Power Supply Configuration - u-blox EVK-JODY-W3 User Manual

3.3 Power supply configuration

JODY-W3 series modules must be supplied with 1.8 V (1V8), 3.3 V (3V3), and a VIO voltage that can
be either 1.8 V or 3.3 V. The power supply for the EVB can be provided over the different host
interfaces or from external sources.
The following power supply options are available on the EVB:
• PCIe, SDIO, USB interfaces: The EVB is powered through the host interface. All internal voltages
are generated by DC-DC converters on the EVB.
• Common external power supply: The EVB can be connected to an external (5 V to 24 V) power
supply through a 2.1 x 6.3 mm DC power jack (J11). DC-DC converters are used for generating all
the required internal voltages.
•
Separate external supplies: All the individual, 3V3, 1V8, and VIO voltage rails are supplied from
external power sources through the connectors J101-J103.
Figure 7 shows the external connectors and jumpers used for configuring the different power supply
options.
Common external
power supply
connector
Jumper for power
supply selection
Figure 7: Overview of EVB power supply configuration
UBX-20030840 - R04
J101-J103 connectors (bottom
side) for separately supplying the
3V3, 1V8 and VIO voltage rails
Board description
EVK-JODY-W3 - User guide
Power supply
status LEDs
Jumpers for input
voltage selection
for the module
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