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http://dx.doi.org/10.7471/ikeee.2015.19.3.304

Implementation of a High Efficiency SCALDO Regulator Using MOSFET  

Kwon, O-Soon (LIG Nex1 Co., Ltd.)
Son, Joon-Bae (LIG Nex1 Co., Ltd.)
Kim, Tea-Rim (LIG Nex1 Co., Ltd.)
Song, Jong-Gyu (LIG Nex1 Co., Ltd.)
Publication Information
Journal of IKEEE / v.19, no.3, 2015 , pp. 304-310 More about this Journal
Abstract
A SCALDO(Supercapacitor Assisted LDO) regulator is a new regulator having advantages of a SMPS(Switch Mode Power Supply) which has a good efficiency and a LDO(Low Drop-out) regulator which has stable output characteristics and good EMI(Electro Magnetic Interference) characteristics. However, a conventional SCALDO regulator needs a lot of power consumption to control its switches and it drops an efficiency of the circuit. In this paper, to reduce switching power consumption and improve an efficiency of the circuit, a new SCALDO regulator adopting MOSFETs as its switching parts is proposed and it is found out that the proposed SCALDO regulator has the maximum 9.5% higher efficiency than the conventional SCALDO regulator. We also try to simplify production process of the circuit by changing switching control method of the circuit from MCU(Micro-controller unit) based firmware control to hardware control using a comparator and a T-F/F(Flip Flop).
Keywords
SCALDO; High Efficiency; EMI Free; Supercapacitor; MOSFET; LDO Regulator;
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