NCP5424

NCP5424 Dual Synchronous Buck Controller with Input Current Sharing The NCP5424 is a flexible dual N−Channel synchronous buck controller utilizing V2t 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 NCP5424 can also be configured as two independent out−of−phase controllers. Using the NCP5424 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 NCP5424 provides a cycle−to−cycle current limit on Controller 2 allowing the system to handle transient overcurrent events and a hiccup mode overcurrent protection on Controller 1 allowing lossless short circuit protection. In addition, the NCP5424 provides Soft−Start, undervoltage lockout, and built−inwww.DataSheet4U.com adaptive FET nonoverlap time to prevent shoot through. Features http://onsemi.com 16 1 SOIC−16 D SUFFIX CASE 751B PIN CONNECTIONS AND MARKING DIAGRAM 1 GATE(H)1 GATE(L)1 GND BST IS+...