Peers took part in a debate on the Global Fund which fights Aids, tuberculosis (TB) and malaria in the developing world on 4 July 2012, led by Conservative peer Lord Fowler.
In May, MPs urged the UK government to give more money to the Global Fund.
The International Development Committee expressed concern that extra funding - pledged by ministers over a year ago - had not materialised.
The fund has faced allegations of fraud, a shortfall from donors and a change of leadership.
Ministers say they will increase donations once they are convinced by the fund's reform programme.
The MPs' report described how the Global Fund has approved grants worth £14.1bn in 150 countries since it began work a decade ago.
It currently provides about 65% of all international financing to combat TB and malaria - and 21% of the money used against Aids.