AAT2860 Datasheet (data sheet) PDF





AAT2860 Datasheet, Backlight/Flash LED Driver and Multiple LDO Lighting Management Unit

AAT2860   AAT2860  

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PRODUCT DATASHEET www.DataSheet4U.com A AT2860 Backlight/Flash LED Driver and M ultiple LDO Lighting Management Unit Fe atures • Input Voltage Range: 2.7V to 5.5V • I2C Compatible Serial Interfa ce • Tri-Mode Charge Pump ▪ Drives up to Seven LEDs (Backlight/Flash) • Programmable Backlight Current Settings ▪ 32 Levels - 0.5mA to 31mA • Prog rammable Flash Current ▪ 16 Levels OFF to 300mA • 1MHz Switching Frequ ency • Automatic Soft-Start • Three Low Dropout Regulators ▪ 300mA Outpu t Current ▪ 150mV Dropout ▪ Program mable Output from 1.5V to 3.0V ▪ Outp ut Auto-Discharge for Fast Shutdown • Built-In Thermal Protection • -40°C to +85°C Temperature R

AAT2860 Datasheet, Backlight/Flash LED Driver and Multiple LDO Lighting Management Unit

AAT2860   AAT2860  
ange • TQFN34-24 Package ChargePumpTM General Description The AAT2860-x is a highly integrated charge pump-based l ighting management unit (LMU) with thre e low dropout (LDO) regulators optimize d for single-cell lithium-ion/ polymer systems. The charge pump provides power for all LED outputs; multiple backligh t and flash LED configurations are avai lable. The backlight LED outputs can be programmed up to 31mA each and the fla sh LED outputs can be programmed up to 300mA each. An I2C compatible serial di gital interface is used to enable, disa ble, and set the current to one of 32 l evels for the backlight and one of 16 l evels for the flash. A programmable saf ety timer and flash control input is in cluded for easy flash control. Backligh t current matching is better than 3% fo r uniform display brightness, and flash current matching is better than 5% for uniform power dissipation. The AAT2860 -x offers three high-performance low-no ise MicroPower™ LDO linear regulators . The regulators are enabled and their output voltages are set through the I2C compatible serial interface. Each LDO can supply up to 300mA load current and ground-pin current is only 80µA makin g the AAT2860-x ideal for battery-opera ted applications. The AAT2860-x is avai lable in a Pb-free, space saving TQFN34-24 package and o








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