Datasheet

LP3853, LP3856
SNVS173G –FEBRUARY 2003–REVISED APRIL 2013 www.ti.com
Figure 30. Error Flag Operation
SENSE PIN
In applications where the regulator output is not very close to the load, LP3856 can provide better remote load
regulation using the SENSE pin. Figure 31 depicts the advantage of the SENSE option. LP3853 regulates the
voltage at the output pin. Hence, the voltage at the remote load will be the regulator output voltage minus the
drop across the trace resistance. For example, in the case of a 3.3V output, if the trace resistance is 100mΩ, the
voltage at the remote load will be 3V with 3A of load current, I
LOAD
. The LP3856 regulates the voltage at the
sense pin. Connecting the sense pin to the remote load will provide regulation at the remote load, as shown in
Figure 31. If the sense option pin is not required, the sense pin must be connected to the V
OUT
pin.
Figure 31. Improving remote load regulation using LP3856
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