L272 datasheet by STMicroelectronics

L272 Frequently Asked Questions (FAQs)

• What is the maximum output current of L272?
  The maximum output current of L272 is 3A per channel, but it can be limited by the thermal dissipation of the package and the PCB design.
• How do I ensure stability of the L272 voltage regulator?
  To ensure stability, a minimum output capacitance of 10uF with an ESR (Equivalent Series Resistance) of less than 1 ohm is recommended. Additionally, the input capacitor should be at least 1uF with an ESR of less than 5 ohms.
• Can I use L272 in a high-temperature environment?
  Yes, L272 can operate in a temperature range of -40°C to 125°C, but the maximum junction temperature should not exceed 150°C. Thermal derating is required for high-temperature applications.
• How do I protect the L272 from input voltage surges?
  A voltage clamp or a transient voltage suppressor (TVS) can be used to protect the L272 from input voltage surges. The TVS should be selected based on the maximum input voltage and the required clamping voltage.
• Can I use L272 in a switching regulator application?
  No, L272 is a linear voltage regulator and not suitable for switching regulator applications. It's designed for low-dropout, low-noise, and high-PSRR applications.