6 A Synchronous buck regulator with FAST COT control, adjustable current limit & voltage tracking TDA38807 is a 6 A fully integrated,highly efficient DC-DC buck regulator. It uses a fast constant on-time (COT) control scheme, which simplifies design and achieves fast transient response while maintaining excellent line and load regulation. Operating over a wide range of input voltages, it is suitable for use in a broad range of applications. TDA38807 provides internal compensation, simplifying the tuning and reducing the overall design effort.