LT3082
200mA Single Resistor Low
Dropout Linear Regulator
FEATURES
DESCRIPTION
The LT®3082 is a 200mA low dropout linear regulator that
can be paralleled to increase output current or spread heat
in surface mounted boards. Architected as a precision
currentsourceandvoltagefollower, thisregulatorbenefits
many applications requiring high current, adjustability to
zero and no heat sink. The LT3082 withstands reverse
inputvoltagesandreverseoutput-to-inputvoltageswithout
reverse-current flow.
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Outputs May Be Paralleled for Higher Output
Current or Heat Spreading
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Maximum Output Current: 200mA
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Wide Input Voltage Range: 1.2V to 40V
Output Adjustable to 0V
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Stable with Minimum 2.2μF Ceramic Capacitors
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Single Resistor Sets Output Voltage
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Initial Set Pin Current Accuracy: 1%
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Low Output Noise: 33μV
(10Hz to 100kHz)
RMS
A key feature of the LT3082 is the capability to supply a
wide output voltage range. A precision “0” TC 10μA ref-
erence current source drives a single resistor to program
the output voltage to any level between zero and 38.5V.
The LT3082 is stable with only 2.2μF of capacitance on
the output; the IC uses small ceramic capacitors that
do not require additional ESR as is common with other
regulators.
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Reverse-Battery Protection
Reverse-Current Protection
<1mV Load Regulation Typical
<0.001%/V Line Regulation Typical
Current Limit and Thermal Shutdown Protection
Available in 8-Lead SOT-23, 3-Lead SOT-223 and
8-Lead 3mm × 3mm DFN Packages
APPLICATIONS
Internal protection circuitry includes reverse-battery and
reverse-current protection, current limiting and ther-
mal limiting. The LT3082 is offered in the thermally en-
hanced 8-lead TSOT-23, 3-lead SOT-223 and 8-lead 3mm
× 3mm DFN packages.
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All-Surface Mount Power Supply
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Post Regulator for Switching Supplies
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Low Parts Count Variable Voltage Supply
Low Output Voltage Supply
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L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
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Battery Powered Regulator
TYPICAL APPLICATION
SET Pin Current vs Temperature
10.100
10.075
10.050
10.025
10.000
9.975
Variable Output Voltage Battery Powered Supply
LT3082
IN
9V
1μF
10μA
+
–
9.950
SET
OUT
C
V
= 10μA • R
SET
OUT
9.925
R
C
SET
OUT
SET
500k
2.2μF
0.1μF
9.900
–50 –25
25 50 75 100 125 150
0
TEMPERATURE (°C)
3082 TA01a
3082 TA01b
3082f
1