Datasheet

LT3508
22
3508fd
TYPICAL APPLICATIONS
1MHz, 5V and 12V Outputs
V
IN
14V TO 36V
BOOST2
LT3508
V
IN2
V
IN1
SHDN
GND
3508 TA06
RT/SYNC
C7
100pF
C5
10µF
C4
4.7µF
C1
4.7µF
C2
0.1µF
C3
0.1µF
D4
ON OFF
R6
39k
C6
100pF
R5
43k
R7
10.7k
R9
33.2k
f
SW
= 1MHz
R1 154k
R2 1k
R8
100k
C1 TO C5: X5R OR X7R
D1, D2: MMSD4148
D3: DIODES INC. B240A
D4: DIODES INC. B140
R2: USE 0.25W RESISTOR. FOR CONTINUOUS OPERATION
ABOVE 30V, USE TWO 2k, 0.25W RESISTORS IN PARALLEL
*DERATE OUTPUT CURRENT AT HIGHER AMBIENT TEMPERATURES
AND INPUT VOLTAGES TO MAINTAIN JUNCTION TEMPERATURE
BELOW THE ABSOLUTE MAXIMUM
R3
56.2k
R4
11.0k
L2 6.8µH
D2
L1 15µH
D1
D3
POWER
GOOD
OUT2
5V
1.4A*
OUT1
12V
1.4A*
OUT2
C8
1nF
BOOST1
SW2
SW1
FB2FB1
V
C2
PG1
V
C1
TRACK/SS1
PG2TRACK/SS2