The phrase "drawn down on" is correct and usable in written English.
It can be used in contexts where someone is utilizing or accessing a resource, often in financial or military terms.
Example: "The company has drawn down on its credit line to cover the unexpected expenses."
Alternatives: "tapped into" or "utilized".
As you drawn down on the latter savings, you put back money when you can to maintain a certain level to handle unplanned expenses.
The moths had arrived in the stadium before the footballers – almost certainly drawn down on the previous night when the floodlights were reportedly left on.
The steel gates on the Tortilleria Chinantla tortilla factory in Bushwick, Brooklyn, were drawn down on Monday morning, a telltale sign that something at the usually bustling seven-day-a-week plant was amiss.
Yet in nearly every year since 2000, the museum has drawn down on the principal of its endowment to pay for operations, a practice frowned upon as risky in the museum world.
Donald F. McGahn, a lawyer at Jones Day and former chairman of the Federal Election Commission who is representing Mr. Trump, said the construction loan was not initially disclosed because the Trump Organization had not drawn down on it as of the date listed on the 2015 Federal Election Commission filing.
Harvey Lichtenstein, chairman of the development corporation and longtime head of the Brooklyn Academy of Music from which the group takes its name, said that despite tough economic times, the financing from the city "is secure and we have drawn down on the money".
In the bad years they draw down on these reserves.
And we have been drawing down on centuries of accumulation.
It later added, "For global cash management reasons, we elected to draw down on our revolver".
Many are wrestling with whether, or how much, to draw down on their retirement accounts.
The west could draw down on strategic oil supplies to limit the impact of the loss of Russian supply.
