Não consegue achar o driver

PHP Fatal error: Uncaught PDOException: could not find driver in C:\Users\julio \OneDrive\Documentos\CCA\PHP\PDO-PHP\conexao.php:4 Stack trace:

#0 C:\Users\julio\OneDrive\Documentos\CCA\PHP\PDO-PHP\conexao.php(4): PDO->__con struct()

#1 {main} thrown in C:\Users\julio\OneDrive\Documentos\CCA\PHP\PDO-PHP\conexao.php on li ne 4

conexao.php

$caminho = __DIR__ . '/banco.sqlite';
$pdo = new PDO('sqlite:' . $caminho);

já habilitei as extensões do php.ini

; Directory in which the loadable extensions (modules) reside.
; http://php.net/extension-dir
extension_dir = "./"
; On windows:
extension_dir=ext

;extension=pdo_mysql
;extension=pdo_oci
;extension=pdo_odbc
;extension=pdo_pgsql
extension=pdo_sqlite
;extension=pgsql
;extension=shmop

alguém me ajude a resolver, desde já agradeço pela ajuda :)