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V

pu(3.3)

SPEED

SOFTCON

RCV

VPO/VO

VP

VM

1.65Vto3.6V

System ASIC

D–

D+

1.5kW

V

BUS

=5V

V

CC(5.0)

OE

V

reg(3.3)

SUSPND

MODE

(A)

VMO/FSE0

V

CC(I/O)

0.1µF

3.3V

V

CC

33 W

33 W

0.1µF

TUSB1105/1106

GND

GND

GND

GND

Peripheral-Side (Full-Speed) Regulator Bypass Mode

TUSB1105, TUSB1106

ADVANCED UNIVERSAL SERIAL BUS TRANSCEIVERS

SCAS818C – MAY 2006 – REVISED DECEMBER 2006

APPLICATION INFORMATION (continued)

A.

Only for TUSB1105

Figure 8. Peripheral-Side (Full-Speed) Regulator Bypass Mode

While operating at full speed, the 1.5-k

Ω resistor must be connected between the D+ line and V

bypass mode. This enables power savings since the regulator is turned off. However, there must be a 3.3-V

supply available on board to implement this operation mode.

14

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