The ADuM4470/ADuM4471/ADuM4472/ADuM4473/ ADuM44741 are quad-channel， digital isolators with a regulated dc-to-dc isolated power supply controller and an internal MOSFET driver. The dc-to-dc controller has an internal isolated PWM feedback from the secondary side， based on the iCoupler? chip scale transformer technology and complete loop compensation. This eliminates the need to use an optocoupler for feedback and compensates the loop for stability. The ADuM447x isolators provide a more stable output voltage and higher efficiency compared to unregulated isolated dcto-dc power supplies. The fully integrated feedback and loop compensation in a wide-body SOIC package provide a smaller form factor and 8.3 mm creepage distance solution. The regulated feedback provides a relatively flat efficiency curve over the full output power range. The ADuM447x enable a dcto-dc converter with a 3.3 V to 24 V isolated output voltage range from either a 5.0 V or a 3.3 V input voltage， with an output power of up to 2.5 W. The ADuM447x isolators provide four independent isolation channels in a variety of channel configurations and data rates. （The x in ADuM447x throughout this data sheet stands for the ADuM4470/ADuM4471/ADuM4472/ADuM4473/ADuM4474.）