I need to power a control circuit from a variety of LiPo batteries 3-6S (12.6V to 25.2V). The control circuit can draw up to 100mA at 5V (atmega328p + other discrete components, LEDs, etc).
Choices I know about:
- Voltage Regulator LM340T-5.0 stepping down any voltage up to 35V. The problem is power dissipation. Because the solution has very limited space, no heat-sink is available.
- Buck/Step-Down Converter LMZM23600. 5-times more expensive and difficult to handle, due to strange packaging (pins on the bottom).
Is there any other straight-forward way to power control circuit from 3-6S battery ?