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The LDS8866 is a high-efficiency multi-mode fractional charge pump with ultra low dropout voltage that can drive up to six LEDs. Inclusion of a 1.33x fractional charge pump mode and ultra low dropout PowerLite Current Regulator increases the efficiency up to 95%. The 1.33x mode requires no additional external capacitors. The PWM1/PWM2 logic inputs function as a chip enable and a PWM mode LED brightness control. The maximum LED current is factory preset and can be programmed in the range from 0.5mA to 32mA in 0.5mA steps. The multi-fractional charge pump supports a wide range of input voltages from 2.7V to 5.5V. The device is available in a 16-lead TQFN 3mm x 3mm package with a maximum height of 0.8mm.

PWM LED Current Control Application Note