Texas Instruments TPS54A20 SWIFT Step-Down Converter

Texas Instruments TPS54A20 SWIFT Step-Down Converter is a two-phase, synchronous series capacitor buck converter designed for small size, low voltage applications from a 12V input rail. This topology uniquely merges a switched capacitor circuit with a two-phase buck converter. Advantages include automatic current balancing between the inductors, lower switching losses which enable high frequency (HF) operation, and voltage step-down through the series capacitor. Small, low-profile inductors used with the Texas Instruments TPS54A20 significantly reduce total solution area and height. An adaptive on-time control architecture provides fast transient response and accurate voltage regulation at up to 10MHz operating frequency. Fixed frequency operation during the steady-state is maintained using a phase lock loop (PLL) to lock switching signals to a reference oscillator.