USB-OVP

[Andy Green]

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Somebody in the thread at some point said:

| Charger Overshoot Voltage VCHGR_OVRSHT 6.0 V max.
| -----
|
| Though we couldn't even attach a USB-charger compliant to this spec,
as it has
| to be equipped with micro-USB plug, we should expect to see voltages on
| USB-receptacle of up to 6.0V AT LEAST.

Why?  Our charger doesn't follow that spec that mentions 6.0V.

| I think it's a strong argument for additional OVP extending our actual
| abs.max.rating of 5.5V to limits safely beyond 6.0V, like we are actually
| about to do for GTA03.

Regulator and cap in the charger should mitigate this.  Why don't we
measure our actual charger performance in this case, shouldn't be too hard.

- -Andy
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