Datasheet

LT3504
21
3504fa
For more information www.linear.com/LT3504
applicaTions inForMaTion
Figure 11. FQB34N20L Transient Thermal Response
Figure 12. Figure 9’s Start-Up Behavior Figure 13. Figure 9’s Dropout Performance
3504 F11
Z
θJC
(t), THERMAL RESPONSE (°C/W)
Z
θJC
(t) = 0.7°C/W MAX
DUTY FACTOR = D = t
1
/t
2
T
JM
– T
C
= P
DM
• Z
θJC
(t)
t
1
, SQUARE WAVE PULSE DURATION (s)
1010
–5
1
10
–3
10
–4
10
–3
0.01
0.1 1
0.01
0.1
D = 0.5
D = 0.2
D = 0.1
D = 0.05
D = 0.02
D = 0.01
SINGLE PULSE
P
DM
t
1
t
2
3504 F12
20ms/DIV
SKY
2V/DIV
V
SUPPLY
2V/DIV
V
IN
2V/DIV
3504 F13
100ms/DIV
V
OUT2
1V/DIV
V
OUT3
1V/DIV
V
OUT4
1V/DIV
V
OUT1
1V/DIV
V
IN
50V/DIV