LD1085DT ,3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORSElectrical Characteristics Of LD1085#285 (V =5.85V, C = C =10µ F, T = -40 to 125°C, I I O Aunless o ..
LD1085DT15R ,3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORSElectrical Characteristics Of LD1085#15 (V =4.5V, C = C =10µ F, T = -40 to 125°C, unless I I O Aoth ..
LD1085P ,3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORSABSOLUTE MAXIMUM RATINGSSymbol Parameter² Value UnitV DC Input Voltage30 VII Output CurrentInternal ..
LD1085V ,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 ..
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 ..
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LD1085D2M18R-LD1085D2M-R-LD1085D2T15R-LD1085D2T18R-LD1085D2T18-R-LD1085D2T25R-LD1085D2T33R-LD1085DT-LD1085DT15R
3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
1/19March 2005 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-220FP 2 PAK, D2 PAK/A PINOUT COMPATIBILITY WITH STANDARD
ADJUSTABLE VREG
DESCRIPTION The LD1085 is a LOW DROP Voltage Regulator
able to provide up to 3A of Output Current.
Dropout is guaranteed at a maximum of 1.2V at
the maximum output current, decreasing at lower
loads. The LD1085 is pin to pin compatible with
the older 3-terminal adjustable regulators, but has
better performances in term of drop and output
tolerance.
A 2.85V output version is suitable for SCSI-2
active termination. Unlike PNP regulators, where
a part of the output current is wasted as quiescent
current, the LD1085 quiescent current flows into
the load, so increase efficiency. Only a 10µF
minimum capacitor is need for stability.
The device is supplied in TO-220, TO-220FP,2 PAK and D2 PAK/A. On chip trimming allows the
regulator to reach a very tight output voltage
tolerance, within ±1% at 25°C.
LD1085
SERIES3A LOW DROP POSITIVE VOLTAGE
REGULATOR ADJUSTABLE AND FIXED
Figure 1: Schematic DiagramRev. 14
LD1085 SERIES2/19
Figure 2: Pin Connection (top view)
Table 1: Order Codes (*) Available in Tape & Reel with the suffix "R" for fixed version and "-R" for adjustable version.
Table 2: Absolute Maximum Ratings Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied.
LD1085 SERIES3/19
Table 3: Thermal Data
Figure 3: Application Circuits
Table 4: Electrical Characteristics Of LD1085#15 (VI=4.5V, CI = CO =10µF, TA = -40 to 125°C, unless otherwise specified.)
NOTE 1: See short-circuit current curve for available output current at fixed dropout.
LD1085 SERIES4/19
Table 5: Electrical Characteristics Of LD1085#18 (VI =4.8V, CI = CO =10µF, TA = -40 to 125°C, unless
otherwise specified.)
NOTE 1: See short-circuit current curve for available output current at fixed dropout.
Table 6: Electrical Characteristics Of LD1085#25 (VI=5.5V, CI = CO =10µF, TA = -40 to 125°C, unless otherwise specified.)
NOTE 1: See short-circuit current curve for available output current at fixed dropout.
LD1085 SERIES5/19
Table 7: Electrical Characteristics Of LD1085#285 (VI =5.85V, CI = CO =10µF, TA = -40 to 125°C,
unless otherwise specified.)
NOTE 1: See short-circuit current curve for available output current at fixed dropout.
Table 8: Electrical Characteristics Of LD1085#33 (VI=6.3V, CI = CO =10µF, TA = -40 to 125°C, unless otherwise specified.)
NOTE 1: See short-circuit current curve for available output current at fixed dropout.
LD1085 SERIES6/19
Table 9: Electrical Characteristics Of LD1085#36 (VI =6.6V, CI = CO =10µF, TA = -40 to 125°C, unless
otherwise specified.)
NOTE 1: See short-circuit current curve for available output current at fixed dropout.
Table 10: Electrical Characteristics Of LD1085#50 (VI=8V, CI = CO =10µF, TA = -40 to 125°C, unless otherwise specified.)
NOTE 1: See short-circuit current curve for available output current at fixed dropout.
LD1085 SERIES7/19
Table 11: Electrical Characteristics Of LD1085#80 (VI =11V, CI = CO =10µF, TA = -40 to 125°C, unless
otherwise specified.)
NOTE 1: See short-circuit current curve for available output current at fixed dropout.
Table 12: Electrical Characteristics Of LD1085#90 (VI=12V, CI = CO =10µF, TA = -40 to 125°C, unless otherwise specified.)
NOTE 1: See short-circuit current curve for available output current at fixed dropout.
LD1085 SERIES8/19
Table 13: Electrical Characteristics Of LD1085#12 (VI =15V, CI = CO =10µF, TA = -40 to 125°C, unless
otherwise specified.)
NOTE 1: See short-circuit current curve for available output current at fixed dropout.
Table 14: Electrical Characteristics Of LD1085# (VI=4.25V, CI = CO =10µF, TA = -40 to 125°C, unless otherwise specified.)
NOTE 1: See short-circuit current curve for available output current at fixed dropout.
LD1085 SERIES9/19
TYPICAL CHARACTERISTICS (unless otherwise specified Tj = 25°C, CI=CO =10µF)
Figure 4: Output Voltage vs Temperature
Figure 5: Output Voltage vs Temperature
Figure 6: Output Voltage vs Temperature
Figure 7: Short Circuit Current vs Dropout Voltage
Figure 8: Line Regulation vs Temperature
Figure 9: Load Regulation vs Temperature LD1085 SERIES10/19
Figure 10: Dropout Voltage vs Temperature
Figure 11: Dropout Voltage vs Output Current
Figure 12: Adjust Pin Current vs Temperature
Figure 13: Quiescent Current vs Temperature
Figure 14: Dropout Voltage vs Output Current
Figure 15: Supply Voltage Rejection vs Output Current
