Texas Instruments TPS7A57EVM-056, User Manual

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2.3 TPS7A57 LDO Operation
The TPS7A57EVM-056 evaluation module contains the TPS7A57 low-dropout regulator (LDO) with input and
output capacitors installed. Additional pads are available to test the LDO with additional input and output
capacitors beyond what is already installed on the EVM. The TPS7A57 LDO can be enabled or disabled by
using the J4 3-pin header.
1. Placing a 2-pin shunt across the header to tie VIN to EN enables the device
2. Placing a 2-pin shunt across the header to tie GND to EN, or leaving the 3-pin header floating, disables the
device
3. Placing a 2-pin shunt across the header to tie GND to CP_EN disables the internal charge pump
Alternatively, by connecting an external function generator to TP2 (EN) and a nearby GND, the user can enable
or disable the TPS7A57 LDO after VIN is applied.
Figure 2-1 shows the result of the TPS7A57EVM-056 during
turn-on. The blue trace is the enable voltage and the pink trace is the output voltage.
Figure 2-1. TPS7A57EVM-056 Turn On
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SBVU075 – APRIL 2022
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