Datasheet
LTC3731
24
3731fc
APPLICATIONS INFORMATION
which is less than one third of the normal, full load con-
ditions. Incidentally, since the load no longer dissipates
any power, total system power is decreased by over 90%.
Therefore, the system actually cools significantly during
a shorted condition!
PC Board Layout Checklist
When laying out the printed circuit board, the following
checklist should be used to ensure proper operation of
the IC. These items are also illustrated graphically in the
layout diagram of Figure 11. Check the following in the
PC layout:
+
R
IN
V
IN
V
OUT
C
IN
BOLD LINES INDICATE HIGH,
SWITCHING CURRENTS.
KEEP LINES TO A MINIMUM
LENGTH.
+
C
OUT
D3
D2
SW2
D1
L1
SW1
R
SENSE1
L2
R
SENSE2
L3
SW3
R
SENSE3
3731 F11
R
L
Figure 11. Branch Current Waveforms