MuxCapacitor

The MuxCapacitor is a multi-switch charge pump configured to provide multiple voltage conversation ratios, or gains. Higher gain ratios are achieved by cascading multiple MuxCapacitor stages. Using efficient high voltage switches and low loss capacitors, the MuxCapacitor delivers the most output energy available. The MuxCapacitor is the only power delivery system that achieves 99% efficiency at light loads. Magnetic based power supplies are at their worst with light loads.

Advantages

• High-efficiency voltage conversion
• 99% power delivery efficiency at light loads
• Cascadable for high conversion ratios
• Multiple gain ratios per MuxCapacitor stage
• Flexible clocking for lowest vampire mode
• Zero Power no-load power consumption
• Minimum parts counts

Operation

The MuxCapacitor switches are timed using a two phase clock. Selective enabling of the switches charges up the appropriate capacitors to provide the desired voltage conversion ratio. Variable clock frequency enhances low power efficiency. Optional external clock synchronization is available to minimize noise coupling issues.

Efficiency Curve

The MuxCapacitor Efficiency Curve highlights the advantage of the MuxCapacitor power delivery. Not only is the efficiency extremely high, but there is no efficiency penalty at low operational loads. Each MuxCapacitor stage consumes less than 1μA quiescent operating current.

Helix solutions enable electronic applications to improve their energy efficiency and competitiveness.