
active termination. Unlike PNP regulators, where partof the output currentis wastedas quiescent
current, the LD1085 quiescent current flows into
the load, so increase efficiency. Onlya 10μF
minimum capacitoris need for stability.
The deviceis suppliedin TO-220, TO-220FP,2 PAK andD2 PAK/A. On chip trimming allows the
regulatorto reacha very tight output voltage
tolerance, within ±1%at 25°C.
LD1085
SERIES
LOW DROP POSITIVE VOLTAGE
REGULATOR ADJUSTABLE AND FIXED
SCHEMATIC DIAGRAM
LD1085 SERIES
2/19
ABSOLUTE MAXIMUM RATINGS

AbsoluteMaximum Ratingsare those values beyond which damagetothe device may occur. Functional operation under these conditionis
not implied.
THERMAL DATA
APPLICATION CIRCUITS
LD1085 SERIES
3/19
CONNECTION DIAGRAM
(top view)
ORDERING CODES

(*) Availablein Tape& Reel withthe suffix"R"for fixed versionand "-R"for adjustable version.
LD1085 SERIES
4/19
ELECTRICAL CHARACTERISTICS OF LD1085#15
(VI =4.5V,CI =CO =10μF,TA= -40to 125°C, unless
otherwise specified.)
NOTE1: See short-circuit current curvefor available output currentat fixed dropout.
ELECTRICAL CHARACTERISTICS OF LD1085#18
(VI =4.8V,CI =CO =10μF,TA= -40to 125°C, unless
otherwise specified.)
NOTE1: See short-circuit current curvefor available output currentat fixed dropout.
LD1085 SERIES
5/19
ELECTRICAL CHARACTERISTICS OF LD1085#25
(VI =5.5V,CI =CO =10μF,TA= -40to 125°C, unless
otherwise specified.)
NOTE1: See short-circuit current curvefor available output currentat fixed dropout.
ELECTRICAL CHARACTERISTICS OF LD1085#285
(VI =5.85V,CI =CO =10μF,TA= -40to 125°C,
unless otherwise specified.)
NOTE1: See short-circuit current curvefor available output currentat fixed dropout.
LD1085 SERIES
6/19
ELECTRICAL CHARACTERISTICS OF LD1085#33
(VI =6.3V,CI =CO =10μF,TA= -40to 125°C, unless
otherwise specified.)
NOTE1: See short-circuit current curvefor available output currentat fixed dropout.
ELECTRICAL CHARACTERISTICS OF LD1085#36
(VI=6.6V,CI =CO =10μF,TA= -40to 125°C, unless
otherwise specified.)
NOTE1: See short-circuit current curvefor available output currentat fixed dropout.
LD1085 SERIES
7/19
ELECTRICAL CHARACTERISTICS OF LD1085#50
(VI =8V,CI =CO =10μF,TA= -40to 125°C, unless
otherwise specified.)
NOTE1: See short-circuit current curvefor available output currentat fixed dropout.
ELECTRICAL CHARACTERISTICS OF LD1085#80
(VI=11V,CI =CO =10μF,TA= -40to 125°C, unless
otherwise specified.)
NOTE1: See short-circuit current curvefor available output currentat fixed dropout.
LD1085 SERIES
8/19
ELECTRICAL CHARACTERISTICS OF LD1085#90
(VI =12V,CI =CO =10μF,TA= -40to 125°C, unless
otherwise specified.)
NOTE1: See short-circuit current curvefor available output currentat fixed dropout.
ELECTRICAL CHARACTERISTICS OF LD1085#120
(VI=15V,CI =CO =10μF,TA= -40to 125°C, unless
otherwise specified.)
NOTE1: See short-circuit current curvefor available output currentat fixed dropout.
LD1085 SERIES
9/19
ELECTRICAL CHARACTERISTICS OF LD1085#
(VI =4.25V,CI =CO =10μF,TA= -40to 125°C, unless
otherwise specified.)
NOTE1: See short-circuit current curvefor available output currentat fixed dropout.
LD1085 SERIES
10/19
TYPICAL CHARACTERISTICS
(unless otherwise specifiedTj= 25°C,CI=CO =10μF)
Figure1:
Output Voltagevs Temperature
Figure2:
Output Voltagevs Temperature
Figure3:
Output Voltagevs Temperature
Figure4:
Short Circuit Currentvs Dropout
Voltage
Figure5:
Line Regulationvs Temperature
Figure6:
Load Regulationvs Temperature
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