The TPS631010 and TPS631011 are constant frequency peak current mode control buck-boost converters. The converters use a fixed-frequency topology with approximately 2-MHz switching frequency. The modulation scheme has three clearly defined operation modes where the converters enter with defined thresholds over the full operation range of V_IN and V_OUT. The maximum output current is determined by the Q1 peak current limit, which is typically 3 A.