Product Description

The California Micro Devices’ SmartORTM CMPWR280 is a fully protected Dual-Input low-dropout CMOS regulator that also provides the necessary control signal for driving an external auxiliary P-channel MOSFET switch. The SmartORTM device automatically selects one of three possible inputs on a priority basis: VCC (1.5A), VSBY (375mA) or VAUX via the drive signal used to control an external switch.

Features

• Selects from 3 input voltages and provides 3.3V output

• Automatic selection of VCC, VSBY or VAUX

• Drive control signal for external VAUX switch

• Glitch-free 3.3V output during supply transitions

• Built-in hysteresis for supply selection

• VCC regulates up to 1.5A output current

• VSBY regulates up to 375mA output current

• Foldback current limiting

• Thermal shutdown with hysteresis

• TO-263 standard and thin-body packages

• Lead-free versions avilable

Applications

• Peripheral Component Interface (PCI) Adapter Cards

• Network Interface Cards (NICs)

• Multiple Powered Systems

• Systems with Standby Capabilities