SINGLE-SUPPLY FAULT MONITOR Electronics Circuits Electronics Microcontroller

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SINGLE-SUPPLY FAULT MONITOR

This circuit shows a typical over/under-voltage fault monitor for a single supply. The upper trip points, controlling OUT 1, are centered on 5.5 V with 100 mV of hysteresis(Vu=5.55V, Vl=5.45V); and the lower trip points, controlling OUT 2, are centered on 4.5 V, also with 100 mV of hysteresis. OUT 1 and OUT 2 are connected together in a wired OR configuration
to generate a power OK signal.

Figure 1 Schematic of Single Supply Fault Monitor

Components

Name List	Quantity
ICL7665 Maxim	1
324 K Resistors	1
13 K Resistors	1
100 K Resistors	2
5 K Resistors	1
249 K Resistors	1