LT1086 Series
1.5A Low Dropout Positive
Regulators Adjustable and
Fixed 2.85V 3.3V, 3.6V, 5V 12V
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FEATURES
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DESCRIPTIO
3-Terminal Adjustable or Fixed
2.85V, 3.3V, 3.6V, 5V, 12V
Output Current of 1.5A (0.5A for LT1086H)
Operates Down to 1V Dropout
Guaranteed Dropout Voltage at Multiple Current Levels
Line Regulation: 0.015%
Load Regulation: 0.1%
100% Thermal Limit Functional Test
Ripple Rejection >75dB
Available in 3-Pin TO-220 and 3-Pin DD Packages
The LT1086 is pin compatible with older 3-terminal adjustable regulators. A minimum 10µF output capacitor is
required on these devices.
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APPLICATIO S
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The LT ®1086 is designed to provide up to 1.5A output
current. All internal circuitry is designed to operate down
to 1V input-to-output differential and the dropout voltage
is fully specified as a function of load current. Dropout is
guaranteed at several operating points up to a maximum
of 1.5V at maximum output current. Dropout decreases at
lower load currents. On-chip trimming adjusts the reference/ouput voltage to 1%. Current limit is also trimmed,
minimizing the stress on both the regulator and power
source circuitry under overload conditions.
SCSI-2 Active Terminator
High Efficiency Linear Regulators
Post Regulators for Switching Supplies
Constant Current Regulators
Battery Chargers
Microprocessor Supply
The LT1086 offers excellent line and load regulation specifications and ripple rejection exceeds 75dB even at the
maximum load current of 1.5A. The LT1086 is floating
architecture with a composite NPN output stage. All of the
quiescent current and the drive current for the output
stage flows to the load increasing efficiency.
The LT1086 is available in a 3-pin TO-220 package and a
space-saving surface mountable 3-pin DD package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
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TYPICAL APPLICATIO
5V to 3.3V Regulator
VIN ≥ 4.75V
IN
LT1086-3.3 OUT
3.3V AT 1.5A
GND
10µF*
TANTALUM
10µF
TANTALUM
LT1086 • TA01
*MAY BE OMITTED IF INPUT SUPPLY IS WELL
BYPASSED WITHIN 2" OF THE LT1086
MINIMUM INPUT/OUTPUT DIFFERENTIAL (V)
LT1086 Dropout Voltage
2
INDICATES GUARANTEED TEST POINT
–55°C ≤ TJ ≤ 150°C
0°C ≤ TJ ≤ 125°C
1
TJ = – 55°C
TJ = 25°C
TJ = 150°C
0
0
1
0.5
OUTPUT CURRENT (A)
1.5
LT1086 • TA02
sn1086 1086ffs
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