Texas Instruments BOOSTXL-CC3135, User Manual

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Hardware Description
9 SWAU106 – January 2019
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Copyright © 2019, Texas Instruments Incorporated
CC3135 SimpleLink™ Wi-Fi
®
BoosterPack™ Development Kit (BOOSTXL-
CC3135)
2.4 Power
The board is designed to accept power from a connected LaunchPad™ kit, or through the
CC31xxEMUBOOST board. Some LaunchPad kits cannot source the peak current requirements of Wi-Fi,
which may be as high as 450 mA. In such cases, the USB connector on the BOOSTXL-CC3135 can be
used to aid the peak current. The use of Schottky diodes ensure that load sharing occurs between the
USB connectors on the LaunchPad kit and the BoosterPack™ module without any board modifications.
Also, the 3.3-V power can be sourced from the LaunchPad kit or from the 3.3-V LDO on the board. This
sourcing is done by using jumper J8. If the LaunchPad kit is unable to source the 3.3 V up to 450 mA,
then J8 must be configured to work from the onboard LDO.
2.4.1 Power From the LaunchPad™ Kit or CC3135EMUBOOST
The most common scenario is powering the BOOSTXL-CC3135 from the connected LaunchPad™ kit. In
this case, the LaunchPad kit provides 3.3 V to the BoosterPack™ module for its operation (see
Figure 4 ).
In addition to the 3.3 V, some LaunchPad kits provide 5 V from the USB (see Figure 5 ), which is used to
drive a 3.3-V LDO on the BoosterPack module. If the LaunchPad kit is unable to provide the 5 V (for
example, the LaunchPad kit with only 20 pins), then the USB connector on the BOOSTXL-CC3135 must
be used to provide the LDO input, as shown in
Figure 5 .
Figure 4. 3.3-V Power From MCU LaunchPad™ Kit