The two switching regulator outputs can also be paralleled to operate as a dual-phase regulator. The use of synchronous rectification and pulse-skip operation at light load achieves high efficiency over a wide load range. The switching frequency of the LM2645 is user selectable between 200 kHz or 300 kHz. An internal 5V rail is also available externally for driving bootstrap circuitry. Current-mode feedback control assures excellent line and load regulation and a wide loop bandwidth for excellent response to fast load transients.
Current limit is independently adjustable for each channel.
The analog soft-start for the switching controllers uses an innovative new approach. It is independent of the input voltage which makes the soft-start behavior more predictable and controllable. The undervoltage latch can be disabled or adjustably delayed. If you have trouble printing, see Printing Problems . Quick Search Parametric Search System Diagrams Product Tree Home About Languages .