I have a 6V 3AMP power supply and I wanted to reduce the voltage output to 5V 3AMP.
I saw buck converted on ebay of the following spec. Can i use it to step down 6V to 5V without losing Ampere? or any suggestion, how i can step down 6V to 5V while keeping 3AMP.
DC-DC Buck Step Down Converter Regulator Power Supply Module 9V 12V 24V to 5V 3A.
Mini DC-DC Step Down Converter
Input voltage 7V~28V
Output voltage 5V(Precision 1%）
Output current 3A(max),long time work within 1.5A
Conversion efficiency 96%(max)
Output ripple <30mV
Switching frequency 1.5MHz(max), Typical 1MHz
Best Answer
It says that the input voltage is a minimum of 7 volts and this means that it won't work correctly if the input voltage drops below 7 volts. Don't ask what might happen if you do run it at 6 volts because I won't be able to answer you. There are devices out there that should do what you want. Keep looking.
It also says that the peak current that can be delivered is 3 amps but the wording implies to me it can only deliver 1.5 amps continuously.
Here's a design from Linear technology that can do what you want with what looks like apparent ease: -
There is also this device too: -
And this: -
So, in conclusion, there are designs around and maybe you can find someone vending this as a finished PCB. There are similar offerings from Texas Instruments as well.