LT3082 Datasheet, PDF (1/20 Pages) Linear Technology – 200mA Single Resistor Low Dropout Linear Regulator

LT3082
200mA Single Resistor Low
Dropout Linear Regulator
FEATURES
n _{Outputs May Be Paralleled for Higher Output}
Current or Heat Spreading
n _{Maximum Output Current: 200mA}
n _{Wide Input Voltage Range: 1.2V to 40V}
n _{Output Adjustable to 0V}
n _{Stable with Minimum 2.2μF Ceramic Capacitors}
n _{Single Resistor Sets Output Voltage}
n _{Initial Set Pin Current Accuracy: 1%}
n _{Low Output Noise: 33μVRMS (10Hz to 100kHz)}
n _{Reverse-Battery Protection}
n _{Reverse-Current Protection}
n _{<1mV Load Regulation Typical}
n _{<0.001%/V Line Regulation Typical}
n _{Current Limit and Thermal Shutdown Protection}
n _{Available in 8-Lead SOT-23, 3-Lead SOT-223 and}
8-Lead 3mm × 3mm DFN Packages
APPLICATIONS
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}
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
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.
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.
TYPICAL APPLICATION
Variable Output Voltage Battery Powered Supply
IN
LT3082
9V
1μF
10μA
+
–
SET
C_SET
0.1μF
R_SET
500k
OUT
V_OUT = 10μA • R_SET
C_OUT
2.2μF
3082 TA01a
SET Pin Current vs Temperature
10.100
10.075
10.050
10.025
10.000
9.975
9.950
9.925
9.900
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3082 TA01b
3082f
1