ZHCSH22C January 2009 – November 2017 LM3241
PRODUCTION DATA.
Two main considerations must be considered when choosing an inductor: the inductor should not saturate, and the inductor current ripple should be small enough to achieve the desired output voltage ripple. Different manufacturers follow different saturation current rating specifications, so attention must be given to details. Saturation current ratings are typically specified at 25°C so ratings over the ambient temperature of application should be requested from manufacturer.
The minimum value of inductance to ensure good performance is 0.3 µH at bias current (ILIM, typical) over the ambient temperature range. Shielded inductors radiate less noise and should be preferred. Two methods are avaialble to choose the inductor saturation current rating.