The STMicroelectronics VIPER013HS is an offline switching regulator that integrates the power MOSFET and control logic into a single 10-SSOP package. It handles buck, buck-boost, and flyback topologies, making it a flexible building block for non-isolated or isolated AC-DC converters up to 7 W output. The 800 V breakdown voltage gives it the headroom for direct rectified mains input without an external clamping snubber in most low-power designs. The 120 kHz switching frequency keeps the transformer or inductor physically small.
The base product number VIPER013 covers a family of output power and package variants; the HS suffix identifies this specific 10-SSOP, 7 W version.