With the recent development of IoT technology, electronic products used for mobile use are increasing explosively. In addition, devices that operate only in special situations among IoT devices spend most of their time in power saving mode. Since Most...
With the recent development of IoT technology, electronic products used for mobile use are increasing explosively. In addition, devices that operate only in special situations among IoT devices spend most of their time in power saving mode. Since Most of these products operate at the DC voltage supplied to a battery, and as the power voltage changes as the battery is used, the voltage generated from the battery is converted to a constant voltage, and a Power Management Integrated Circuit (PMIC) having high efficiency and low power has been actively researched.
In this paper, we discuss the design of ultra-low power buck converter and LDO regulator with low quiescent current. A buck converter was manufactured using a 0.18 μm High Voltage BCDMOS process, and the input voltage is 1.8 Vand the power voltage is 1.2 V. The designed part is 350μm × 345μm, and the maximum load current is 2.5 mA. In addition, the Quiescent current of 150 nA is achieved through a comparator with a BGR with a consumption current of 76 nA and a comparator with a consumption current of 65 nA. The ultra-low power Capacitorless LDO consists of Error Amp, CMFB, Pass Transistor, and inverter-based dynamic unit, and is manufactured using the 28 nm CMOS process. The input voltage is 1 V and the output voltage is 0.8 V. The designed area is 100 μm×120 μm, and the maximum load current is 100 mA. In addition, the Quiescent current of 43 nA is achieved through CMFB with 27 nA consumption current and Error Amp with 16 nA consumption current and inverter-based dynamic unit.