This letter presents a high-frequency boost converter using an accurate feedforward-path current sensor for the fast-load transient response. To operate with the switching frequency of up to 25 MHz, the proposed current sensor senses the inductor current with a fast-sensing response time of about 4.5 ns. It also provides more accurate sensing gain than previous current sensors. In addition, the adaptive on-time control method is used for the proposed converter to further enhance the transient responses. The converter has been fabricated using a 0.18-μm CMOS process with a total chip area of 1.3 × 1.12 mm. It achieves a fast-load transient of only 1 μs at a 400-mA load step, and peak efficiency of 91.5 and 88.2% at switching frequencies of 15 and 25 MHz, respectively.

中文翻译：

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使用精确前馈路径电流传感器的 1525MHz 和 1s/0.4A 负载响应 AOT 升压转换器


这封信介绍了一种高频升压转换器，使用精确的前馈路径电流传感器来实现快速负载瞬态响应。为了在高达 25 MHz 的开关频率下工作，所提出的电流传感器以约 4.5 ns 的快速感测响应时间感测电感器电流。它还提供比以前的电流传感器更准确的传感增益。此外，所提出的转换器采用自适应导通时间控制方法，以进一步增强瞬态响应。该转换器采用 0.18μm CMOS 工艺制造，总芯片面积为 1.3 × 1.12 mm。它在 400mA 负载阶跃下实现了仅 1μs 的快速负载瞬态，在 15MHz 和 25MHz 开关频率下分别实现了 91.5% 和 88.2% 的峰值效率。