LTC3107
19
3107f
For more information www.linear.com/LTC3107
Figure 4. Example Component Placement for Two Layer PC Board
Due to the very low input voltage the circuit may operate
from, the connections to V
IN
, the primary of the transformer
and the SW and GND pins of the LTC3107 should be
designed to minimize voltage drop from stray resistance,
and able to carry currents as high as 500mA. Any small
voltage drop in the primary winding conduction path will
lower efficiency, as well as the minimum start-up voltage.
applicaTions inForMaTion
Also, due to the low charge currents available at the out-
puts of the LTC3107, any sources of leakage current on
the output voltage
pins must be minimized. An example
board layout is shown in Figure 4.
V
OUT
V
IN
V
BAT
GND
GND
VLDO
VSTORE VAUX
BAT_OFF
