Instructions

USB Connector

TPS62237

DC-DC Converter

Isolation

Jumper Block

eZ-FET lite 5V

eZ-FET lite 3.3V

5V in

3.3V out

MSP430F5529 Target

5529 Target + BoosterPack 5V

5529 Target + BoosterPack 3.3V

MSP430F5529

Target Device

* 5V Isolation

Block Jumper

Disconnected

eZ-FET lite

Hardware

www.ti.com

2.4.3 External 5-V Power Source With USB Connection

In certain situations, it is advantageous to have an external 5-V source and USB connected

simultaneously (see Figure 20). The USB connection may be needed for direct USB communication, back-

channel UART, or to allow for programming through emulation. In this scenario, the 5V jumper in the

isolation block must be disconnected to allow for the two separate 5-V sources. If using external power

source for both 3.3 V and 5 V, consider recommendations for each.

Figure 20. Power Block Diagram for External 5-V Power Source With USB Connection

MSP430F5529 LaunchPad™ Development Tool (MSP

‑

EXP430F5529LP) SLAU533A–September 2013–Revised January 2014

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