Overview: NCP5424A Dual Synchronous Buck Controller with Input Current Sharing
The NCP5424A is a flexible dual N−channel synchronous buck controller utilizing V2™ control for fast transient response and excellent line and load regulation. This highly versatile controller can be configured as a single two phase output converter that draws programmable amounts of current from two different input voltages or all current from one supply. The NCP5424A can also be configured as two independent out−of−phase controllers.
Using the NCP5424A in a current sharing input configuration is ideal for applications where more power is required than is available from one supply, such as video cards or other plug−in boards. When configured as a dual output controller, the output of one controller can be divided down and used as the reference for the second controller. This tracking capability is useful in applications such as Double Data Rate (DDR) Memory power where the termination voltage must track VDD.
The NCP5424A provides a cycle−to−cycle current limit allowing the system to handle transient overcurrent events. In addition, the NCP5424A provides Soft Start, undervoltage lockout, and built−in adaptive FET nonoverlap time to prevent shoot through.
