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Supply Current Measurement

• Remove the jumpers VCC and RST of J3 header of the launchpad

• Set the desired delay, configuring S1 (from position 2 to 4).

• Set the POWER GOOD source, configuring S1 (position 1), if you set external source connect the

voltage source between the EXT_PGOOD and GND test points; do not turn on this voltage source.

Refer to the data sheet regarding the allowable voltage range. This can be found on the MSP430

LaunchPad Wiki (MSP430 LaunchPad (MSP-EXP430G2) Wiki).

• Configure I_SEL as explained in Section 2.1.

• Plug the eval board in to the launchpad according to Table 2

Table 2. TPL5100EVM to Launchpad Connection

TPL5100EVM MSP430 Launchpad

J1_10 J1

J11_20 J2

VCC VCC of J3

RST RST of J3

• Insert a 2032 coin cell battery in the battery holder (BT) or alternatively connect a voltage source

between the SUPPLY and GND test points. DO NOT CONNECT THE COIN CELL BATTERY AND

THE VOLTAGE SOURCE TO SUPPLY THE EVALUATION BOARD AT SAME TIME.

• Power on the voltage sources connected to the EVM.

2.2.1.1 SOFTWARE OF THE MSP430

The code in Section 5 of this User's Guide, once loaded into the MSP430 of the launchpad, performs the

following features:

• At power on, the red LED present on the Launchpad is turned ON.

• The red LED is turned off when the TPL5100 turns off the MSP430.

2.2.2 EVM Standalone

• Connect your micro controller to IO header, in order to manage the I/O signal of the DUT.

• Insert a 2032 coin cell battery in the battery holder (BT), or alternatively connect a voltage source

between the SUPPLY and GND test points. DO NOT CONNECT THE COIN CELL BATTERY AND

THE VOLTAGE SOURCE TO SUPPLY THE EVALUATION BOARD AT SAME TIME.

• Power on the voltage sources connected to the EVM.

• DO NOT LEAVE DONE PIN (4th pin of IO header) FLOATING. If supervisor feature is not needed,

connect DONE pin to GND.

3 Supply Current Measurement

The TPL5100EVM offers 2 ways to measure the current consumption of the DUT. First, disconnect the

TPL5100 from the launchpad or your micro controller, in order to not load the digital output pins of the

DUT.

3.1 DIRECT MEASUREMENT

• Leave the I_SEL 3-pin header open.

• DO NOT LEAVE DIGITAL INPUT PINS FLOATING, for instance:

– Short the DONE pin (4th pin of IO header) to GND

– Set PGOOD =1 (see Table 1)

• Connect a Digital Multi Meter, configured as the current meter (able to measure nA), between TP1 and

VDD test points.

• Read the current consumption on the DMM.

SNAU148A–JUNE 2013–Revised JULY 2013 TPL5100EVM User's Guide

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