AAT3258_06 Datasheet, PDF (14/16 Pages) Advanced Analogic Technologies – 300mA LDO Linear Regulator with μP Reset

AAT3258
300mA LDO Linear Regulator with µP Reset
pulses. Figure 2 shows typical behavior of short
duration pulses versus RESET comparator over-
drive. As shown in the Maximum Transient
Duration vs. Reset Threshold Overdrive graph,
when the transient voltage becomes larger, the
time allowed before asserting a reset becomes
shorter (e.g., typically a transient of 100mV below
the reset threshold would have to be present for
more than 50µs to cause a reset). Immunity can be
increased by the addition of a small bypass capac-
itor of 0.1µF connected as closely to the V_CC pin as
possible.
V_CC
VDET
0.1µF
MR
RESET
GND
V_CC
RESET
INPUT
µP
GND
Figure 2: Typical Behavior of Short Duration Pulses vs. RESET Comparator Overdrive.
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3258.2006.03.1.6