AAT1142

800mA Voltage-Scaling Step-Down Converter General Description The AAT1142 SwitchReg is a dynamically programmable 2.2MHz step-down converter with an input voltage range of 2.7V to 5.5V and output from 0.6V to 2.0V. Its low supply current, high level of integration, and small footprint make the AAT1142 the ideal choice for microprocessor core power in systems such as smartphones. The 2.2MHz switching frequency allows the use of a small external inductor and capacitors. Peak current mode control and internal compensation provide stable operation and fast voltage response without over/undershoot or ringing. The AAT1142 delivers up to 800mA of output current while consuming 35µA of typical no load quiescent current. Dynamic Voltage Management is provided through I2C or AnalogicTech's S2Cwire™ (Simple Serial Control™) single wire interface. The user can program the output from 0.6V to 2.0V in 50mV steps. AAT1142 Features SwitchReg™ Typical Application VIN: 2.7V to 5.5V The AAT1142 optimizes power efficiency throughout the load range via PWM/PFM mode. Pulling www.DataSheet4U.com the MODE/SYNC pin high enables PWM Only mode, maintaining constant frequency and low noise across the operating range. Alternatively, the converter may be synchronized to an external clock input via the MODE/SYNC pin. Over-temperApplications ature and short-circuit protection safeguard the AAT1142 and system components from damage. Camcorders The AAT1142 is available...