LT8393 Synchronous Buck-Boost LED Controller Analog Devices Inc. LT8393 Synchronous Buck-Boost LED Controller is designed to regulate LED current from input voltage above, below, or equal to the output voltage. The proprietary peak-buck, peak-boost current-mode control scheme allows adjustable and synchronisable 350kHz to 2MHz fixed-frequency operation, or internal 25% triangle spread-spectrum operation for low EMI. With 4V to 60V input, 0V to 100V output, and seamless low-noise transitions between operation regions, the LT8393 is ideal for LED driver and battery charger applications in automotive, industrial, and battery-powered systems.