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LD1086V120
1.5A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
1/21February 2005 TYPICAL DROPOUT 1.3V AT 1.5A 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
1.5A 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, D2 PAK, 2 PAK/A, DPAK PINOUT COMPATIBILITY WITH STANDARD
ADJUSTABLE VREG
DESCRIPTIONThe LD1086 is a LOW DROP Voltage Regulator
able to provide up to 1.5A of Output Current.
Dropout is guaranteed at a maximum of 1.2V at
the maximum output current, decreasing at lower
loads. The LD1086 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 LD1086 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, D2 PAK, D2 PAK/A
and DPAK. On chip trimming allows the regulator
to reach a very tight output voltage tolerance,
within ±1% at 25°C.
Table 1: Order Codes (*) Available in Tape & Reel with the suffix "TR".
LD1086
SERIES1.5A LOW DROP POSITIVE VOLTAGE
REGULATOR ADJUSTABLE AND FIXED
Rev. 13
LD1086 SERIES2/21
Figure 1: Pin Connection (top view)
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.
Table 3: Thermal Data
Figure 2: Application Circuits
LD1086 SERIES3/21
Figure 3: Schematic Diagram
Table 4: Electrical Characteristics Of LD1086#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.
LD1086 SERIES4/21
Table 5: Electrical Characteristics Of LD1086#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 LD1086#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.
LD1086 SERIES5/21
Table 7: Electrical Characteristics Of LD1086#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 LD1086#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.
LD1086 SERIES6/21
Table 9: Electrical Characteristics Of LD1086#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 LD1086#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.
LD1086 SERIES7/21
Table 11: Electrical Characteristics Of LD1086#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 LD1086#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.
LD1086 SERIES8/21
Table 13: Electrical Characteristics Of LD1086#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 LD1086# (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.
LD1086 SERIES9/21
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 LD1086 SERIES10/21
Figure 10: Dropout Voltage vs Temperature
Figure 11: Dropout Voltage vs Output Current
Figure 12: Adjust Pin Current vs Input Voltage
Figure 13: Adjust Pin Current vs Temperature
Figure 14: Adjust Pin Current vs Output Current
Figure 15: Quiescent Current vs Output Current
LD1086 SERIES11/21
Figure 16: Quiescent Current vs Input Voltage
Figure 17: Supply Voltage Rejection vs Output Current
Figure 18: Supply Voltage Rejection vs Frequency
Figure 19: Supply Voltage Rejection vs Temperature
Figure 20: Minimum Load Current vs Temperature
Figure 21: Stability for Adjustable
