AAT3258

300mA LDO Linear Regulator with µP Reset

14

3258.2006.03.1.6

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 50

µs 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

possible.

Figure 2: Typical Behavior of Short Duration Pulses vs. RESET Comparator Overdrive.

µP

V

MR

CC

V

CC

VDET

RESET

GND

GND

RESET

INPUT

0.1

µF