Recently, Texas Instruments (TI) announced the introduction of a high efficiency constant frequency charge pump DC / DC converter, which uses dual-mode conversion function, in the input voltage range to achieve maximum conversion efficiency. This 3mm x 3mm tiny device features an I2C interface and is fully current programmable, making it ideal for a wide range of applications including cell phones, PDAs and multi-display handheld devices. For more information, please visit: TI's TPS60250 can drive up to five white LED's main display and two white LED sub-display, the size of the constant current can be adjusted to maintain the consistency of the intensity. TPS60250 with adaptive charge pump mode and very low dropout current regulator, in the single lithium-ion battery input voltage range to achieve high conversion efficiency. I2C provides four enable inputs to simplify the on-off control of individual displays. To reduce the operating current when using a secondary display LED, the device also provides fully independent operation in the secondary display LED. Key Features: • 3V to 6V input voltage range • 1x and 1.5x charge pumps • I2C supports fully programmable current o64 dimming steps up to 25mA (primary and secondary display groups) o4 dimming steps Up to 80mA (DM5 for auxiliary applications); • Sub-LED current match up to 2% (100μA each) for light loads; • 750kHz charge pump frequency; • Continuous 230mA maximum output current; Efficiency, automatically switches between 1x and 1.5x modes • Built-in soft-start and current-limit functions • Turn-on detection • 16-lead, 3mm x 3mm QFN package Pricing and Availability The TPS60250 is now in volume production and is available through TI and its worldwide network of distributors in a 3mm x 3mm 16-lead QFN package.