Lieutenant Colonel Paul-Henri Damiba led a mutiny that ousted President Roch Kaboré on Monday.
He blamed the president for failing to contain violence by Islamist militants.
Wearing a red beret and army fatigues, Lt-Col Damiba on Thursday addressed the nation for the first time on national television since taking power.
“When the conditions are right, according to the deadline that our people will define in all sovereignty, I commit to a return to a normal constitutional order,” he said.
Lt-Col Damiba, 41, said he will meet representatives of various sections of society to agree on a roadmap for reform.
“I call on the international community to support our country so it can exit this crisis as soon as possible.”
The military announced that it had seized power on state television on Monday. An army officer cited the deteriorating security situation for the military takeover.
Mr Kaboré had faced growing discontent over his failure to stem an Islamist insurgency.
Lt-Col Damiba has been at the forefront of the fight against Islamist militants. He wrote a book on the topic last year.
Similar troubles in neighbouring Mali led to a military coup in May 2021 – one that was broadly welcomed by the public.
Ecowas meets on Friday to discuss how to respond to the region’s latest coup.