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Connector and Test Point Descriptions
4.1.9
J16 VOUT (SMA)
This SMA connector is connected to the output voltage of the TPS62065. It can be used to easily analyze
the noise spectrum of the output voltage with a spectrum analyzer. By default, J16 is not assembled on
the EVM.
4.2
Enable Jumpers/Switches: TPS62067EVM
4.2.1
J20 VIN
This header is the positive connection to the input power supply. The power supply must be connected
between J10 and J12 (GND). The leads to the input supply should be twisted and kept as short as
possible. The input voltage must be between 3.0 V and 6.0 V.
4.2.2
J21 S+/S–
J21 S+/S– are the sense connections for the converter input. Connect a voltmeter, or the sense
connection of a power supply or an oscilloscope, to this header.
4.2.3
J22 GND
This header is the return connection to the input power supply. Connect the power supply between J22
and J20 (VIN). The leads to the input supply should be twisted and kept as short as possible. The input
voltage must be between 3.0 V and 6.0 V.
4.2.4
J23 VOUT
This header is the positive output of the step-down converter. The output voltage of the TPS62067 is
adjustable with the feedback resistors R20 and R21. On the EVM, the output voltage is set to 3.3 V by
default.
NOTE:
There is a feed-forward capacitor required. Refer to the
TPS6206x data sheet
(
SLVS833
)
for detailed information.
4.2.5
J24 S+/S–
J24 S+/S– are the sense connections for the converter output. Connect a voltmeter, or the sense
connection of an electronic load or an oscilloscope, to this header.
4.2.6
J25 GND
J25 is the return connection of the converter. A load can be connected between J25and J23 (V
OUT
). The
converter is capable of a load up to 2,000 mA load current.
4.2.7
J26 PG
PG (Power Good) is an open-drain output. A 1-M
Ω
pull-up resistor is connected between VIN and PG.
This circuit is active once the device is enabled. It is driven by an internal comparatir that is connected to
the FB voltage. The PG output provides a high-level output once the FB voltage reaches 95% of its
nominal value. The PG output provides a low-level output when the FB voltage falls below 90% of its
nominal value.
NOTE:
This function is only available on the TPS62067EVM.
5
SLVU364 – March 2010
TPS62065/67EVM
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