BCT1812 provides a power supply IC with an output load of 500mA-1.2A in a 5V voltage environment. The IC has synchronous rectification characteristics and can omit a freewheeling diode. IQ=40uA 。 Due to being a DCDC component, it can generate much less heat than LDO in applications with large pressure differences between input and output. At the same time, the IC has two ways of controlling the switch MOS: PWM+PFM, so it has relatively high efficiency even with low load power consumption.