V-Input-Voltage 0.6V-Output-Voltage 30ppm/°C Low-Dropout Regulator with Embedded Voltage Reference for Low-Power Biomedical Systems

📋 论文概要

本文提出一种用于低功耗生物医学系统的低压差稳压器，通过将电压参考电路嵌入到误差放大器中，解决了传统LDO中电压头空间限制的问题，实现了低输入电压操作。该LDO在0.6V输出电压下达到30ppm/°C的温度系数，最大驱动电流为10mA。

📄 原文摘要

6V to biomedical systems requires a low dropout (LDO) regulator with a maximum driving current capability of 10mA. One sub-1V voltage reference circuit is commonly used in the conventional LDO design to generate the reference voltage VREF with a low temperature coefficient (TC), as shown in Fig. 17.10.1. VREF is sent to the inverting terminal of the error amplifier (EA) to regulate the output voltage VOUT. The critical path of the voltage headroom exists between VREF and VIN through the inverting terminal and the tail current of the EA. That is, VIN>VSG+VOV+VREF ≈|Vtp|+2VOV+VREF, where VIN is the input supply voltage, Vtp is the threshold voltage of the p-type MOSFET and VOV is the overdrive voltage. If the minimum value of VIN is reduced to 0.65V, the derived VREF should be smaller than 50mV when |Vtp| is 0.4V and |VOV| is 0.1V.

👥 作者与机构

Wei-Chung Chen, Yi-Ping Su, Yu-Huei Lee,

Chin-Long Wey, Ke-Horng Chen National Chiao Tung University, Hsinchu, Taiwan Supplying a regulated 0