I need negative voltage in my circuit with common ground wrt positive voltage
1. One option is to generate negative supply by placing a full- bridhe & then using 7905.
It includes lots of extra components to be used.
2. Another option is to use TC7660. Simple to use & works good. Only problem is its output voltage falls with current. For a load current of -10 mA and a supply voltage of +5V, the output voltage would be -4.3V.
3.I need to generate regulated -5V,-2.5V&-1.8V
4.Any other way to do that?