The MCP1641x family of step-up DC/DC converters from Microchip Technology provides an automatic input-to-output voltage bypass operation, which helps in optimizing battery utilization and achieving high efficiency while fresh batteries’ nominal voltage is in the same range with the converter’s output value. The MCP1641x can be powered by single-cell, two-cell alkaline/NiMH batteries, or single-cell Li-Ion/Li-Polymer batteries. The MCP1641x family introduces an additional safety feature to a low-voltage boost converter: overtemperature output. Devices, such as personal care products, Bluetooth® headsets, or toys, will benefit from combined Power Good and Die Overtemperature (PGT) output, which flags a warning signal when the output voltage level drops with 10% or the die temperature exceeds the 75°C, typically. Both functions are implemented in the MCP16411/2/3/4 devices (on the same pin, PGT), while the MCP16415/6/7/8 devices have the Power Good only option.