LT3082
200mA Single Resistor Low
Dropout Linear Regulator
FEATURES DESCRIPTION
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Outputs May Be Paralleled for Higher Output
The LT 3082 is a 200mA low dropout linear regulator that
Current or Heat Spreading
can be paralleled to increase output current or spread heat
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Maximum Output Current: 200mA
in surface mounted boards. Architected as a precision
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Wide Input Voltage Range: 1.2V to 40V
current source and voltage follower, this regulator bene ts
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Output Adjustable to 0V
many applications requiring high current, adjustability to
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Stable with Minimum 2.2F Ceramic Capacitors
zero and no heat sink. The LT3082 withstands reverse
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Single Resistor Sets Output Voltage
input voltages and reverse output-to-input voltages without
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Initial Set Pin Current Accuracy: 1%
reverse-current ow.
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Low Output Noise: 33V (10Hz to 100kHz)
RMS
A key feature of the LT3082 is the capability to supply a
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Reverse-Battery Protection
wide output voltage range. A precision 0 TC 10A ref-
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Reverse-Current Protection
erence current source drives a single resistor to program
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<1mV Load Regulation Typical
the output voltage to any level between zero and 38.5V.
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<0.001%/V Line Regulation Typical
The LT3082 is stable with only 2.2F of capacitance on
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Current Limit and Thermal Shutdown Protection
the output; the IC uses small ceramic capacitors that
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Available in 8-Lead SOT-23, 3-Lead SOT-223 and
do not require additional ESR as is common with other
8-Lead 3mm 3mm DFN Packages
regulators.
APPLICATIONS
Internal protection circuitry includes reverse-battery and
reverse-current protection, current limiting and ther-
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All-Surface Mount Power Supply
mal limiting. The LT3082 is offered in the thermally en-
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Post Regulator for Switching Supplies
hanced 8-lead TSOT-23, 3-lead SOT-223 and 8-lead 3mm
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Low Parts Count Variable Voltage Supply
3mm DFN packages.
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Low Output Voltage Supply
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
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Battery Powered Regulator
Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
SET Pin Current vs Temperature
10.100
Variable Output Voltage Battery Powered Supply
10.075
LT3082
IN
10.050
9V
1F
10A
10.025
+
10.000
9.975
SET OUT 9.950
V = 10A R
OUT SET
9.925
R
C
C SET
SET OUT
500k
2.2F
0.1F
9.900
50 25 0 25 50 75 100 125 150
TEMPERATURE (C)
3082 TA01a
3082 TA01b
3082f
1
SET PIN CURRENT (A)LT3082
ABSOLUTE MAXIMUM RATINGS (Note 1) All Voltages Relative to V
OUT
IN Pin Voltage Relative to SET, OUT ........................40V Operating Junction Temperature Range (Notes 2, 8)
SET Pin Current (Note 6) .....................................15mA E, I Grades ......................................... 40C to 125C
SET Pin Voltage (Relative to OUT, Note 6) ...............10V MP Grade ........................................... 55C to 125C
Output Short-Circuit Duration .......................... Inde nite Storage Temperature Range ................... 65C to 150C
Lead Temperature (ST, TS8 Packages Only)
Soldering, 10 sec .............................................. 300C
PIN CONFIGURATION
TOP VIEW
TOP VIEW
3 IN
TOP VIEW
OUT 1 8 IN
NC 1 8 IN
OUT 2 7 IN
TAB IS OUT
2 OUT
9
OUT 2 7 IN
NC 3 6 NC
OUT 3 6 NC
SET NC
4 5
1 SET
OUT 4 5 SET
ST PACKAGE
TS8 PACKAGE
DD PACKAGE
3-LEAD PLASTIC SOT-223
8-LEAD PLASTIC TSOT-23
8-LEAD (3mm s 3mm) PLASTIC DFN
T = 125C, = 24C/W, = 15C/W T = 125C, = 57C/W, = 15C/W
JMAX JA JC JMAX JA JC
T = 125C, = 28C/W, = 3C/W
JMAX JA JC
TAB IS OUT, MUST BE SOLDERED TO OUT ON THE PCB;
EXPOSED PAD (PIN 9) IS OUT, MUST BE SOLDERED TO OUT ON
SEE THE APPLICATIONS INFORMATION SECTION
THE PCB; SEE THE APPLICATIONS INFORMATION SECTION
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3082EDD#PBF LT3082EDD#TRPBF LDYT 40C to 125C
8-Lead (3mm 3mm) Plastic DFN
LT3082IDD#PBF LT3082IDD#TRPBF LDYT 40C to 125C
8-Lead (3mm 3mm) Plastic DFN
LT3082EST#PBF LT3082EST#TRPBF 3082 3-Lead Plastic SOT-223 40C to 125C
LT3082IST#PBF LT3082IST#TRPBF 3082 3-Lead Plastic SOT-223 40C to 125C
LT3082MPST#PBF LT3082MPST#TRPBF 3082MP 3-Lead Plastic SOT-223 55C to 125C
LT3082ETS8#PBF LT3082ETS8#TRPBF LTDYV 8-Lead Plastic SOT-23 40C to 125C
LT3082ITS8#PBF LT3082ITS8#TRPBF LTDYV 8-Lead Plastic SOT-23 40C to 125C
LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3082EDD LT3082EDD#TR LDYT 8-Lead (3mm 3mm) Plastic DFN 40C to 125C
LT3082IDD LT3082IDD#TR LDYT 8-Lead (3mm 3mm) Plastic DFN 40C to 125C
LT3082EST LT3082EST#TR 3082 3-Lead Plastic SOT-223 40C to 125C
LT3082IST LT3082IST#TR 3082 3-Lead Plastic SOT-223 40C to 125C
LT3082MPST LT3082MPST#TR 3082MP 3-Lead Plastic SOT-223 55C to 125C
LT3082ETS8 LT3082ETS8#TR LTDYV 8-Lead Plastic SOT-23 40C to 125C
LT3082ITS8 LT3082ITS8#TR LTDYV 8-Lead Plastic SOT-23 40C to 125C
Consult LTC Marketing for parts speci ed with wider operating temperature ranges. *The temperature grade is identi ed by a label on the shipping container.
For more information on lead free part marking, go to: