On-chip voltage regulator

AN3326

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DocID18333 Rev 3

2

On-chip voltage regulator

The SPC56EL60x device is supplied with 3.3 V ±10% (3.0–3.6 V). Additionally, the device’s

regulation of the 1.2 V via the internal or external ballast from the external 3.3 V voltage

supply.

The on-chip voltage regulator module provides the following main features:



Works with either an NPN external ballast transistor or the internal one



Auto-detection of the external ballast (if external ballast is not detected, SPC56EL60x

works with the internal one)



Low- and high-voltage detection on the 1.2 V supply



Low-voltage detection on the 3.3 V supply voltages

SPC56EL60x can work using either the internal ballast (see Figure 1) or an external one

(see Figure 2).

Figure 1. Block scheme of SPC56EL60x used with the internal ballast

1.

Grey blocks represent external passive components.