cupoftea
Advanced Member level 6
- Joined
- Jun 13, 2021
- Messages
- 3,081
- Helped
- 62
- Reputation
- 124
- Reaction score
- 139
- Trophy points
- 63
- Activity points
- 16,087
Hi,
Just looking for the cheapest, fairly well regulated NEG1V5 supply from a 10V source. Load from 0 to 100mA.
The attached is the cheapest i can get so far.
Any cheaper ideas?
Charge pumps are not regulated (not the cheapos) and so cant really do it even though cheap.
Its just a NEG1V5 rail which acts as a turn off voltage for NPN's....due to the sheer expanse of the circuit, and wiring etc, the grounds may not be the same everywhere, so we want a slight negativised turn-off voltage to assure we deffo turn off when we want to.
LTspice and PNG attached.
BTW we would use the cheaper UCC28C43 rather than the pin4pin LT1243.
Just looking for the cheapest, fairly well regulated NEG1V5 supply from a 10V source. Load from 0 to 100mA.
The attached is the cheapest i can get so far.
Any cheaper ideas?
Charge pumps are not regulated (not the cheapos) and so cant really do it even though cheap.
Its just a NEG1V5 rail which acts as a turn off voltage for NPN's....due to the sheer expanse of the circuit, and wiring etc, the grounds may not be the same everywhere, so we want a slight negativised turn-off voltage to assure we deffo turn off when we want to.
LTspice and PNG attached.
BTW we would use the cheaper UCC28C43 rather than the pin4pin LT1243.
Last edited: