About LMZ317xx’s input capacitor

Hi,

There is a following comment at p12 of LMZ31704's datasheet.
（There is a same comment at p12 of LMZ31710's datasheet.）

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Input Capacitor
The LMZ31704 requires a minimum input capacitance of 44 μF of ceramic type.
An additional 100 μF of nonceramic capacitance is recommended for applications with transient load requirements. The voltage rating of input capacitors must be greater than the maximum input voltage.

At worst case, when operating at 50% duty cycle and maximum load, the combined ripple current rating of the input capacitors must be at least 2 Arms.
Table 6 includes a preferred list of capacitors by vendor. It is also recommended to place a 0.1 μF ceramic
capacitor directly across the PVIN and PGND pins of the device. When operating with split VIN and PVIN rails,
place 4.7μF of ceramic capacitance directly at the VIN pin.
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About input capacitor of LMZ31704 & LMZ31700,our customer would like to use only ceramic capacitors.

1.  Do possible to consist only ceramic capacitor about input capacitor?
2.  If possible to consist only ceramic capacitors, is there any concern?

[User condition #1(LMZ31704)]
 - INPUT Voltage　　 ：　13.5V
 - OUTPUT Voltage　：　3.3V
 - OUTPUT Current　 ：　2.8A
 - Load　　　　　　　　 ：　CPU、Ethernet、Flash ROM

[User condition #2(LMZ31704)]
 - INPUT Voltage　　 ：　13.5V
 - OUTPUT Voltage　：　5V
 - OUTPUT Current　 ：　2.0A
 - Load　　　　　　　　 ：　HDD、USB Bus Power

[User condition #3(LMZ31710)]
 - INPUT Voltage　　 ：　13.5V
 - OUTPUT Voltage　：　1.05V
 - OUTPUT Current　 ：　5.9A
 - Load　　　　　　　　 ：　PCH

[User condition #4(LMZ31710)]
 - INPUT Voltage　　 ：　13.5V
 - OUTPUT Voltage　：　3.3V
 - OUTPUT Current　 ：　4.0A
 - Load　　　　　　　　 ：　PCH、PCI Express


Please give me any advice.

Best regards,