SDR03EZPJ103 - ROHM Semiconductor

SDR03EZPJ103 Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance of the SDR03EZPJ103?
  ROHM recommends a 4-layer PCB with a solid ground plane and a separate power plane for the voltage regulator. Keep the input and output capacitors close to the IC, and use a wide trace for the output capacitor to minimize ESL.
• How do I ensure stability and prevent oscillation in the SDR03EZPJ103?
  To ensure stability, use a minimum output capacitance of 10uF, and ensure the output capacitor's ESR is less than 1 ohm. Also, add a 1uF ceramic capacitor between the VIN and GND pins to filter out high-frequency noise.
• What is the maximum input voltage that the SDR03EZPJ103 can handle?
  Although the datasheet specifies a maximum input voltage of 36V, ROHM recommends limiting the input voltage to 30V to ensure reliable operation and prevent damage to the internal voltage regulator.
• Can I use the SDR03EZPJ103 in a high-temperature environment?
  Yes, the SDR03EZPJ103 is rated for operation up to 125°C. However, the output current may decrease at higher temperatures, and the device's reliability may be affected. Consult ROHM's application notes for thermal design considerations.
• How do I calculate the output voltage of the SDR03EZPJ103?
  The output voltage is determined by the resistor divider network between the VOUT and ADJ pins. Use the formula: VOUT = 1.25V x (1 + R1/R2), where R1 and R2 are the resistors in the divider network.