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LD1086V120STN/a72avai1.5A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS


LD1086V120 ,1.5A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORSLD1086SERIES1.5A LOW DROP POSITIVE VOLTAGEREGULATOR ADJUSTABLE AND FIXED  TYPICAL DROPOUT 1.3V AT ..
LD1086V18 ,1.5A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORSLD1086SERIES1.5A LOW DROP POSITIVE VOLTAGEREGULATOR ADJUSTABLE AND FIXED■ TYPICAL DROPOUT 1.3V AT 1 ..
LD1086V25 ,1.5A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORSLD1086SERIES1.5A LOW DROP POSITIVE VOLTAGEREGULATOR ADJUSTABLE AND FIXED■ TYPICAL DROPOUT 1.3V AT 1 ..
LD1086V33 ,1.5V LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORSAbsolute Maximum Ratings are those values beyond which damage to the device may occur. Functional o ..
LD1086V50 ,1.5A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORSELECTRICAL CHARACTERISTICS OF LD1086#18 (V =4.8V, C =C =10μF, T = -40 to 125°C, unlessI I O Aotherw ..
LD1086V80 ,1.5A 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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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
DESCRIPTION

The 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
SERIES

1.5A LOW DROP POSITIVE VOLTAGE
REGULATOR ADJUSTABLE AND FIXED
Rev. 13
LD1086 SERIES
2/21
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 SERIES
3/21
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 SERIES
4/21
Table 5: Electrical Characteristics Of LD1086#18 (V
I =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 SERIES
5/21
Table 7: Electrical Characteristics Of LD1086#285 (V
I =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 SERIES
6/21
Table 9: Electrical Characteristics Of LD1086#36 (V
I =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 SERIES
7/21
Table 11: Electrical Characteristics Of LD1086#80 (V
I =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 SERIES
8/21
Table 13: Electrical Characteristics Of LD1086#12 (V
I =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 SERIES
9/21
TYPICAL CHARACTERISTICS (unless otherwise specified T
j = 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 SERIES
10/21
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 SERIES
11/21
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


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