Description
The FAN5355 device is a high-frequency, ultra-fast transient response, synchronous step-down DC-DC converter optimized for low-power applications using small, low-cost inductors and capacitors. The FAN5355 supports up to 800mA or 1A(1) load current.

FEATUREs
■ 91% Efficiency at 3MHz
■ 800mA or 1A Output Current(1)
■ 2.7V to 5.5V Input Voltage Range
■ 6 or 7-bit VOUT Programmable from 0.75 to 1.975V
■ 3MHz Fixed-Frequency Operation
■ Excellent Load and Line Transient Response
■ Small Size, 1μH Inductor Solution
■ ±2% PWM DC Voltage Accuracy
■ 35ns Minimum On-Time
■ High-Efficiency, Low-Ripple, Light-Load PFM
■ Smooth Transition between PWM and PFM
■ 37μA Operating PFM Quiescent Current
■ Software Selectable 25kHz Minimum PFM Frequency Prevents Audible Noise in PFM Mode
■ I2C™-Compatible Interface up to 3.4Mbps
■ Pin-Selectable or I2C™ Programmable Output Voltage
■ On-the-Fly External Clock Synchronization
■ 10-lead MLP (3 x 3mm) or 12-bump CSP Packages

APPLICATIONs
■ SmartReflex™-Compliant Power Supply
■ Split Supply DSPs and μP Solutions OMAP™, XSCALE™
■ Cell Phones, Smart Phones, PDAs, Digital Cameras, and Portable Media Players
■ Micro DC-DC Converter Modules
■ Handset Graphic Processors (NVIDIA®, ATI)