LTC’s LTC7820 are fixed ratio high voltage, high-power switched capacitor/charge pump DC/DC controllers. These controllers include four N-channel MOSFET gate drivers to drive external power MOSFETs in voltage divider, doubler, or inverter configurations. The LTC7820 achieve a 2:1 stepdown ratio from an input voltage as high as 72 V, a 1:2 step-up ratio from an input voltage as high as 36 V, or a 1:1 inverting ratio from an input voltage up to 36 V. Each power MOSFET is switched with 50% duty cycle at a constant pre-programmed switching frequency. System efficiency can be optimized to over 99%. The LTC7820 switching frequency can be linearly programmed from 100 kHz to 1 MHz. The devices are available in a 28-pin QFN package and have a temperature range of -40°C to +125°C (T_J). The LTC7820 are ideal for high-power, non-isolated intermediate bus applications with fault protection.