Synchronous 1.5A step-down DC/DC converters offer high-speed transient response



The XC9260/XC9261 Series of synchronous step-down DC/DC converters with 1.5A output from Torex Semiconductor incorporates their HiSAT-COT control method (High Speed Transient Response). Compared to standard COT control, this control method has less fluctuation in oscillation frequency against load and input voltage. The input voltage range for the devices are from 2.7V to 5.5V, and the output voltage range is from 0.8V to 3.6V (accuracy 2.0%). The current consumption is 15?A (fOSC=1.2MHz), and 1.2MHz or 3.0MHz can be selected for the oscillation frequency based on the application. The operating ambient temperature range is from -40°C up to +105°C. Either PWM control (XC9260) or PWM/PFM automatic switching control (XC9261) can be selected. These modes are ideal for mobile and/or digital devices with DDR memories and CPUs. The soft-start time is set to 0.3ms (TYP.). With the built-in UVLO function, the driver transistor is forced OFF when the input voltage becomes 2.0V or lower. Depending on the application, the SOT-89-5 or the small USP-6C (1.8 x 2.0 x h0.6 mm) package can be selected. This series is an environment-friendly product that complies with the EU RoHS Directive and is Pb-free. Torex Semiconductor