LT3081
22
3081fc
For more information www.linear.com/LT3081
applicaTions inForMaTion
Typical applicaTions
Paralleling Regulators Using I
MON
Cancels Ballast Resistor Drop
IN
SET
R
SET
30.1k
1k
TEMP
I
MON
I
LIM
10mΩ
OUT
+
–
LT3081
I
SET
50µA
V
OUT
3V
3A
V
IN
IN
SET
1k
TEMP
I
MON
I
LIM
10mΩ
OUT
+
–
LT3081
I
SET
50µA
3.01k
3081 TA03
1k
IN
SET
R
SET
15k
1k
TEMP
I
MON
I
LIM
OUT
+
–
LT3081
I
SET
50µA
V
OUT
1.5V
3A
V
IN
IN
SET
1k
TEMP
I
MON
I
LIM
R
BALLAST
10mΩ
OUT
+
–
LT3081
I
SET
50µA
3081 TA04
R
COMP
25Ω
R
BALLAST
10mΩ
The LT3081’s IN pin withstands ±40V voltages with respect
to the OUT and SET pins. Reverse current flow, if OUT is
greater than IN, is less than 1mA (typically under 100µA),
protecting the LT3081 and sensitive loads.
Clamping diodes and 400Ω limiting resistors protect the
LT3081’s SET pin relative to the OUT pin voltage. These
protection components typically only carry current under
transient overload conditions. These devices are sized to
handle ±10V differential voltages and ±25mA crosspin
current flow without concern. Relative to these applica
-
tion concerns
,
note the following two scenarios. The first
scenario employs
a noise-reducing SET pin bypass ca-
pacitor while OUT is instantaneously shorted to GND. The
second
scenario follows improper shutdown techniques
in which the SET pin is reset to GND quickly while OUT
is held up by a large output capacitance with light load.
