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LM1084IT-3.3/NOPB View Datasheet(PDF) - Texas Instruments

Part NameLM1084IT-3.3/NOPB TI
Texas Instruments TI
Description5-A Low Dropout Positive Regulators
LM1084IT-3.3/NOPB Datasheet PDF : 29 Pages
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Typical Applications (continued)
8.2.11 Generating Negative Supply Voltage
A quick inverting output rail or negative output rail is shown in Figure 26 using the LM1084 fixed output part. By
tying the output to GND, the GND node is at a relatively more negative potential than the output. This is then
interfaced to the negative application such as an operational amplifier or any other rail needing negative voltage.
Figure 26. Generating Negative Supply Voltage
8.2.12 Remote Sensing
Remote sensing is a method of compensating the output voltage to a very precise degree by sensing the output
and feeding it back through the feedback. The circuit implementing this is shown in Figure 27 using the LM1084-
ADJ. The output of the regulator is fed into a voltage follower to avoid any loading effects and the output of the
op-amp is injected into the top of the feedback resistor network. This has the effect of modulating the voltage to a
precise degree without additional loading on the output.
Figure 27. Remote Sensing
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