| FIGURE 5 |
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| Fig 5— At light loads, the output inductor current (a) of the standard buck converter is discontinuous. Some synchronous-rectifier controllers emulate diode action by turning off the lower MOSFET when the current reverses. Maintaining conduction of the lower MOSFET—allowing the MOSFET to conduct in the reverse direction—keeps the inductor current continuous (b). |
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