惠州PL82051(DC-DC降压IC)

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.