A5973AD

Functional description

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4.1

Power supply and voltage reference

The internal regulator circuit (shown in Figure 4) consists of a start-up circuit, an internal

voltage preregulator, the bandgap voltage reference and the bias block that provides current

to all the blocks.

The starter gives the start-up currents to the whole device when the input voltage goes high

and the device is enabled (inhibit pin connected to ground).

a very low supply voltage noise sensitivity.

4.2

Voltages monitor

Figure 4.

Internal regulator circuit