| 摘要 |
A voltage regulating circuit, such as a voltage regulator or battery charger, limits inrush current by buffering an associated supply input decoupling capacitor through a current path that is selectively configured to have a high impedance for startup charging of the decoupling capacitor at a low current, and a low impedance for normal operations of the circuit. Where the circuit uses multiple supply input connections for operation from two or more supply voltages, it may include buffering for each one of two or more supply input connections. It may further include a crossover switching control circuit that ensures make-before-break switching between supply input connections to avoid supply interruptions to the circuit during switchover.
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