The device uses 3 internal N-channel MOSFETs to maintain synchronous power conversion at all possible operating conditions. This enables the device to keep high efficiency over a wide input voltage and output power range. Using 2 rectifying switches also enables the device to control the output voltage and current during startup conditions when the input voltage is higher than the output voltage. During startup, the rectifying switch works in a linear mode until the output voltage is near the input voltage. Once in regulation, operating with the input voltage greater than the output voltage may cause either the output voltage or current to exceed its regulation value. Although this operating point is not recommended, the device will not be damaged by this as long as absolute maximum ratings are not violated.
As opposed to a standard boost converter, the implemented 3 switch topology enables the output to be disconnected from the input during device shutdown when disabled. Current does not flow from output to input or from input to output.