You can put 5% of the purchase price down for a home valued at $500,000 or less, any amount above $500,000 requires 10%, and homes valued at $1,000,000+ require a 20% down payment. These values can be combined, see example:
$500,000 or less = 5% of the purchase price
$500,000 - $999,999 = 5% of the first $500,000, and then 10% of the remaining purchase price