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.
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