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关于TPS62130A的PFM/PWM切换点问题

Other Parts Discussed in Thread: TPS62130A

现需要设计一款DC-DC电源,VIN=7.4V,VOUT=3.6V,Imax=3A,在datasheet上可以看到TPS62130A工作在2.5MHz(FSW=LOW)时,PFM和PWM的切换点大概是130mA的样子,在负载电流=100mA位置效率只有85%,而工作在1.25MHz(FSW=HIGH)时,负载电流=100mA的位置效率有90%,但是没有找到PFM/PWM的切换点,有没有人测过这个问题?TI的工程师有木有这个比较准确的答案? 跪求帮助啊,谢谢大家!