Hello-just joined this fine site, anyhow im a graduate engineer and need some advice.
The problem: Need to generate multiple voltages for a portable device[video interface demo].
However I plan on using a 3.6V lithium battery and need to generate the following voltages...1.8, 2.5,-2.5, 3.3 and 5V--from current considerations the max any one of the regulators would source could be 100mA.
Efficency is a concern but board space is also a priorty.
The device will roughly source 200mA to 400mA current.
Should I step up with a high efficeny step-up converter to 5V...then I could
(1) step down with high efficent step-down converters to the required voltages....use a voltage inverter for the -2.5V??
(2) Just use LDO's and step down to the required voltages-- saving space??
Which of the above would be better, or is should I consider some other means.....
Any advice would be great!!!!
Thanks
Alan
The problem: Need to generate multiple voltages for a portable device[video interface demo].
However I plan on using a 3.6V lithium battery and need to generate the following voltages...1.8, 2.5,-2.5, 3.3 and 5V--from current considerations the max any one of the regulators would source could be 100mA.
Efficency is a concern but board space is also a priorty.
The device will roughly source 200mA to 400mA current.
Should I step up with a high efficeny step-up converter to 5V...then I could
(1) step down with high efficent step-down converters to the required voltages....use a voltage inverter for the -2.5V??
(2) Just use LDO's and step down to the required voltages-- saving space??
Which of the above would be better, or is should I consider some other means.....
Any advice would be great!!!!
Thanks
Alan