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MIC2566_11

Single-Slot PC Card/CardBus Power Controller

Master Instrument Corporation 

MIC2566

Micrel

System

Power 5V

Supply

PCMCIA

Card Slot

Controller

VCC3IN VCC5IN

EN0

EN1

MIC2566

VCC5_EN

VCC3_EN

VPP1

VPP2 PCMCIA

Card Slot

VCC

Figure 3. PC Card Slot Power Control Application Without an Available 3.3V VCC

Note that VCC3 IN and VCC5 IN are driven together. The MIC2566 is powered by the VCC3 IN line. In this configuration, VCC OUT will be 5V

when either VCC3 or VCC5 is enabled from the logic table. Take advantage of the lower switch resistance of the VCC5 switch by using the

VCC5_EN control as your main VCC switch.

May 2003

9

MIC2566

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