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The LDS8842 is a high-efficiency 1x/1.33x/1.5x/2x fractional charge pump capable of driving up to four LEDs at up to 25mA each. LED dimming control is programmable with a one-wire interface enabling current level adjustment from 0.78mA to 25mA. LED channel matching is supported within +/-1.5%, with current accuracy at +/-2%. Input voltages from 2.5v to 5.5v are supported with efficiency up to 92%. Operation at switching frequencies of 1.3MHz (1.5x mode) and 1MHz (1.33x and 2x modes) enables low noise input ripple and utilization of small external ceramic capacitors. Other product features include soft start and current limiting, thermal shutdown and short circuit protection, and a low current shutdown mode of 1uA max. The LDS8842 is offered in a 16-lead thin QFN 3mm x 3mm package with a maximum height of 0.8mm.

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