MIC2568 查看數據表（PDF） - Micrel

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MIC2568

Dual-Slot PC Card/CardBus Power Controller

Micrel 

MIC2568

5V-Only VCC Application

To use the MIC2568 in applications where only a single 5V

VCC is available (no 3.3V VCC), connect VCC5 (5V supply) to

the VCC3 IN pin. Refer to Figure 4. In this configuration, VCC

OUT will be 5V when either VCC3 switch or VCC5 switch is

enabled.

Address and data lines

between logic controller and

PCMCIA cards not shown.

Dual-Slot

PC Card

Logic Controller

System Power Supply

5V

A⁄BVCC3 IN A⁄BVCC5 IN

A EN1

A EN0

A VCC5 EN

A VCC3 EN

B EN1

B EN0

B VCC5 EN

B VCC3 EN

A VPP OUT

A VCC OUT

MIC2568-0

Power

Controller

GND

B VPP OUT

B VCC OUT

Slot A

VPP1

VPP2

VCC

VCC

Slot B

VPP1

VPP2

VCC

VCC

Motherboard

Figure 4. 5V-Only VCC Application

PC Card

A

PC Card

B

Micrel

May 2003

9

MIC2568

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