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.
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.
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.
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.
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.
LT1498CS8 datasheet
by Linear Technology
