I have a device which uses a 13V programming level; normally 5V
for operation.  I need to figure out a way to quickly raise the 5V
to 13V, then program the device.  Generating the programming
waveforms may not be a problem; I'll cross that bridge when I
come to it.

I'm using an 18F458 (since that's what I had on hand ;-)), and
considering using the ECCP module to make a charge pump, or
boost regulator, or something, to make it run.

I'll have access to 12V, so I only need to boost it a little.  The
problem comes in switching the supply voltage over quickly.
The device (a Melexis programmable hall effect sensor) draws
about 10 mA at 13V, which is more than a charge pump is
easily able to provide.

Anyone have a masterful idea?  This is an entirely new realm
to me.

Mike H.

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