Bob's Blog #3: 7330 Internal Power Supply
The 7330’s internal power supply is compatible with both standard and alternative energy sources. Here’s how it works.
The 7330’s circuitry requires four voltages: +5 V, +3.3 V, +2.5 V, and +1.2 V. A type of DC/DC converter called a buck regulator reduces the external supply voltage to +5 V; linear regulators further reduce +5 V to the other voltages.