General  Description

The APW7085  is  a  2A,  asynchronous,  step-down  converter  with  integrated  100mW P-channel  MOSFET .  The device,  with  current-mode control  scheme,  can  convert 4.5~26V  input  voltage  to  the  output  vol tage  adjustable from  0.8  to  90%  VIN to  provide  excell ent  output  voltage regulation.

Features

• Wide Input V oltage  from 4.5V to 26V

• Output  Current  up  to  2A

• Adjustable  Output V oltage from  0.8V to  90% VIN

- 0.8V Reference V oltage

- –2.5% System Accuracy

• 100mW Integrated P-Channel  Power MOSFET

• High  Efficiency  up  to  91%

- Pulse-Skipping Mode (PSM)  / PWM Mode Operation

• Current-Mode  Operation

- Stable with Ceramic Output Capacitors

-  Fast Transient Response

• Power-On-Reset  Monitoring

• Fixed  380kHz  Switching  Frequency  in  PWM  Mode

• Built-in  Digital  Soft-Start

• Output Current-Limit Protection with Frequency Foldback

• 70%  Under-V oltage  Protection

• Over-T emperature Protection

• <5mA Quiescent Current  During Shutdown

• SOP-8 Package

• Lead Free and Green Devices Available (RoHS Compliant)

Applications

• LCD Monitor / TV

• Set-Top Box

• Portable DVD

• Wireless LAN

• ADSL, Switch HUB

• Notebook Computer

• Step-Down Converters Requiring High  Efficiency and  2A  Output  Current