BD7LS34G-CTL - ROHM Semiconductor

BD7LS34G-CTL Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal thermal performance?
  ROHM recommends a thermal pad on the bottom of the package, connected to a large copper area on the PCB to dissipate heat efficiently. A minimum of 2oz copper thickness is recommended.
• How do I ensure stable operation with a high-impedance input source?
  To ensure stable operation with a high-impedance input source, add a 1kΩ to 10kΩ resistor in series with the input pin to prevent oscillation. Additionally, consider adding a 10nF to 100nF capacitor in parallel with the input pin to filter out noise.
• What is the maximum allowed voltage on the enable pin (EN)?
  The maximum allowed voltage on the enable pin (EN) is 6V, which is higher than the recommended operating voltage of 5V. However, it's essential to ensure the EN pin voltage does not exceed the supply voltage (VIN) to prevent damage.
• Can I use the BD7LS34G-CTL in a high-temperature environment?
  While the BD7LS34G-CTL is rated for operation up to 125°C, it's essential to consider the derating of the maximum junction temperature (Tj) and the package thermal resistance (Rthja) when operating in high-temperature environments. Consult ROHM's application notes for guidance on thermal design and derating.
• How do I minimize electromagnetic interference (EMI) when using the BD7LS34G-CTL?
  To minimize EMI, use a shielded layout, keep the switching node (SW) as short as possible, and add a 10nF to 100nF capacitor between the SW pin and GND. Additionally, consider adding a common-mode choke or a ferrite bead in series with the input or output lines.