LT3082

1

3082f

TYPICAL APPLICATION

DESCRIPTION

200mA Single Resistor Low

Dropout Linear Regulator

can be paralleled to increase output current or spread heat

in surface mounted boards. Architected as a precision

current source and voltage follower, this regulator benefits

many applications requiring high current, adjustability to

zero and no heat sink. The LT3082 withstands reverse

input voltages and reverse output-to-input voltages without

reverse-current flow.

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.

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.

Variable Output Voltage Battery Powered Supply

FEATURES

APPLICATIONS

n

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

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Output Adjustable to 0V

n

Stable with Minimum 2.2μF Ceramic Capacitors

n

Single Resistor Sets Output Voltage

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Initial Set Pin Current Accuracy: 1%

n

n

Reverse-Battery Protection

n

Reverse-Current Protection

n

<1mV Load Regulation Typical

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<0.001%/V Line Regulation Typical

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Current Limit and Thermal Shutdown Protection

n

Available in 8-Lead SOT-23, 3-Lead SOT-223 and

8-Lead 3mm × 3mm DFN Packages

n

All-Surface Mount Power Supply

n

Post Regulator for Switching Supplies

n

Low Parts Count Variable Voltage Supply

n

Low Output Voltage Supply

n

Battery Powered Regulator

SET Pin Current vs Temperature

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.

TEMPERATURE (°C)

–50

9.900

9.950

10.000

10.050

–25

0

25

50

100

75

125

10.100

9.925

9.975

10.025

10.075

150

3082 TA01b

3082 TA01a

IN

SET

OUT

+

–

LT3082

0.1μF

500k

1μF

10μA

9V

2.2μF