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 800 mA, 1 A, or 1.1 A load current.

Features
■ 93% Efficiency at 3 MHz
■ 800 mA, 1 A, or 1.1 A Output Current
■ I2C™-Compatible Interface up to 3.4 Mbps
■ 6-bit VOUT Programmable from 0.75 V to 1.975 V
■ 2.7 V to 5.5 V Input Voltage Range
■ 3 MHz Fixed-Frequency Operation
■ Excellent Load and Line Transient Response
■ Small Size, 1 μH Inductor Solution
■ ±2% PWM DC Voltage Accuracy
■ 35 ns Minimum On-Time
■ High-Efficiency, Low-Ripple, Light-Load PFM
■ Smooth Transition between PWM and PFM
■ 37 μA Operating PFM Quiescent Current
■ Pin-Selectable or I2C™ Programmable Output Voltage
■ On-the-Fly External Clock Synchronization
■ 10-lead MLP (3 x 3 mm) or 12-bump CSP Packages

Applications
■ Cell Phones, Smart Phones
■ 3G, WiFi®, WiMAX™, and WiBro® Data Cards
■ Netbooks®, Ultra-Mobile PCs
■ SmartReflex™-Compliant Power Supply
■ Split Supply DSPs and μP Solutions OMAP™, XSCALE™
■ Mobile Graphic Processors (NVIDIA®, ATI)
■ LPDDR2 and Memory Modules