A 4-layer PCB with a solid ground plane and a separate power plane is recommended. Keep the input and output capacitors close to the IC, and use short, wide traces for the power paths. Refer to the TI application note 'PCB Layout Guidelines for Switching Regulators' for more details.
Choose an inductor with a high saturation current rating, low DC resistance, and a suitable inductance value (e.g., 1-10 μH). Consider the inductor's physical size, core material, and operating frequency. TI's 'Inductor Selection Guide' can help with the selection process.
The BQ24253RGER can handle input voltages up to 18V, but it's recommended to keep the input voltage below 15V to ensure reliable operation and minimize power losses.
Use the FB (feedback) pin to set the output voltage. Connect a resistive divider from the output voltage to the FB pin, and calculate the resistor values using the formula provided in the datasheet. For example, for a 5V output, use R1 = 10 kΩ and R2 = 2 kΩ.
The EN pin is used to enable or disable the regulator. Tie the EN pin to VIN (input voltage) to enable the regulator, or tie it to GND to disable it. You can also use an external signal to control the EN pin for dynamic voltage scaling or power sequencing.
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
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