I often have a need for 5V - e.g. when driving a crapload of LEDs - I typically need 4-5V for the LEDs anyway, so 5V everything saves parts.
you driv ethem directly from i/o pins ? For led chains i typically use an open drain driver like an uln28xx or i slap in 2n7002 mosfets. work like charm.
there are special low voltage mosfets for this kind of app.
if lots of current is involved you need a real gate driver cicuit anyway.
It seems a shame that even on parts that use a LV core and have voltage regulation built in, that regulation couldn't go p to 5V instead of 3v3.
power dissipation in the package... they design these things to be low power , and then you burn off 'waste-power' using an ldo to go from 5 to 1.8 ... so you just shot your 'low power' to shreds... for a 5 volt power supply and a core voltage of 1.8 volts . lets say the core consumes 1.8 milliwatt... while burning off 3.2 to get there ... efficiency : zilch ...
From 3.3 you only burn of 1.5... 3.2 to 1.5 is more than 50% gain.
If only they would use an on board switcher ( switchcap or external coil) then it would get interesting.
Can't remember the last time I designed a DIP in though. In terms of prototyping difficulty, the difference between DIP and SO isn't as big as SO and smaller pitch or quad packages.
indeed. SO is no harder than dip. TSSOP is a bit more annoying...
how come nobody makes SMD DIP switches with sensible sized actuators.
you mean the ones that stick out as opposed to the annoying recessed ones ?
i believe APEM and some german company have those. they are black body with white levers that stick out. they are a bit more expensie as they come with a piece that needs removing after assembly ( the bits that stick out prevent P&P robots from picking them up. so they have a transparent cover so the robot can handle them. this thing just pops off after assembly. )