The TPS2202AI PC Card power-interface switch provides an integrated power-management solution for two PC Cards. All of the discrete power MOSFETs, a logic section, current limiting, thermal protection, and power-good reporting for PC Card control are combined on a single integrated circuit (IC), using the Texas Instruments LinBiCMOS™ process. The circuit allows the distribution of 3.3-V, 5-V, and/or 12-V card power by means of the P2C (PCMCIA Peripheral-Control) Texas Instruments nonproprietary serial interface. The current-limiting feature eliminates the need for fuses, which reduces component count and improves reliability. Current-limit reporting can help the user isolate a system fault to a specific card.

The TPS2202AI incorporates a reset function, selectable by one of two inputs, to help alleviate system errors. The reset function enables PC Card initialization concurrent with host platform initialization, allowing a system reset. Reset is accomplished by grounding the V CC and V pp (flash-memory programming voltage) outputs, which discharges residual card voltage.

End equipment for the TPS2202AI includes notebook computers, desktop computers, personal digital assistants (PDAs), digital cameras, handiterminals, and bar-code scanners.

• Fully Integrated VCC and Vpp Switching for Dual-Slot PC Card™ Interface
• P2C™ 3-Lead Serial Interface Compatible With CardBus™ Controllers
• Meets PC Card Standards
• RESET Allows System Initialization of PC Cards
• 12-V Supply Can Be Disabled Except During 12-V Flash Programming
• Short-Circuit and Thermal Protection
• Space-Saving 30-Pin SSOP (DB) Package
• Compatible With 3.3-V, 5-V and 12-V PC Cards
• Power Saving IDD = 83 uA Typ, IQ = 1 uA
• Low rDS(on) (160-m VCC Switch)
• Break-Before-Make Switching

LinBiCMOS and P 2 C are trademarks of Texas Instruments. PC Card and CardBus are trademarks of PCMCIA (Personal Computer Memory Card International Association).