The MAX16833/MAX16833B are peak current-modecontrolled LED drivers for boost, buck-boost, SEPIC, flyback, and high-side buck topologies. A dimming driver designed to drive an external p-channel in series with the LED string provides wide-range dimming control. This feature provides extremely fast PWM current switching to the LEDs with no transient overvoltage or undervoltage conditions. In addition to PWM dimming, the MAX16833/ MAX16833B provide analog dimming using a DC input at ICTRL. The MAX16833/MAX16833B sense the LED current at the high side of the LED string. A single resistor from RT/SYNC to ground sets the switching frequency from 100kHz to 1MHz, while an external clock signal capacitively coupled to RT/SYNC allows the MAX16833 or MAX16833B to synchronize to an external clock. In the MAX16833, the switching frequency can be dithered for spread-spectrum applications. The MAX16833B instead provides a 1.64V reference voltage with a 2% tolerance. The MAX16833/MAX16833B operate over a wide 5V to 65V supply range and include a 3A sink/source gate driver for driving a power MOSFET in high-power LED driver applications. Additional features include a faultindicator output (FLT) for short or overtemperature conditions and an overvoltage-protection sense input (OVP) for overvoltage protection. High-side current sensing combined with a p-channel dimming MOSFET allow the positive terminal of the LED string to be shorted to the positive input terminal or to the negative input terminal without any damage. This is a unique feature of the MAX16833/MAX16833B.