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User's Manual l STK-MBa53 UM 100 l © 2013 TQ-Group
Page 18
4.1.7
Power supply
Illustration 11: Block diagram power supply
The STK-MBa53 is supplied at X8, or optionally at X21, with 12 V and generates 3.3 V and 5 V internally.
To supply external components these three internal supply voltages are additionally routed on pin header X20 (Power-Out).
At this header all three voltages can each provide a maximum of 1 A.
Attention!
Attention!
Attention!
Attention!
To avoid a cross supply and errors in the power-up sequence, the switching regulator for VCC3V3 should be
switched on with VCC_2V775 of the TQMa53.
The following implementation is recommended for a customer design.
Illustration 12: Block diagram power supply (recommended for customer specific carrier board)