The TPS2220B 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 rDS(on) 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.
Single-Slot Switch: TPS2220B
Fast Current Limit Response Time
Fully Integrated VCC and VPP Switching for 3.3 V, 5 V, and 12 V
Meets Current PC Card Standards
Vpp Output Selection Independent of VCC
12-V and 5-V Supplies Can Be Disabled
TTL-Logic Compatible Inputs
Short-Circuit and Thermal Protection
24-Pin HTSSOP and 24-Pin SSOP
140-µA (Typical) Quiescent Current from 3.3-V Input
Break-Before-Make Switching
Power-On Reset
40°C to 85°C Operating Ambient Temperature Range
APPLICATIONS
Notebook and Desktop Computers
Bar Code Scanners
Digital Cameras
Set-Top Boxes
PDAs
PC Card is a trademark of PCMCIA (Personal Computer Memory Card International Association).
