AL17150-10B High-Voltage Step-Down Switcher Diodes Inc. AL17150-10B High-Voltage Step-Down Switcher is a universal high voltage input step-down regulator that provides an accurate Constant Voltage (CV). The device also provides outstanding dynamic performance without requiring an optocoupler over the line and load regulation. Typical applications are offline low power applications, including connected LED lighting power supply for micro-controllers and other IoT applications.