TPS2211A

SINGLE-SLOT PC CARD POWER INTERFACE SWITCH

FOR PARALLEL PCMCIA CONTROLLERS

SLVS282A – SEPTEMBER 2000 – REVISED NOVEMBER 2002

15

POST OFFICE BOX 655303

APPLICATION INFORMATION

calculating junction temperature

about 50

°C above ambient. Then calculate the power dissipation for each switch, using the formula:

P

Next, sum the power dissipation and calculate the junction temperature:

T

P

D

Compare the calculated junction temperature with the initial temperature estimate. If the temperatures are not

within a few degrees of each other, recalculate using the calculated temperature as the initial estimate.

ESD protection

All TPS2211A inputs and outputs incorporate ESD-protection circuitry designed to withstand a 2-kV human-body-

model discharge as defined in MIL-STD-883C, Method 3015. The AVCC and AVPP outputs can be exposed to

potentially higher discharges from the external environment through the PC Card connector. Bypassing the out-

puts with 0.1-

µF capacitors protects the devices from discharges up to 10 kV.

SHDN

VPPD0

VPPD1

VCCD0

VCCD1

OC

Internal

Current Monitor

GND

Thermal

CS

CS

S4

S5

S6

13

12

11

10

17

51

18

52

VCC1

VCC2

Vpp1

Vpp2

Card B

S1

S2

S3

3

4

5

6

9

16

15

14

1

2

8

7

CPU

Controller

3.3 V

3.3 V

5 V

5 V

12 V

TPS2211A

See Note A

See Note B

NOTE A: MOSFET switch S6 has a back-gate diode from the source to the drain. Unused switch inputs should never be grounded.

NOTE B: The diagram refers to the 16-pin DB package.

Figure 25. Internal Switching Matrix, TPS2211A Control Logic