The University of Michigan released its survey on consumer sentiment, showing a surge to 100.8 in September, the best in six months, from 96.2 in August, beating estimates of 96.7.
As of 02:06 GMT, the dollar index rose 0.23% to 94.74 against a basket of major rivals, with a session-high at 94.77, and the lowest since July 31 at 94.36.
The current economic conditions gauge in the same survey rose to 116.1 from 110.3, while economic outlook rose to 91.1 from 87.1.
One-year inflation outlook fell to 2.8% from 3.0% in August, while five-year outlook fell to 2.4% from 2.6%.