AUR9721

Data Sheet 5V, 2A, 1.5MHz, Step-down DC-DC Converter AUR9721 General Description The AUR9721 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 MOS 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 2A. The AUR9721 is available in DFN-3×3-10 package. Features High Efficiency Buck Power Converter Output Current: 2A Adjustable Output Voltage from 0.8V to 0.9×VIN Wide Operating Voltage Range: 2.7V to 5.5V Built-in Power Switches for Synchronous Rectification with High Efficiency Feedback Voltage Allows Output: 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 PCI Card PDA and Notebook Computer DFN-3×3-10 Figure 1. Package Type of AUR9721 Aug. 2012 Rev. 1.0 BCD Semiconductor Man...