BU9457KV-E2 - ROHM Semiconductor

BU9457KV-E2 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-capacitance load?
  To ensure stable operation with a high-capacitance load, add a 1-10nF ceramic capacitor between the output pin and GND, and a 1-10uF electrolytic capacitor between the input pin and GND. This will help reduce oscillation and improve stability.
• What is the maximum allowed voltage on the enable pin (EN)?
  The maximum allowed voltage on the enable pin (EN) is 6V. Exceeding this voltage may cause damage to the device.
• Can I use the BU9457KV-E2 in a high-temperature environment?
  The BU9457KV-E2 is rated for operation up to 105°C. However, it's essential to consider the derating curve and ensure the device does not exceed the maximum junction temperature (Tj) of 150°C.
• How do I calculate the power dissipation of the BU9457KV-E2?
  Power dissipation (PD) can be calculated using the formula: PD = (VIN x IIN) + (VOUT x IOUT) + (VIN x Iq), where Iq is the quiescent current. Ensure the calculated PD does not exceed the maximum rating of 2.5W.