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Placement of LMZ317 series Power modules

Yashasvini K
Prodigy 40 points
Other Parts Discussed in Thread: LMZ31710, LMZ31704, SN74LVCH16T245-EP

Hi,

We are using LMZ317 series power modules to generate required on board voltages. During PCB design, we are facing space limitations. Please suggest
 
1. Can two power modules (A and B) be placed back to back, one on top side and one on bottom side of PCB  
   A:LMZ31710, 5 VIN, 3.3 VOUT, 8.5A
   B:LMZ31710, 12 VIN, 1.8 VOUT, 4.5A
 
2. Can two power modules (C and D) be placed back to back, one on top side and one on bottom side of PCB  
   C:LMZ31704, 12 VIN, 2 VOUT, 1A, used as VCCAUXIO supply input to Virtex-7 FPGA
   D:LMZ31704, 12 VIN, 2.5 VOUT, 0.5A
 
3. Can Dual supply transceiver (SN74LVCH16T245-EP : 1.8V to 5.5V) of Discrete signals be placed in bottom side of LMZ31710 Power module
   Case 1: Transceiver in bottom side of LMZ31710(12 VIN, 1 VOUT, 7.5 A, used as GTH power supply of Virtex-7 FPGA)
   Case 2: Transceiver in bottom side of LMZ31710(12 VIN, 1.8 VOUT, 3.5 A, used as VCCAUX power supply of Virtex-7 FPGA)
 
4. Also please let us know any considerations to be made if placed back to back


Thanks,

Yashasvini K