A good PCB layout for optimal thermal performance involves placing the device near a thermal pad or a heat sink, and ensuring good copper pour coverage around the device. Additionally, using a 2-3 layer PCB with a solid ground plane can help to reduce thermal resistance.
To ensure reliable start-up, it is recommended to add a soft-start circuit to the input voltage, and to use a capacitor with a low equivalent series resistance (ESR) at the input. Additionally, adding a noise filter, such as an LC filter, can help to reduce the impact of noise on the power supply.
The maximum allowed voltage transient on the input pin is 20% above the maximum recommended operating voltage, but not exceeding 24V. However, it is recommended to limit the voltage transient to 10% above the maximum recommended operating voltage to ensure reliable operation.
The output voltage ripple can be calculated using the formula: ΔVout = (Iout * Rl) / (f * Cout), where Iout is the output current, Rl is the load resistance, f is the switching frequency, and Cout is the output capacitance.
A low-ESR ceramic capacitor with a value of 10-22uF is recommended for optimal performance. The capacitor should be placed as close to the device as possible to minimize parasitic inductance.
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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.
