General Description
   The AAT2503 is a three-channel regulator consisting of a step-down converter with an input voltage range of 2.7V to 5.5V plus two low dropout (LDO) linear regulators.

FEATUREs
• 800mA Step-Down Converter
   ▪ VIN Range: 2.7V to 5.5V
   ▪ VOUT Range: 0.9V to VIN
   ▪ High Efficiency
   ▪ 2MHz Switching Frequency
• Two 150mA Low Dropout Regulators
   ▪ LDO Input Voltage Range: 1.62V to 5.5V
   ▪ VOUT Range: 0.6V to VIN
   ▪ High Output Accuracy: ±1.5%
• 85μA of Total IQ
• Independent Enable Pins
• Integrated Power MOSFETs
• Over-Temperature Protection
• QFN34-20 Package
• -40°C to +85°C Temperature Range

APPLICATIONs
• Cellular Phones
• Digital Cameras
• Handheld Instruments
• Microprocessor/DSP Core/IO Power
• PDAs and Handheld Computers