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ZXRD1050PQ16 Datasheet(PDF) 22 Page - Diodes Incorporated |
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ZXRD1050PQ16 Datasheet(HTML) 22 Page - Diodes Incorporated |
22 / 28 page ![]() Line regulation Variation in input voltage for both these conditions (0.5A and 4A output) shows the excellent line regulation the ZXRD. Fig.6 shows that with 0.5A and 4A output currents, applying an increase in input voltage from 5V to 10V , results in only small changes in output regulation. Fig.6a Line Regulation 0.5A load Fig.6b Line Regulation 4A load Transient Response Transient response to changes in load is becoming an increasingly critical feature of many converter circuits. Many high speed processors make very large step changes in their load requirements, at the same time as having more stringent specifications in terms of overshoot and undershoot. Fig.7 demonstrates the excellent load transient performance of the ZXRD series. A step change using an electronic load from 1A to 3A is shown with corresponding output transient performance. Fig.7 Output Transient Response Non-synchronous Applications One of the key features of the ZXRD series, when combined with the SimpleSync TM technique, is the flexibility in allowing engineers to choose either a synchronous or non-synchronous architecture. Making the design non-synchronous by removing MOSFET N2 (the synchronous device), replacing the ZHCS1000 with a high current diode (50WQ04FN) and using a 2 terminal inductor, such as the Sumida CDRH127-150MC, decreases cost slightly at the expense of a few efficiency points. Fig.8 shows the effect on the efficiency of the 5 to 3.3V 4A application when the design is made non-synchronous. 22 ISSUE 4 - OCTOBER 2000 ZXRD1000 SERIES |
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