The ADI LT8338 switching frequency can be set with an external resistor over the range of 300kHz to 3MHz. A SYNC/MODE pin allows synchronization to an external clock. The pin is also used to select between Burst Mode operation and pulse-skipping mode or enable spread spectrum modulation to reduce EMI. The EN/UVLO pin has an accurate 1V threshold and can be used to program VIN UVLO or to shut down the part. The LT8338 enters 100% duty cycle PassThru mode when VIN is higher than the regulated VOUT. The LT8338 also features frequency foldback and internal soft-start for inductor current control during start-up.