RH119W datasheet by Linear Technology

RH119W Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for RH119W to minimize thermal resistance?
  Linear Technology recommends a 2-layer PCB with a thermal pad on the bottom layer connected to a large copper area to dissipate heat. The datasheet provides a recommended PCB layout and thermal pad design.
• How do I ensure the RH119W is stable and does not oscillate?
  To ensure stability, make sure to follow the recommended compensation network and component values, and ensure that the output capacitor has a low ESR. Additionally, the datasheet provides a stability analysis and design guidelines to help prevent oscillation.
• What is the maximum input voltage that can be applied to RH119W?
  The RH119W has an absolute maximum input voltage rating of 42V. However, the recommended operating input voltage range is 7V to 36V. Applying voltages above 36V may reduce the device's reliability and lifespan.
• Can I use RH119W in a high-temperature environment?
  The RH119W has a maximum operating junction temperature of 150°C. While it can operate in high-temperature environments, the device's performance and reliability may degrade above 125°C. It's essential to ensure proper thermal management and derate the device's power dissipation accordingly.
• How do I protect RH119W from overcurrent and short-circuit conditions?
  The RH119W has built-in overcurrent protection, but it's still essential to add external protection components such as fuses or current-limiting resistors to prevent damage from excessive current. Additionally, ensure that the output capacitor is rated for the maximum output current.