AP7372

Document number: DS46597 Rev. 3 - 2

12 of 15

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May 2025

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AP7372

Application Information (continued)

Thermal Protection

The AP7372 has internal thermal sense and protection circuits. When excessive power dissipation happens on the device, such as short circuit at

the output pin or very heavy load current with a large voltage drop across the device, the internal thermal protection circuit will be triggered, shutting

down the power MOSFET to prevent the LDO from damage. As soon as the excessive thermal condition is removed and the temperature of the

device drops down, the thermal protection circuit will release the control of the power MOSFET, and the LDO device returns to normal operation.

Layout Considerations

For good ground loop and stability, the input and output capacitors should be located close to the input, output, and ground pins of the device. The

regulator ground pin should be connected to the external circuit ground to reduce voltage drop caused by trace impedance. Ground plane is generally

used to reduce trace impedance. Wide trace should be used for large current paths from VIN to VOUT, and load circuit.

Adjustable Output Voltage

The AP7372 is available in 4 fixed output voltage options, ranging from 1.8V to 5.0V. The AP7372 architecture allows any fixed output voltage to be

set to a higher voltage with an external voltage divider. For example, a fixed 5V output can be set to a 6V output according to the following equation:

VOUT = 5V(1 + R1/R2) where R1 and R2 are the resistors in the output voltage divider shown in Figure 1.

Figure 1. Typical Adjustable Output Voltage Application Schematic