| 摘要 |
A voltage converter circuit includes a first transistor (M1) having a drain connected to receive an unregulated input voltage (Vin), a gate connected to receive a feedback control signal (4), and a source connected to a first conductor (5). An inductor (6) having a first terminal coupled to the first conductor (5) and a second terminal use connected to produce a regulated output voltage (Vout) on an output conductor (7). A feedback control circuit (190) coupled between the gate of the first transistor (M1) and the output conductor for regulating switching of the first transistor in response to the regulated output voltage (Vout). A synchronous rectifier circuit includes a comparator (120) having an inverting input coupled to the first conductor (5) and a non-inverting input coupled to the reference voltage conductor (3), a logic circuit (140) having an input coupled to an output (13) of the comparator, a first output (15), and a second output (9), a second transistor (M2-1) having a gate coupled to the first output (15), a source coupled to the reference voltage conductor (3), and a drain coupled to the first conductor (5), and a third transistor (M2-2) having a gate coupled to the second output (9), a source coupled to the reference voltage conductor (3), and a drain coupled to the first conductor (5).
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