UC2879N

Description
The FAN5362 is a 500mA or 705mA, step-down, switching voltage regulator that delivers a fixed output voltage from an input voltage supply of 2.7V to 5.5V. Using a proprietary architecture with synchronous rectification, the FAN5362 is capable of delivering a peak efficiency of 96%, while maintaining efficiency over 90% with load currents as low as 1mA. This regulator transitions seamlessly into and out of 100% duty cycle operation when the supply dips to or below the regulation setpoint and smoothly recovers full regulation without overshoot when the supply recovers.
Features
• 3MHz Fixed-Frequency Operation
• 45µA Typical Quiescent Current
• 1.80 to 3.6V Fixed Output Voltage
• 500mA or 750mA Output Current Capability
• 2.7V to 5.5V Input Voltage Range
• Smooth Transitions to/from 100% Duty Cycle when VIN Drops
• PFM Mode for High Efficiency in Light Load
• Best-in-Class Load Transient Response
• Best-in-Class Efficiency
• Forced PWM and External Clock Synchronization
• Internal Soft-Start
• Input Under-Voltage Lockout (UVLO)
•
Thermal Shutdown and Overload Protection
• 6-Bump WLCSP, 0.4mm Pitch or 6-Lead 2 x 2mm Ultrathin Molded Leadless PackageApplications
• SD Flash Memory Power Supply
• RF Transeiver Power
• Cell Phones, Smart Phones
• Tablets, Netbooks®, Ultra-Mobile PCs
• 3G, LTE, WiMAX™, WiBro®, and WiFi® Data Cards
• Gaming Devices, Digital CamerasDC/DC Micro Modules