STMicroelectronics LED200x Monolithic Step-Down DC-DC Converters are 850kHz converters designed to operate as a precise constant current source with an adjustable current capability up to 4A DC. The embedded PWM dimming circuitry offers LED brightness control. The size of the overall application is minimized due to the high switching frequency and ceramic output capacitor compatibility. The STMicroelectronics LED200x Converters are protected against thermal overheating, overcurrent, and output short-circuit.