Texas Instruments provides a recommended PCB layout in the datasheet, but it's also recommended to follow general guidelines for switching regulator layout, such as keeping the input and output capacitors close to the IC, and using a solid ground plane to reduce noise and EMI.
The output voltage ripple of the TL4050A25IDCKR can be calculated using the formula: ΔVout = (Iout * ESL) / (Cout * fsw), where ESL is the equivalent series inductance of the output capacitor, Cout is the output capacitance, and fsw is the switching frequency. The datasheet provides a graph to estimate the output voltage ripple based on the output capacitance and load current.
The TL4050A25IDCKR has an absolute maximum input voltage rating of 18V, but it's recommended to operate the device within the recommended input voltage range of 7V to 15V to ensure reliable operation and to prevent damage to the internal components.
To ensure stability, it's recommended to follow the datasheet guidelines for component selection, such as using a minimum output capacitance of 10uF and a minimum ESR of 0.1Ω. Additionally, the input and output capacitors should be placed close to the IC, and the PCB layout should be designed to minimize parasitic inductance and capacitance.
The TL4050A25IDCKR has a thermal derating of 12.5mW/°C above 25°C, which means that the maximum power dissipation decreases by 12.5mW for every degree Celsius above 25°C. This should be taken into account when designing the thermal management of the system.
TL4050A25IDCKR datasheet
by Texas Instruments
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