Hardware Design Specification
ASD-B-16-0247 Rev1.3
Page 50 of 105
September 8, 2017
RTK00V2XRC7746SFS
3.20
Power system
3.20.1
Specifications
The Tethys board operates on a single BU12V power supply. The power supplies used for the Tethys board are generated by the
switching regulators and low-dropout regulators.
Because the maximum output current of the AC adapter attached for Tethys board
is 3A at 12v input status, please make sure not to exceed 3A for all sub-board inserted in extending interface connector such as mini
PCIE etc. If end user need more current AC adapter, please prepare over 6A/12V stable AC adapter by end user.
Table 26 List of the Switching Controllers and Regulators on the Tethys Board
Vin
Vout
Switching Controller/Regulator
Power MOSFET
ACC Switch
Control
Power Supply BU12V
Through CN17 or CN18 (1*)
BU12.0V
_________
_________
Not supported
BU12.0V
VSYS
Renesas
R2A11301FT (U36)
Renesas
HAT2210R
(U35 and U37)
supported
BU5.0V
supported
P3.3V
supported
PCIE_5.0V
Texas Instruments
TPS54531DDA(U26)
supported
VSYS
P5.0V
Vishay Siliconix
Si3433CDV-T1-E3(U34)
supported
BU5.0V
BU3.3V
RICOH
RP111N331D-TR-AE(U33)
supported
P3.3V
D3.3V
Vishay Siliconix
SI3433CDV-T1-E3(U40)
supported
D1.5V
Texas Instruments
TPS3808G01DBVT(U45)
supported
D2.5V
RICOH
RP111N251D-TR-AE(U46)
supported
P5.0V
D1.2V
Texas Instruments
TPS54531DDA(U44)
supported
D1.8V
SEMTECH
SC183CULTRT(U38)
supported
D5.0V
Vishay Siliconix
Si3433CDV-T1-E3(U43)
supported
D3.3V
VCCQ_SD2
RICOH
RP111N181D-TR-AE(U12)
supported
VCCQ_SD0
Vishay Siliconix
Supported
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