LT1086_04 Datasheet, PDF (1/16 Pages) Linear Technology – 1.5A Low Dropout Positive Regulators Adjustable and Fixed 2.85V, 3.3V, 3.6V, 5V, 12V

LT1086 Series
1.5A Low Dropout Positive
Regulators Adjustable and
Fixed 2.85V, 3.3V, 3.6V, 5V, 12V
FEATURES
s _{3-Terminal Adjustable or Fixed}
2.85V, 3.3V, 3.6V, 5V, 12V
s _{Output Current of 1.5A (0.5A for LT1086H)}
s _{Operates Down to 1V Dropout}
s _{Guaranteed Dropout Voltage at Multiple Current Levels}
s _{Line Regulation: 0.015%}
s _{Load Regulation: 0.1%}
s _{100% Thermal Limit Functional Test}
s _{Ripple Rejection >75dB}
s _{Available in 3-Pin TO-220 and 3-Pin DD Packages}
U
APPLICATIO S
s _{SCSI-2 Active Terminator}
s _{High Efficiency Linear Regulators}
s _{Post Regulators for Switching Supplies}
s _{Constant Current Regulators}
s _{Battery Chargers}
s _{Microprocessor Supply}
DESCRIPTIO
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 refer-
ence/ouput voltage to 1%. Current limit is also trimmed,
minimizing the stress on both the regulator and power
source circuitry under overload conditions.
The LT1086 is pin compatible with older 3-terminal adjust-
able regulators. A minimum 10µF output capacitor is
required on these devices.
The LT1086 offers excellent line and load regulation speci-
fications 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.
TYPICAL APPLICATIO
5V to 3.3V Regulator
V_IN ≥ 4.75V
IN
10µF*
TANTALUM
LT1086-3.3 OUT
GND
3.3V AT 1.5A
10µF
TANTALUM
LT1086 • TA01
*MAY BE OMITTED IF INPUT SUPPLY IS WELL
BYPASSED WITHIN 2" OF THE LT1086
LT1086 Dropout Voltage
2
INDICATES GUARANTEED TEST POINT
–55°C ≤ T_J ≤ 150°C
0°C ≤ T_J ≤ 125°C
1
T_J = – 55°C
T_J = 25°C
T_J = 150°C
0
0
0.5
1
1.5
OUTPUT CURRENT (A)
LT1086 • TA02
sn1086 1086ffs
1