TPS2220B

单 PC 卡串行接口电源开关

The power-interface switch provides an integrated power-management solution for single Card sockets. The device allows the controlled distribution of 3.3 V, 5 V, and 12 V to one card slot. The current-limiting and thermal-protection features eliminate the need for fuses. Current-limit reporting helps the user isolate a system fault. The switch rDSon and current-limit values have been set for the peak and average current requirements stated in the PC Card specification, and optimized for cost.

Like the TPS2220A this device supports independent VPP/VCC switching. The TPS2220B is pin compatible with the TPA2220A execept for pin 20 of the TPS2220B which has no connection.

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Single-Slot Switch: TPS2220B

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Fast Current Limit Response Time

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Fully Integrated VCC and VPP Switching for 3.3 V, 5 V, and 12 V

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Meets Current PC Card™ Standards

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Vpp Output Selection Independent of VCC

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12-V and 5-V Supplies Can Be Disabled

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TTL-Logic Compatible Inputs

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Short-Circuit and Thermal Protection

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24-Pin HTSSOP and 24-Pin SSOP

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140-µA Typical Quiescent Current from 3.3-V Input

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Break-Before-Make Switching

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Power-On Reset

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–40°C to 85°C Operating Ambient Temperature Range

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APPLICA ONS

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Notebook and Desktop Computers

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Bar Code Scanners

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Digital Cameras

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Set-Top Boxes

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PDAs

PC Card is a trademark of PCMCIA Personal Computer Memory Card International Association.

PowerPAD is a trademark of Texas Instruments.