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SUNNYVALE , Calif., Dec. 5 /PRNewswire-FirstCall/ -- Advanced AnalogicTechnologies Incorporated (AnalogicTech) (Nasdaq: AATI), a developer of powermanagement semiconductors for mobile consumer electronic devices, announced today the AAT2842, a 600mA charge pump with dual low dropout linear regulators(LDOs) for portable systems operating from Lithium-ion/polymer batteries. Configured as a Total Display Solution(TM), this new device features two separate S2Cwire(TM) (Simple Serial Control(TM)) serial digital interfaces,allowing designers to independently drive up to four LEDs for either display backlight or keypad applications and four LEDs for high-current flash applications.
"Many mobile and personal electronics applications powered by a single-cell Li-ion battery, such as smart phones, digital still cameras, and camera-enabled mobile devices, use separate ICs for backlight and flash functions," said Adolfo Garcia , Product Line Director for AnalogicTech. "By combining ahigh current charge pump, backlight/keypad drivers, a high output flashdriver, and two general purpose LDOs in a single 4x4mm package, and byretaining independent control of the backlight/keypad and flash functions, the AAT2842 offers product developers an attractive way to lower their partscount, lower the system BOM cost, and build more compact systems withoutcompromising their design flexibility or circuit performance."
High Current Charge Pump
The AAT2842 features a high current tri-mode charge pump capable ofdriving up to four backlight LEDs up to 30mA each. Alternately, the backlight current outputs can be programmed to drive lower current LEDs for applications such as keypad backlighting. The charge pump can also drive up to four LEDsfor flash functions at up to a total of 600mA.
Two separate S2Cwire serial digital interfaces allow designers toindependently enable, disable, or set current at up to 16 levels for thebacklight/keypad and flash functions. The backlight / keypad and flash LEDs can also be separately controlled via external resistors. To protect the flash LEDs against thermal damage, the AAT2842 also features an integrated flashtimer which can be set by an external capacitor.