The TC115 is a high-efficiency step-up DC/DC converter for small, low input voltage or batterypowered systems. This device has a start-up voltage of 0.9V and a typical supply current of 80 A. Phase compensation and soft-start circuitry are included onchip. Unlike conventional PWM step-up converters, the TC115 automatically shifts to pulse frequency modulation (PFM) at low loads, resulting in reduced supply current and improved efficiency.