The CM9142 is an adaptive fractional switched capacitor (charge pump) regulator optimized for driving two groups, 4 and 2, of white LEDs Each group features individual ON/OFF controls and individually set current. Each LED's driver current is matched to within 2% for uniform intensity. It supports an input voltage range of 2.9V to 6V, with undervoltage lockout. A failure detection circuit prevents the loss of power when one or more LEDs fail (short or open). Internal over-temperature and over-current management provide short circuit protection.