Datasheet

LT3085
19
3085fb
TYPICAL APPLICATIONS
Adding Shutdown Low Dropout Voltage LED Driver
+
–
LT3085
IN
100mA
D1
V
CONTROL
OUT
V
IN
3085 TA05
SET
R1
24.9k
R2
2.49Ω
C1
+
–
LT3085
IN
V
IN
V
CONTROL
OUT
V
OUT
3085 TA04
SET
R1
ON OFF
SHUTDOWN
Q1
VN2222LL
Q2*
VN2222LL
Q2 INSURES ZERO OUTPUT
IN THE ABSENCE OF ANY
OUTPUT LOAD.
*
Using a Lower Value SET Resistor
+
–
LT3085
IN
1mA
V
IN
12V
V
CONTROL
OUT
C
OUT
4.7μF
V
OUT
0.5V TO 10V
3085 TA06
SET
R1
49.9k
1%
R
SET
10k
R2
499Ω
1%
C1
1μF
V
OUT
= 0.5V + 1mA • R
SET