Attention to Internet Explorer users: ROHM website does not recommend browsing in IE 11. Please use latest browser to ensure the best performance on ROHM website.
If the termination regulator has a VTTS pin the phase margin can be measured using FRA. Insert a 100Ω resistor between VTT and VTTS and measure the gain-phase of VTT relative to VTTS by supplying an AC signal around 10mV across the resistor. Refer to the technical materials for details.