I got the below/attached question:
Please find the new card that we recently did.We have two such LM5010 switcher on each board.
When we supply an external 8v to Vcc pin as the datasheet recommends (to reduce the internal power generation), the regulators are working fine except the current then consume from the 8v regulator ~70mA.
According to Figure 4 on the datasheet , the current consumption from the Vcc should be 4.1mA from each component (so total should be ~8.2mA).
The regulator that I placed U4, is for 50mA (that theoretically should be enough).
When I remove the 8v regulator – U6, both LM5010 regulators are not working and getting hot (also the coils L2 & L3 are getting hot).
The configuration without the external 8v regulator is the recommended at the Datasheet & at their evaluation board.
The components that I chose were exactly taken from the WEBENCH simulator.
The layout seems to be fine.
Please ignore the enable mechanism (U3) – there is a mistake with the logic, we enable it manuallyCan you help me here?
7103.objet1 POWER _ Voltage Regulators.pdf6545.objet2 Vh PS SUPPORT _ Vh_S1.pdf4718.objet3 Vh PS MODEL _ Vh M1.pdf2548.objet4 Satriani.zip6237.objet5 snva101.pdf
