cameraTopDown_Klee.cs

public GameObject targetObj;
public float smooth = 1;
Vector3 offsetValue;

void Start() {

    offsetValue = transform.position - targetObj.transform.position;
}

void LateUpdate() {

    Vector3 initPosition = targetObj.transform.position + offsetValue;
    Vector3 position = Vector3.Lerp(transform.position, initPosition, Time.deltaTime * smooth);
    transform.position = position;
    transform.LookAt(targetObj.transform.position);

}