AUR9718

Data Sheet 1.5MHz, 1.5A, Step-down DC-DC Converter AUR9718 General Description The AUR9718 is a high efficiency step-down DC-DC voltage converter. The chip operation is optimized by peak-current mode architecture with built-in synchronous power MOSFET switchers. The oscillator and timing capacitors are all built-in providing an internal switching frequency of 1.5MHz that allows the use of small surface mount inductors and capacitors for portable product implementations. Additional features including Soft Start (SS), Under Voltage Lock Out (UVLO), Thermal Shutdown Detection (TSD) and short circuit protection are integrated to provide reliable product applications. The device is available in adjustable output voltage versions ranging from 0.8V to 0.9×VIN when input voltage range is from 2.7V to 5.5V, and is able to deliver up to 1.5A. The AUR9718 is available in DFN-3×3-6 package. Features High Efficiency Buck Power Converter Low RDS(ON) Internal Switches : 150mΩ Output Current: 1.5A Adjustable Output Voltage from 0.8V to 0.9×VIN Wide Operating Voltage Range: 2.7V to 5.5V Built-in Power Switchers for Synchronous Rectification with High Efficiency Feedback Voltage: 800mV 1.5MHz Switching Frequency Thermal Shutdown Protection Low Drop-out Operation at 90% Duty Cycle No Schottky Diode Required Applications LCD TV Set Top Box Post DC-DC Voltage Regulation PDA and Notebook Computer DFN-3×3-6 Figure 1. Package Type of AUR9718 May. 2012 Rev. 1.0 B...