−12.7 −13.4 V lo1 250 mA Vi=−240V to −420V lo2 130 mA Vi=−420V to −600V 0.07 0.25 V Vi=−240V to −600V lo=130mA 150 100 Vi=−420V to −600V 50 0-20 -10 0 10 20 30 40 50 60 70 80 90 Ambient Temperature Ta( C) Load regulation Output ripple voltage Conversion efficiency 0.05 0.20 V lo=0 to 250mA 0.08.