SENSE PIN

In applications where the regulator output is not very close to

the load, LP3876 can provide better remote load regulation

using the SENSE pin. Figure 2 depicts the advantage of the

SENSE option. LP3873 regulates the voltage at the output

pin. Hence, the voltage at the remote load will be the regu-

lator output voltage minus the drop across the trace resis-

tance. For example, in the case of a 3.3V output, if the trace

resistance is 100m

Ω, the voltage at the remote load will be

3V with 3A of load current, I

voltage at the sense pin. Connecting the sense pin to the

remote load will provide regulation at the remote load, as

shown in Figure 2. If the sense option pin is not required, the

sense pin must be connected to the V

20060507

FIGURE 1. Error Flag Operation

20060508

FIGURE 2. Improving remote load regulation using LP3876

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