Powering 3.3V digital systems
Dennis O’Neill
Abstract
The LT1083 family of adjustable low dropout regulators is described, which offer a simple solution to powering 3.3V digital devices with almost no efficiency compromise.
Keywords
3.3V digital devices
low dropout regulator
LT1083
LT1087
The new generation of high density digital devices requiring 3.3V power supplies impose some unique constraints on power supply designers. In nearly all cases the computers using these devices already have a 5V system supply. Deriving the 3.3V supply from the existing 5V rail permits system upgrades with a simple on-card solution. In many cases the 5V rail is the only supply available, mandating this approach. The first decision to be made ...
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