Datasheet

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2 I/O Connectors, Setup, and Operation
2.1 Input/Output Connector Descriptions
2.1.1 J1 –VIN
2.1.2 J2 – GND
2.1.3 J3 – VOUT
2.1.4 JP1– EN1
2.1.5 JP2– EN2
2.1.6 TP1
2.1.7 TP2
2.1.8 TP3
2.2 Setup
I/O Connectors, Setup, and Operation
This section describes the jumpers and connectors on the EVM as well as how to properly connect, set
up, and use the TPS718xxEVM-213 and TPS719xxEVM-213.
This header is the positive input connection to the linear regulator. The leads to the input supply should be
twisted and kept as short as possible to minimize inductive droop during a load transient.
This header is the input return connection for the input power supply.
This header provides the output of each linear regulator on the ends, with the ground return on the two
middle pins. Connect the appropriate load for each output to this header.
This jumper enables or disables output 1 of the dual linear regulator. Connect the shorting jumper from the
center EN pin to either the ON or OFF position. This pin should never be left floating.
This jumper enables or disables output 2 of the dual linear regulator. Connect the shorting jumper from the
center EN pin to either the ON or OFF position. This pin should never be left floating.
This test point connects to the input of the dual linear regulator.
This test point connects to output 1 of the dual linear regulator.
This test point connects to output 2 of the dual linear regulator.
The TPS718xx and TPS719xx ICs use the 2-mm X 2-mm SON package. The thermal performance of this
package style and ambient temperature may limit the power dissipation, computed as Pd = (V
IN
- V
O1
) × I
O1
+ (V
IN
- V
O2
) × I
O2
, and therefore maximum output current of each rail. Because the EVM’s regulator output
voltages and board layout are fixed, the regulator’s input voltage, output current, and ambient temperature
are the only variables that can be adjusted to manage power dissipation.
Table 1 shows the maximum input voltage at room temperature and full-rated load current of 200 mA.
Above this voltage, the output current must be reduced to keep the power dissipation of the package
below the maximums stated in the data sheet. Changes in output voltage or ambient temperature affect
these values. Table 1 also shows the minimum input voltage required to produce an output for the linear
regulator. The minimum input voltage is the output voltage plus the necessary dropout voltage at 200-mA
output current.
TPS718xxEVM-213 and TPS719xxEVM-2132 SLVU200 – April 2007
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