Efficiency not only helps power consumption, it also improves system reliability. More efficiency means less heat hence reliable operation. The ISL8117/A has multiple features to boost efficiency across all loads. For example, the strong driver supports high current MOSFETs and boosts efficiency at higher loads. External bias saves internal LDO losses, hence boosting efficiency on the boards where a 5V rail is readily available. ISL8117 also has DEM mode with pulse skipping, which boosts efficiency at light load without introducing a variable frequency like PFM mode. ISL8117 runs on a very low Iq of 2.5mA which helps in lighter loads and prolongs battery life. The graph, shown here, on the right side of the slide gives a clear idea of the impact that external bias and DEM mode makes in terms of efficiency. At 1A load efficiency, the difference is 9%.