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AAT2862
Backlight LED Driver and Multiple LDO Lighting Management Unit
Features
•...
PRODUCT DATASHEET
www.DataSheet4U.com
AAT2862
Backlight LED Driver and Multiple LDO Lighting Management Unit
Features
Input Voltage Range: 2.7V to 5.5V Tri-Mode Charge Pump ▪ Drives up to Eight LEDs ▪ 32 Programmable Backlight Current with Auto-fade ▪ Settings Ranging From 500μA to 30mA ▪ Drives up to Two Auxiliary LEDs ▪ 1MHz Switching Frequency ▪ Automatic Soft Start ▪ I2C Selectable Drivers Four Linear
Regulators ▪ 200mA Output Current ▪ 200mV Dropout ▪ I2C Programmable Output Voltage from 1.2V to 3.3V ▪ Output Auto-Discharge for Fast Shutdown Built-In Thermal Protection Automatic Soft Start -40°C to +85°C Temperature Range TQFN34-24 Package
ChargePumpTM
General Description
The AAT2862 is a highly integrated charge pump-based lighting management unit with four linear
regulators optimized for single-cell lithium-ion/polymer systems. The charge pump provides power for all LED outputs and multiple LED configurations are available. The LED outputs can be programmed up to 30mA each and two LED outputs can be programmed up to 60mA each. An I2C serial digital interface is used to enable, disable, and set the current to one of 32 levels. Current matching is better than 3% for uniform display brightness, and high current matching is better than 5% for uniform power dissipation. The AAT2862 also offers four high-performance lownoise MicroPower™ low dropout (LDO) linear
regulators. The
regulators are enabled and their output voltages are set through the I2C serial in...