NL2, 6-max, cbet vs minraise

Pacific Poker - $0.02 NL (6 max) - Holdem - 4 players
Hand converted by PokerTracker 4

BTN: 246 BB (VPIP: 67.86, PFR: 53.57, 3Bet Preflop: 16.67, Hands: 28)
SB: 33 BB (VPIP: 11.11, PFR: 5.56, 3Bet Preflop: 0.00, Hands: 18)
Hero (BB): 100 BB
CO: 109 BB (VPIP: 30.43, PFR: 0.00, 3Bet Preflop: 0.00, Hands: 70)

SB posts SB 0.5 BB, Hero posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has A♠ T♠

fold, BTN calls 1 BB, fold, Hero raises to 4 BB, BTN calls 3 BB

Flop: (8.5 BB, 2 players) T♦ 5♣ 5♦
Hero bets 5 BB, BTN raises to 10 BB, fold,

The min-raise intrigues me, because there is not much he can rep: JJ+, Tx and 5x. A flush draw and a lower pair would simply have called. And his stats are telling that he might have a wide range.

Thoughts?