AAT2842 | High-Current Charge Pump With S2Cwire™ Control And Dual LDO For Backlight And Flash

The AAT2842 is a highly integrated Charge Pump with dual linear Regulators optimized for systems operating with lithium-ion/polymer batteries. The Charge Pump provides power for both white LED backlight/keypad and Flash Up to four backlight LEDs CAN be driven at up to 30mA each and keypad LEDs CAN be driven using lower currents set by the S2Cwire Interface In addition, up to four Flash LEDs CAN be driven with up to 600mA total. Two separate S2Cwire (Simple Serial Control) serial digital Interfaces are used to enable, disable, and set the current to one of 16 levels for both backlight and Flash LEDs Backlight/keypad and Flash current settings are also controlled through external resistors for increased versatility with reduced accuracy and matching. Backlight/keypad current matching is 1% for uniform Display brightness, and Flash current matching is 4% for uniform power dissipation. An integral Flash Timer set by an external capacitor protects the Flash LED should a fault occur. The AAT2842 offers two high-performance MicroPower low dropout (LDO) linear Regulators A single enable input controls both Regulators and each supplies up to 200mA to the load. Both LDOs consume only 85A quiescent current, making them ideal for battery-operated applications.The AAT2842 is equipped with built-in short-circuit and over-temperature protection. The Charge Pump soft-start circuitry prevents excessive inrush current at start-up. The product is available in a Pb-free, space-saving TQFN44-28 package and operates over the -40C to +85C ambient temperature range.
By Advanced Analogic Technologies, Inc.
AAT2842 's PackagesAAT2842 's pdf datasheet

AAT2842 Pinout, Pinouts
AAT2842 pinout,Pin out
This is one package pinout of AAT2842,If you need more pinouts please download AAT2842's pdf datasheet.

AAT2842 Application circuits
AAT2842 circuits
This is one application circuit of AAT2842,If you need more circuits,please download AAT2842's pdf datasheet.

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