LP3961_15 Datasheet, PDF (12/31 Pages) Texas Instruments – LP396x 800-mA Fast Ultra-Low-Dropout Linear Regulators

LP3961, LP3964
SNVS056J – MAY 2000 – REVISED JUNE 2015
Feature Description (continued)
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Figure 20. ERROR Flag Operation
7.3.3 SENSE Pin
In applications where the regulator output is not very close to the load, LP3964 can provide better remote load
regulation using the SENSE pin. Figure 21 depicts the advantage of the SENSE option. LP3961 regulates the
voltage at the OUT 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 3.3-V output, if the trace resistance is 100 mΩ, the
voltage at the remote load will be 3.22 V with 800 mA of load current, I_LOAD. The LP3964 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 21. If the sense option pin is not required, the SENSE pin must be connected to the OUT pin.
Figure 21. Improving Remote Load Regulation Using LP3964
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