| 摘要 |
A mode transitioning system (10) for a charge pump (12), which may optionally be embodied in an integrated circuit (28). A number of switches (30a-i) are operated based on an input detection sub-circuit (32) and an output detection sub-circuit (34) to controllably connect a number of flying capacitors (24, 26) in a variety of manners producing alternate input voltage to output voltage step ratios. One example embodiment of the mode transitioning system (10) is presented which proceeds from an idle state (52a), through start-up and fault testing states (52b-c), and then selects among alternate step-down rations of 1:1, 2:3, and 1:2 based on suitability and efficiency for respective operating states (52d-f).
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