JSSC 2012第8期Power Management45nm SOIBuck ConverterNeural Network Accelerator

A Switched-Inductor Integrated V oltage Regulator With Nonlinear Feedback and Network-on-Chip Load in 45 nm SOI Noah Sturcken, Student Member , IEEE , Michele Petracca, Steven Warren, Paolo Mantovani

一款45nm SOI技术的四相集成降压转换器，采用非线性反馈PWM控制，实现快速响应和高效率。

1A/mm电流输出，83%效率，0.66转换比

集成降压转换器非线性反馈SOI技术高频开关网络芯片

▸创新点1：非线性增益PWM控制（方法创新）。采用无锁存PWM控制结合非线性增益技术，实现了稳定的小信号动态响应和快速大信号瞬态响应（700 ps），相比传统锁存PWM控制器，输出电容需求降低5倍。

▸创新点2：80MHz高频开关集成空气芯电感（电路创新）。在45nm SOI工艺中集成空气芯电感，实现80MHz高频开关操作，功率密度达1A/mm²，效率83%，转换比0.66，显著提升功率密度和开关频率。

▸创新点3：网络芯片(NoC)作为数字负载（系统创新）。采用NoC模拟真实数字负载，结合可编程电流源（1A/100ps阶跃斜率），为控制方案特性分析提供高动态测试环境，验证瞬态响应能力。

▸创新点4：四相集成降压转换器架构（系统创新）。通过多相并联结构优化电流分配，降低纹波并提升整体效率，同时兼容SOI工艺的寄生参数特性。

Abstract

A four-phase integrated buck converter in 45 nm silicon-on-insulator (SOI) tec hnology is presented. The control ler uses unlatched pulse-width modulation (PWM) with nonlinear gain to provide both stable small-signal dynamics and fast re- sponse ( 700 ps) to large input and outp ut transients. This fast control approach reduces the required output capacitance by 5 in comparison to a conventiona l, latched PWM controller at a similar operating point. The co nverter switches package-in - tegrated air-core inductors at 80 MHz and delivers 1 A/mm at 83% ef ﬁciency and 0.66 conversion r atio. A network-on-chip (NoC) serves as a realistic digital load along with a pr ogrammable current source capable of generating load current steps with slew rate of 1 A/100 ps for characterization of the control scheme.