MAX1910EUB+

MAX1910EUB+ is a 1.5x/2x high-efficiency white LED charge pump. This is power LED with a regulated output voltage or current (up to 120mA) from an unregulated input supply. It is complete DC-DC converter requiring only 4 small ceramic capacitors and no inductors. Input ripple is minimized by a unique regulation scheme that maintains a fixed 750kHz switching frequency over a wide load range. Also included are logic-level shutdown and soft-start to reduce input current surges at start-up. It has two automatically selected operating modes such as 1.5x and 2x. 1.5x mode improves efficiency at higher input voltages while 2x mode maintains regulation at lower input voltages. Typical applications include white LED backlighting, cellular phones, PDAs, digital still cameras, MP3 Players and backup-battery boost converters.

• High-efficiency 1.5x/2x charge pumps
• Low input ripple with 750kHz operation
• 200mV current-sense threshold reduces power loss
• Current or voltage regulated charge pump
• Up to 120mA output current
• Regulated ±5% LED current
• Load disconnected in shutdown
• 1µA shutdown current
• 10 pin µMAX package
• Operating temperature range from -40°C to 85°C

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party