M
M. Noone
- Jan 1, 1970
- 0
Hi - I just discovered on a set of boards that I'm working on that the
microcontroller that I'm using (Atmel atmega168) requires a 5V supply
for full speed operation. I had planned on giving it 3.3V so now I have
to figure out how to step up the 3.3v supply to 5V. 3.3V line is very
low noise, as it was originally designed to be driving this
microcontroller. Right now - the best solution I've been able to come
up with is the Microchip MCP1252/MCP1253:
http://ww1.microchip.com/downloads/en/devicedoc/21752a.pdf
It steps up 3.3v to 5V up to 150ma, which is more than enough for my
needs. It is an 8-MSOP package and needs three ceramic capacitors. It
is specced for 2.5% accuracy and 45mv ripple. It's not perfect, but I
think it'll probablay work.
My question is this: Are there any better solutions out there? Cost is
not a worry, as this is a very low volume application. Size is my
biggest worry as I was already running out of space on this board
before I discovered that I need a 5V supply.
Thanks,
-Mike
microcontroller that I'm using (Atmel atmega168) requires a 5V supply
for full speed operation. I had planned on giving it 3.3V so now I have
to figure out how to step up the 3.3v supply to 5V. 3.3V line is very
low noise, as it was originally designed to be driving this
microcontroller. Right now - the best solution I've been able to come
up with is the Microchip MCP1252/MCP1253:
http://ww1.microchip.com/downloads/en/devicedoc/21752a.pdf
It steps up 3.3v to 5V up to 150ma, which is more than enough for my
needs. It is an 8-MSOP package and needs three ceramic capacitors. It
is specced for 2.5% accuracy and 45mv ripple. It's not perfect, but I
think it'll probablay work.
My question is this: Are there any better solutions out there? Cost is
not a worry, as this is a very low volume application. Size is my
biggest worry as I was already running out of space on this board
before I discovered that I need a 5V supply.
Thanks,
-Mike