LT1498CS8 datasheet by Linear Technology

LT1498CS8 Frequently Asked Questions (FAQs)

• What is the maximum power dissipation of the LT1498CS8?
  The maximum power dissipation of the LT1498CS8 is dependent on the package and thermal environment. For the SO-8 package, the maximum power dissipation is approximately 1.4W at 25°C ambient temperature, with a thermal resistance (θJA) of 85°C/W.
• How do I layout the PCB to minimize noise and ensure optimal performance?
  To minimize noise and ensure optimal performance, it is recommended to follow good PCB layout practices, such as separating analog and digital grounds, using a solid ground plane, and keeping sensitive analog signals away from noisy digital signals. Additionally, the LT1498CS8 should be placed close to the input bypass capacitors and the output filter components.
• What is the recommended input and output capacitance for the LT1498CS8?
  The recommended input capacitance for the LT1498CS8 is 1-10uF, with a low ESR (Equivalent Series Resistance) to ensure stability and minimize noise. The recommended output capacitance is 10-100uF, with a low ESR to ensure stability and minimize output ripple.
• How do I protect the LT1498CS8 from overvoltage and overcurrent conditions?
  To protect the LT1498CS8 from overvoltage and overcurrent conditions, it is recommended to use a voltage clamp or a transient voltage suppressor (TVS) at the input, and a current limit resistor or a fuse at the output. Additionally, the LT1498CS8 has built-in overcurrent protection, which will limit the output current to approximately 1.5A.
• What is the typical startup time of the LT1498CS8?
  The typical startup time of the LT1498CS8 is approximately 100-200ms, depending on the input voltage and output load. This is the time it takes for the regulator to reach its nominal output voltage after power-on.