Additional Information: Quick View Data Sheet for the MAX1790 Samples and Literature Order Form Technical Support: Power A USB-powered device is constrained to draw no more than 0.5A from the input supply. The input-supply voltage must be re-regulated to provide +5V ± 5%. Efficiency is paramount in order to maximize the power available from the port. In addition, this application can be implemented with all-ceramic capacitors for lowest profile and high availability. This MAX1790 circuit delivers +5V at 200mA from +4.35V input with > 90% efficiency. 我们期待您的反馈！ 喜欢？不喜欢？有待改善？或为我们提供建议？请与我们联系 — 我们将根据您的意见或建议改善我们的工作。 网页评价或提供建议 自动更新 需要自动接收最新发布的应用笔记吗？请订阅EE-Mail™ (English only)。 更多信息   APP 477: Dec 01, 2000 MAX1790 低噪声、升压型DC-DC转换器 完整的数据资料 (PDF, 296kB) 免费样品   下载，PDF格式 (7kB)  AN477, AN 477, APP477, Appnote477, Appnote 477