SM91534AL-E - Bourns

SM91534AL-E Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance?
  Bourns recommends a symmetrical PCB layout with a solid ground plane, and keeping the input and output traces as short as possible. Additionally, it's recommended to use a 4-layer PCB with a dedicated power plane and a dedicated ground plane.
• How do I ensure the device operates within the specified temperature range?
  The SM91534AL-E is rated for operation from -40°C to 125°C. Ensure proper thermal management by providing adequate heat sinking, and avoiding high-power dissipation in close proximity to the device. Also, follow the recommended PCB layout and thermal design guidelines.
• What is the recommended input capacitor value and type?
  Bourns recommends using a 10uF to 22uF X7R or X5R ceramic capacitor with a voltage rating of 16V or higher. The capacitor should be placed as close as possible to the VIN pin and connected to the GND pin.
• How do I handle the device's enable pin (EN) during power-up and power-down sequences?
  The EN pin should be pulled high (to VIN) during normal operation. During power-up, the EN pin should be pulled high after the input voltage (VIN) has reached the minimum operating voltage (VCC). During power-down, the EN pin should be pulled low before the input voltage (VIN) drops below the minimum operating voltage (VCC).
• What is the maximum allowed output current and how do I ensure it's not exceeded?
  The maximum allowed output current is 1.5A. Ensure the output current is not exceeded by calculating the maximum output current required by the load and selecting the appropriate output capacitor value. Also, monitor the output voltage and current during operation to prevent overcurrent conditions.