LP3961EMP-5.0 National Semiconductor, LP3961EMP-5.0 Datasheet - Page 12

• Manufacturer Part Number: LP3961EMP-5.0
• Description: IC,VOLT REGULATOR,FIXED,+5V,CMOS,SOT-223-4,4PIN,PLASTIC
• Manufacturer: National Semiconductor

Specifications of LP3961EMP-5.0

• Rohs Compliant: NO

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Applications Information
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 2 depicts the advantage of the
SENSE option. LP3961 regulates the voltage at the output
pin. Hence, the voltage at the remote load will be the regula-
tor output voltage minus the drop across the trace resis-
Shutdown Operation
A CMOS Logic level signal at the shutdown ( SD) pin will
turn-off the regulator. Pin SD must be actively terminated
through a 10k pull-up resistor for a proper operation. If this
FIGURE 2. Improving remote load regulation using LP3964
(Continued)
FIGURE 1. Error Flag Operation
12
pin is driven from a source that actively pulls high and low
(such as a CMOS rail to rail comparator), the pull-up resistor
is not required. This pin must be tied to Vin if not used.
tance. For example, in the case of a 3.3V output, if the trace
resistance is 100m , the voltage at the remote load will be
3.22V with 800mAmps of load current, I
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 2 . If the sense option pin is not re-
quired, the sense pin must be connected to the V
DS101129-7
DS101129-8
LOAD
. The LP3964
OUT
pin.