Texas Instruments provides a recommended PCB layout in the datasheet, but it's also recommended to follow general high-frequency PCB design guidelines, such as using a solid ground plane, minimizing trace lengths, and using vias to connect the input and output capacitors to the ground plane.
The selection of input and output capacitors depends on the specific application requirements, such as the input voltage range, output voltage, and output current. TI recommends using low-ESR capacitors with a minimum capacitance of 10uF for the input and output. Additionally, the capacitor's voltage rating should be higher than the maximum input voltage.
The TPS51120RHBRG4 has an operating junction temperature range of -40°C to 150°C, but the maximum ambient temperature range depends on the specific application and the thermal design of the system. TI recommends derating the device's power dissipation based on the ambient temperature to ensure reliable operation.
The TPS51120RHBRG4 has a built-in overcurrent protection feature that limits the output current to a maximum of 3.5A. However, if additional overcurrent protection is required, an external current sense resistor can be used to monitor the output current and trigger a shutdown signal to the EN pin in case of an overcurrent event.
The recommended input voltage range for the TPS51120RHBRG4 is 2.7V to 5.5V, but the device can operate with input voltages as low as 2.3V. However, the output voltage regulation and efficiency may be affected at lower input voltages.
TPS51120RHBRG4 datasheet
by Texas Instruments
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