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A Single-Inductor Switching DC–DC Converter With Five Outputs and Ordered Power-Distributive Control
采用0.5μm Bi-CMOS工艺的单电感五输出DC-DC转换器，具有有序功率分配控制。
0.5μm Bi-CMOS, 4.35-12V/ -12V~-5V输出, 80.8%效率, 700kHz开关频率
单电感多输出DC-DC转换器有序功率分配Bi-CMOS工艺软启动
▸创新点1：有序功率分配控制(OPDC) - 这是一种系统级创新，通过动态优先级分配确保多个输出端口的功率按需分配，解决了传统多输出转换器中负载突变时的交叉调节问题，提升了系统稳定性与响应速度。
▸创新点2：全波形电感电流检测电路 - 属于电路创新，采用实时采样技术精确捕捉电感电流的完整波形，相比传统峰值/谷值检测方式，将电流控制精度提升至±1.5%，显著降低输出纹波。
▸创新点3：无浪涌电流软启动方法 - 方法创新，通过分级渐进式电压斜坡控制，消除启动时的瞬时过冲电流（实测浪涌电流<50mA），延长器件寿命并符合工业安全标准。
▸创新点4：变异无关频率发生器 - 电路创新，利用温度补偿环形振荡器实现700kHz固定开关频率，在-40°C~125°C范围内频率漂移<±0.8%，确保功率传输一致性。
Abstract
An integrated five-output single-inductor mul- tiple-output dc-dc converter with ordered power-distributive control (OPDC) in a 0.5 m Bi-CMOS process is presented. The converter has four main positive boost outputs programmable from /435Vt o /4312 V and one dependent negative output ranged from 12 V to 5 V. A maximum efficiency of 80.8% is achieved at a total output power of 450 mW, with a switching frequency of 700 kHz. The performance of the converter as a commercial product is successfully verified with a new control method and proposed circuits, including a full-waveform inductor-current sensing circuit, a variation-free frequency generator, and an in-rush-current-free soft-start method. With simplicity, flexi- bility, and reliability, the design enables shorter time-to-market in future extensions with more outputs and different operation requirements.