MAX20047 Dual 3A USB DCP Charger Analog Devices Inc. MAX20047 Dual 3A USB DCP Charger is automotive-grade, with a small footprint designed for automotive charging applications. The MAX20047 Charger combines a fully synchronous 6A step-down buck converter with integrated high-side and low-side FETs capable of operating with input voltages from 3.5V to 36V and delivering 5.2V output voltage. Additionally, the device offers integrated iPod®/iPhone® 1.0A and iPad® 2.1A dedicated charging modes.