Datasheet

LT3504
16
3504fa
For more information www.linear.com/LT3504
Figure 6. Transient Load Response of the LT3504 with Different Output Capacitors as the
Load Current Is Stepped from 500mA to 1A. V
IN
= 12V, V
OUT
= 3.3V, L = 10µH, R
T
= 18.2k
10µF
31.6k
10k
I
OUT
1A/DIV
V
OUT
20mV/DIV
I
OUT
1A/DIV
V
OUT
20mV/DIV
20µs/DIV
20µs/DIV
I
OUT
1A/DIV
V
OUT
20mV/DIV
20µs/DIV
V
OUT
3504 F06a
3504 F06b
3504 F06c
V
OUT
31.6k
10k
10µF
×2
100pF
31.6k
10k
V
OUT
+
22µF
FB
LT3504
FB
LT3504
FB
LT3504
applicaTions inForMaTion
Figure 7. Diode D4 Prevents a Shorted Input from Discharging a Backup Battery Tied to the Output;
It Also Protects the Circuit from a Reversed Input. The LT3504 Runs Only When the Input Is Present
3504 F07
D4
V
IN
V
OUT
BACKUP
GND
LT3504
SW1
DA1
FB1
EN/UVLO
SKY
SW5
V
IN
V
IN
RUN/SS1
RT/SYNC