The WD5125C is a high efficiency, high output current buck-boost converter fully programmable through I²C. Depending on the input voltage, it can automatically operate in boost, buck or in a novel 4-cycle buck-boost mode when the input voltage is approximately equal to the output voltage. The transitions between modes happen at defined thresholds and avoid unwanted toggling within the modes to reduce output voltage ripple. Two registers, accessible through I²C, set the output voltage, and a VSEL pin selects which output voltage register is active. Thus the devices can support dynamic voltage scaling. If the output voltage register is changed during operation or the VSEL pin is toggled, the device transits in a defined, programmable ramp-rate.

The WD5125C is available in a 2.2 mm x 1.3 mm CSP-15L package. Standard products is Pb-Free and Halogen-Free.

Applications
– System pre-regulator
– Point-of-load regulation
– Thermoelectric device supply
– Broadband network radio or SoC supply