Texas Instruments provides a recommended PCB layout in the datasheet, but it's also important to follow general best practices for switching regulator layouts, such as keeping the input and output capacitors close to the IC, using a solid ground plane, and minimizing trace lengths and widths.
To ensure stability, make sure to follow the recommended component values and PCB layout, and also consider the output capacitor's ESR (Equivalent Series Resistance) and ESL (Equivalent Series Inductance) values. Additionally, adding a small ceramic capacitor (e.g. 10nF) between the VOUT and GND pins can help improve stability.
The maximum input voltage rating for the LM2748MTC/NOPB is 42V, but it's recommended to operate the device within the specified input voltage range (7V to 36V) for optimal performance and reliability.
The LM2748MTC/NOPB is rated for operation up to 125°C, but it's essential to consider the device's power dissipation and thermal management when operating in high-temperature environments. Make sure to follow the recommended thermal design and layout guidelines to ensure reliable operation.
The output voltage of the LM2748MTC/NOPB is set by the resistor divider network (R1 and R2) connected to the FB pin. The output voltage can be calculated using the formula: VOUT = 0.8V x (1 + R2/R1).
LM2748MTC/NOPB datasheet
by Texas Instruments
