The fight against AIDS and other deadly diseases could get a funding of 11.7 billion dollars as countries around the world took up the commitment to contribute towards the effort.
UN chief Ban Ki-moon announced the commitment at UN headquarters where more than 40 donor countries, private foundations, and corporations were meeting to replenish the Global Fund to Fight AIDS, Tuberculosis and Malaria for 2011 through 2013.
Earlier, Washington said it was contributing what it said was a record four billion dollars to the fund.
"At a time when so many governments are tightening their belts at home, these commitments send a powerful message. It shows how seriously world leaders want to do the right thing beyond their borders," Ban said.
"However the demand for funding is likely to out-strip even the impressive commitments today. That means we must continue to mobilize more resources."
Health GAP, a non-government organization, immediately expressed "profound disappointment" with the US pledge, saying it fell two billion dollars short of what Democratic supporters in Congress were asking for.
But the State Department called the US commitment "an unprecedented three-year pledge of support," adding it is "a 38 percent increase in the US investment over the preceding three-year period."
"The Obama administration intends to seek four billion dollars for the Fund for 2011 through 2013 to continue America?s strong support for this important multilateral partner," it said.