Texas Instruments TPS7A53EVM-080, User Manual, Page: 5 / 17

2.3 TPS7A53A-Q1 LDO Operation and Component Selection
The TPS7A53EVM-080 evaluation module contains the TPS7A53A-Q1 LDO with input, bias, soft-start, output
capacitors, and PG pull-up resistor installed. These six components provide an implementation example, as s
by the white text in
Figure 2-2 . The prepopulated capacitors are sized to make sure the minimum capacitance
requirements are maintained under all normal operating conditions. Optional pads are available to test the LDO
with additional setpoint options, as well as input, bias, and output capacitors beyond what is already installed on
the EVM.
The TPS7A53A-Q1 LDO can be enabled or disabled by using the J8 3-pin header:
• Place a 2-pin shunt across the header to tie VIN to EN to enable the device
• Place a 2-pin shunt across the header to tie GND to EN to disable the device
Alternatively, by connecting an external function generator to TP4 (EN) and a nearby GND connection, the
user can enable or disable the TPS7A53A-Q1 LDO after VIN is applied.
Figure 2-1 shows the result of the
TPS7A53EVM-080 during turn-on. The yellow trace is the input voltage, the green trace is the load current, and
the red trace is the output voltage.
Figure 2-1. TPS7A53EVM-080 Turn-On
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SBVU078 – NOVEMBER 2022
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