Additional Information: Quick View Data Sheet for the MAX1692 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. Efficiency is paramount in order to maximize the available power from the port, so a synchronous buck regulator with internal switches is the best choice. In addition, this application can be implemented with all-ceramic capacitors for lowest profile and high availability. This MAX1692 circuit delivers +3.18V at 320mA from +5.25V input with 90.7% efficiency. Figure 1. 相关型号   APP 479: Dec 01, 2000 MAX1692 低噪声、5.5V输入、PWM降压型稳压器 完整的数据资料 (PDF, 160kB) 免费样品 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)。 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   下载，PDF格式 (19kB)  AN479, AN 479, APP479, Appnote479, Appnote 479