ROHM recommends a thermal pad size of 2.5mm x 2.5mm with a minimum of 10 thermal vias (0.3mm diameter) to achieve optimal thermal performance. Additionally, a solid copper plane on the bottom layer can help to dissipate heat efficiently.
To ensure stable operation with a high-ESR output capacitor, ROHM recommends using a capacitor with an ESR of 10Ω or less, and adding a 1nF to 10nF ceramic capacitor in parallel to the output capacitor to improve stability.
The maximum allowed voltage on the EN pin is 6V. Exceeding this voltage may cause damage to the device. It's recommended to use a voltage limiter or a resistor divider network to ensure the EN pin voltage remains within the specified range.
The BD49L34G-TL is rated for operation up to 105°C. However, the device's performance and reliability may degrade at high temperatures. ROHM recommends derating the output current and voltage according to the temperature derating curve provided in the datasheet.
The power dissipation of the BD49L34G-TL can be calculated using the formula: Pd = (Vin - Vout) x Iout + (Vin x Iq), where Vin is the input voltage, Vout is the output voltage, Iout is the output current, and Iq is the quiescent current. ROHM recommends using the maximum values for Vin, Vout, Iout, and Iq to ensure a safe margin.
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