They don't necessarily need to complete the acquisition in a week, just get the broad details negotiated and agreed to. Given the GP's bankruptcy example, if they thought it was worth the risk the acquirer can extend a bare minimum amount of credit to keep the company alive while they do the rest of due diligence and finish the acquisition, folding it into a breakup fee.
Youtube, for one: https://techcrunch.com/2011/10/30/the-entire-1-65b-acquisiti...
Android as well, if I'm remembering correctly.
They don't necessarily need to complete the acquisition in a week, just get the broad details negotiated and agreed to. Given the GP's bankruptcy example, if they thought it was worth the risk the acquirer can extend a bare minimum amount of credit to keep the company alive while they do the rest of due diligence and finish the acquisition, folding it into a breakup fee.