Texas Instruments TPS7B4255EVM-062, User Manual, Page: 5 / 20

3 Setup
This section describes the jumpers and connectors on the EVM, and how to properly connect, set up, and use
the TPS7B4255EVM-062.
Section 3.1 and Section 3.3 describe the test setup and operation for the TPS7B4255-
Q1 LDO. Section 3.2 and Section 3.4 describe the test setup and operation of the optional load transient circuit.
3.1 LDO Input/Output Connector Descriptions
3.1.1 VIN and GND
VIN and GND are the connection terminals for the input supply. The VIN terminal is the positive connection, and
the GND terminal is the negative (that is, ground) connection.
3.1.2 VOUT and GND
VOUT and GND are the connection terminals for the output load. The VOUT terminal is the positive connection,
and the GND terminal is the negative (that is, ground) connection.
3.1.3 EN
EN is a 3-pin header used to enable or disable the TPS7B84-Q1, which in turn enables the TPS7B4255-Q1.
The center pin of the 3-pin header is tied to the TPS7B84-Q1 EN input. When the 2-pin shunt is placed across
the right two pins of the header, VIN is shorted to EN and the TPS7B84-Q1 is enabled. When the 2-pin shunt is
placed across the left two pins of the header, GND is shorted to EN and the TPS7B84-Q1 is disabled.
If the TPS7B84-Q1 is not to be used to supply the ADJ/EN signal for the TPS7B4255-Q1, remove jumper J11
and use TP1 to drive ADJ/EN directly, or a combination of J5, R1, R3, C10 to configure ADJ/EN to be a function
of the input voltage.
www.ti.com Setup
SLVUCA5 – JUNE 2022
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