TUSB1210 datasheet(55/66 Pages) TI1

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TUSB1210

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SLLSE09H – NOVEMBER 2009 – REVISED JUNE 2015

6.3

Power Supply Recommendations

VBUS, and VBAT, and VDDIO, are needed for power the TUSB1210. Recommended operation is for VBAT to

be present before VDDIO. Applying VDDIO before VBAT to TUSB1210 is not recommended as there is a

diode from VDDIO to VBAT which will be forward biased when VDDIO is present but VBAT is not present.

TUSB1210 does not strictly require VBUS to function.

6.3.1

TUSB1210 Power Supply

•

The VDDIO pins of the TUSB1210 supply 1.8 V (nominal) power to the core of the TUSB1210. This

power rail can be isolated from all other power rails by a ferrite bead to reduce noise.

•

The VBAT pin of the TUSB1210 supply 3.3 V (nominal) power rail to the TUSB1210. This power rail can

be isolated from all other power rails by a ferrite bead to reduce noise.

•

The VBUS pin of the TUSB1210 supply 5.0 V (nominal) power rail to the TUSB1210. This pin is

normally connected to the VBUS pin of the USB connector.

•

The VBUS pin of the TUSB1210 supply 5.0 V (nominal) power rail to the TUSB1210. This pin is

normally connected to the VBUS pin of the USB connector.

Application, Implementation, and Layout

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TUSB1210 Datasheet(PDF) 55 Page - Texas Instruments