LM76CHM-5 datasheet by Texas Instruments

LM76CHM-5 Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal thermal performance?
  Texas Instruments recommends a 2-layer or 4-layer PCB with a solid ground plane on the bottom layer and a thermal relief pattern on the top layer to ensure good thermal conductivity. A minimum of 2 oz copper thickness is recommended.
• How do I handle the thermal shutdown feature in my design?
  The thermal shutdown feature is enabled by default. When the junction temperature exceeds 150°C, the device will shut down. To handle this, ensure your design can tolerate the shutdown and restart when the temperature drops below 140°C. You can also disable the thermal shutdown feature by connecting the TSD pin to VCC.
• What is the recommended input capacitor value and type for the LM76CHM-5?
  A 10 μF to 22 μF X5R or X7R ceramic capacitor is recommended for the input capacitor. This value provides a good balance between noise filtering and stability.
• Can I use the LM76CHM-5 in a high-temperature environment?
  While the LM76CHM-5 is rated for operation up to 125°C, it's essential to consider the derating of the output current and power dissipation at higher temperatures. Consult the datasheet for derating curves and ensure your design can accommodate the reduced performance.
• How do I ensure the output voltage is accurate and stable?
  To ensure output voltage accuracy and stability, use a high-quality output capacitor (e.g., 10 μF to 22 μF X5R or X7R ceramic) and keep the output capacitor close to the device. Additionally, minimize the distance between the input and output capacitors to reduce noise and improve stability.