ZHCSCY3E October 2014 – October 2018 LM5160 , LM5160A
PRODUCTION DATA.
As mentioned earlier in Soft Start, the SS capacitor CSS must always be more than 1 nF in both buck and Fly-Buck converter applications. Apart from determining the start-up time, this capacitor serves as the external compensation of the internal GM error amplifier. A minimum value of 1 nF is necessary to maintain stability. The SS pin must not be left floating.
The VCC pin of the LM5160 must not be biased with an external voltage source. When an improved efficiency requirement warrants an external VCC bias, the LM5160A must be used.