TUSB1105 datasheet(18/30 Pages) TI

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pu(3.3)

CC(5.0)

reg(3.3)

1.65Vto 3.6V

System ASIC

15kW

BUS

=5V

D–

D+

SPEED

SOFTCON

RCV

VPO/VO

SUSPND

MODE

(A)

VMO/FSE0

CC(I/O)

0.1µF

33 W

0.1µF

15kW

TUSB1105/1106

GND

Host-Side (VCC(5.0) Supplied From VBUS Pin)

TUSB1105, TUSB1106

ADVANCED UNIVERSAL SERIAL BUS TRANSCEIVERS

SCAS818C – MAY 2006 – REVISED DECEMBER 2006

APPLICATION INFORMATION (continued)

Only for TUSB1105

Figure 12. Host-Side (VCC(5.0) Supplied From VBUS Pin)

If there is no 3.3-V supply on board, the VBUS supply can support the USB-side power needs. The on-chip

regulator generates the 3.3-V internal supply rail, which is required for the USB signal levels. The logic-side I/Os

can operate at any voltage range from 1.65 V to 3.6 V. Powering VCC(5.0) through the VBUS port of the USB

connector realizes significant power saving for portable applications, such as cell phones, PDAs, etc. In this

operating mode, the ICC(5.0) current is fed from the external source. The USB-side power consumption, ICC(5.0) is

4 mA, as opposed to logic-side ICC(IO) of 1 mA under full-speed operation.

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TUSB1105 Datasheet(PDF) 18 Page - Texas Instruments