Diodes Incorporated has enhanced its range of P-channel MOSFETs for load switching. Supplied in the small form-factor 2 mm x 2 mm DFN2020 package, DMP1022UFDF and DMP2021UFDF P-channel MOSFETs are rated at 12 V and 20 V, respectively. These devices are specifically designed for load switching for high-efficiency battery management in portable consumer electronics, such as the Internet of Things (IoT), tablets, smartphones, Ultrabooks, solid-state drives (SSDs), and hard-disk drives (HDDs).

Circuit designers looking for a simple and inexpensive solution to disable low-voltage power rails will appreciate the low guaranteed R_DS(ON) under low gate drive conditions. This enables power rails down to 1.5 V to be switched with minimal conduction losses. The DMP1022UFDF has an R_DS(ON) of <20 mΩ with a -2.5 V gate drive, while the DMP2021UFDF achieves <26 mΩ at -1.8 V gate drive. Switching off power to idle processor cores and other inactive circuitry using MOSFETs as high side load switches is a very effective method of extending battery life.