Electric Rain
New Member
Hey guys. Long time no see... again. I hate to come crawling back here after so long, as I've been trying to figure things out on my own these days. But I'm having trouble finding the voltage regulators I'm looking for. I need to build a 3-output power supply with the following characteristics:
Input: 6V-7.2V @ 4800mAh (Two li-ion batteries)
Output 1: 3.3V @ 1500mA
Output 2: 5V @ 1000mA
Output 3: 8V @ ~50mA (Needed for biasing an LCD display.)
The problem here, is that I need to make it as efficient as possible. So linear regulators are completely out of the question. They have to be switching regulators or DC-DC converters. Preferably switching regulators because they have a lower external part count. What I've been trying to do is just find three regulators that meet or surpass my needs, and just use the "Typical Application Circuit" schematic found in the datasheet, since I have no clue how to just read the datasheet, throw numbers into a calculator and have it tell me the values of every single external part... but it’s just not that simple I guess. It's just really getting confusing to me. :cry: I’ve been looking through Digikey for weeks now, and none of the regulators that would suit my needs have a schematic that I could just follow without making any changes. Any chance someone can recommend a set of regulators or something? Maybe a schematic...? Thanks.
Input: 6V-7.2V @ 4800mAh (Two li-ion batteries)
Output 1: 3.3V @ 1500mA
Output 2: 5V @ 1000mA
Output 3: 8V @ ~50mA (Needed for biasing an LCD display.)
The problem here, is that I need to make it as efficient as possible. So linear regulators are completely out of the question. They have to be switching regulators or DC-DC converters. Preferably switching regulators because they have a lower external part count. What I've been trying to do is just find three regulators that meet or surpass my needs, and just use the "Typical Application Circuit" schematic found in the datasheet, since I have no clue how to just read the datasheet, throw numbers into a calculator and have it tell me the values of every single external part... but it’s just not that simple I guess. It's just really getting confusing to me. :cry: I’ve been looking through Digikey for weeks now, and none of the regulators that would suit my needs have a schematic that I could just follow without making any changes. Any chance someone can recommend a set of regulators or something? Maybe a schematic...? Thanks.