LM2759 is an integrated low-noise, high-current switched capacitor DC/DC converter with a
regulated current source. The device requires only four small ceramic capacitors making the total
solution area less than 22 mm2 and the height less than 1 mm. The LM2759
is capable of driving loads up to 1A from a single-cell Li-Ion battery. Maximum efficiency is
achieved over the input voltage range by actively selecting the proper gain based on the LED
forward voltage and current requirements.
The LED current can be programmed up to 1A via an
I2C-compatible interface, along with eight selectable Flash Time-Out
durations. One high-current Flash LED can be driven either in a high-power Flash mode or a
low-power Torch mode. The Strobe pin allows the flash to be toggled via a Flash enable signal from
a camera module. The TX input pin limits the Flash LED current to the Torch current level during a
RF PA pulse, to reduce high loads on the battery. Internal soft-start circuitry limits the amount
of inrush current during start-up.
LM2759 is offered in a small 12-pin thermally enhanced WSON package.
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