MAX17599's frequency jitter range is ±10%. It is not recommended to surpass this range. When you do, it is possible to cause issues such as additional ripple voltage, lower efficiency, and other problems.
MAX17599
Production
The MAX17598/MAX17599 low IQ, active clamp current-mode PWM controllers contain all the control circuitry required for the design of wide-input isolated...
Datasheet
MAX17599 on Analog.com
MAX17599's frequency jitter range is ±10%. It is not recommended to surpass this range. When you do, it is possible to cause issues such as additional ripple voltage, lower efficiency, and other problems.