USB and SD Card Power switch control ic

Aska

Intellectual 740 points

Other Parts Discussed in Thread: TPS2051, TPS2543, TPS2543EVM-064, TPS2590, TPS2051B

Hi,

Could you help to provide power switch for USB use.

The usb current is 0.5A and Rds(on) the smaller the better.

by the way ,the power switch can use for sd card power control application? thanks.

over 12 years ago

0 Eric Wright over 12 years ago

TI__Mastermind 42795 points

Take a look at TPS2051CDBV (500mA USB Power Switch in 5SOT-23 package).

http://www.ti.com/lit/ds/symlink/tps2051c.pdf

0 Aska over 12 years ago in reply to Eric Wright

Intellectual 740 points

Hi Eric,

Thanks for you reply

The switch for usb 2.0 and sd card application is ok?

0 Eric Wright over 12 years ago in reply to Aska

TI__Mastermind 42795 points

Sorry I missed the SD query. TPS2051CDBV recommended input voltage operating range is 4.5V to 5.5V and as such is not compatible with the high voltage SD card voltage range (2.7V to 3.6V).

But, TPS2051BDBV can be used as it's recommended input voltage operating range is from 2.7V to 5.5V.

0 Aska over 12 years ago in reply to Eric Wright

Intellectual 740 points

Hi Eric,

Thanks,there is another question.
USB application is in the car, if the test Item needs input 16V voltage to USB_VBUS, DP, DM, whether there is any protection methods can suggest? Thank you.

0 Eric Wright over 12 years ago in reply to Aska

TI__Mastermind 42795 points

Ideally, you would need a part rated for that higher voltage. Most protection schemes rely on a stable BUS voltage and ground to clamp to. If VBUS can exceed the ABS MAX voltage of the IC then you don't have anything to clamp the signals to for protection.

In TPS2543 application (see the TPS2543EVM-064), http://www.ti.com/lit/ug/slvu660/slvu660.pdf the DP/M_IN lines are protected from ESD transients using a choke along with a TVS type clamp (TPD2E001DZD).

TPS2590 can operate down to 500mA (minimum) and is rated up to 25V. This part is a load switch, but it's protection behavior is not identical to the TPS2051B.

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USB and SD Card Power switch control ic