Previous USB Standards were originally centered around small and portable devices, which allowed as high as 7.5W for battery charging products. As devices required more power and products began to shrink in size, USB Type-C was introduced to allow more power (15W) over a reversible USB port and eliminate the need for a separate power cable. The power needs and demands continued to increase further, along with wider adoption among various products. This led to the creation of the USB Power Delivery Standard to be created to accommodate more power by allowing higher than 5V to be delivered across the USB. USB-PD allows as high as 100W to be delivered across a USB Type-C connection. ROHM has partnered with several companies on Type-C designs and has many reference designs to cover a wide variety of applications. In addition, the latest spec now retroactively classifies the original USB 3.0 as USB 3.1 Gen 1.