1 Features
? 3.5A continuous output current capability
? Up to 98% duty
? 4.6V to 33V wide operating input range
? Integrated 40V, 80mΩ high side and 40V, 50mΩlow side power MOSFET switches
? Up to 97% efficiency
? CV/CC Mode control (Constant voltage and constantcurrent).
? Internal Soft-Start limits the inrush current at turn-on
? Fixed 160KHz Switching Frequency
? Internal compensation to save external components
? Pulse Skipping Mode to Achieve High Light LoadEfficiency
? Frequency jittering toease EMI Issue
? Peak Current-Mode Control
? Cycle-by-Cycle Over Current Protection
? Input over-voltage protection
? Output Over-Voltage Protection
? Output short protection
? Over-Temperature Protection
? Available in ESOP8 Package
2 Applications
? 9-V, 12-V and 24-V Distributed Power Systems
? Consumer Applications Such as HomeAppliances,Set-Top Boxes, CPE Equipment, LCDDisplays, Peripherals, and Battery Chargers
? Industrial and Car Entertainment Power Supplies
3 Description
The PL82051 is a monolithicsynchronous buck regulator with wide operating input voltage range from 4.6to 33V.
Current mode control with internal slope compensation is implemented to reduce component count.
PL82051 also features a light load pulse skipping mode,which allows for a power loss reduction from the inputpower supply to the system at light loading.Frequency spread spectrum operation is introduced forEMI reduction.
A cycle-by-cycle current limit with frequency fold backprotects the IC at over loading condition.