Jim Thompson wrote:

In the past I have designed boost converters in burst mode, with peak
current control, but never with a PWM-controlled loop.

Outputs: +5 @ 25mA, -5V @ 20mA

Can someone point me to a tutorial?

Thanks!

[Don't point me to an off-the-shelf part. This has to go into a
_custom_ chip... just a little thing... 1mm x 25mm :-]

Hmm, an inch long and a millimeter wide--it's for a robotic cockroach,
right?

Cheers

Phil Hobbs