Datasheet

LM3411
SNVS113E –DECEMBER 1999–REVISED APRIL 2013 www.ti.com
Figure 29. Precision Negative Voltage Regulator
Figure 30. Precision Negative Voltage
Regulator with Accurate Current Limit
A simple 5V supply monitor circuit is shown in Figure 31. Using the LM3411's voltage reference, op-amp (as a
comparator) and output driver, this circuit provides a LED indication of the presence of the 5V supply.
Figure 31. 4.7V Power ON Detector with Hysteresis
The LM3411 initial room temperature tolerance is ±1% and ±0.5% for the “A” grade part. If a tighter tolerance is
needed, a trim scheme is shown in Figure 32 that provides approximately ±1% adjustment range of the
regulation voltage (V
REG
).
Figure 32. ±50 mV External Trim
The LM3411 is ensured to drive a 15 mA load, but if more current is needed, a NPN boost transistor can be
added. The circuit shown in Figure 33 is a shunt regulator capable of providing excellent regulation over a very
wide range of current.
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