论文信息 - An output-capacitorless FVF-based low-dropout regulator for power management applications

An output-capacitorless FVF-based low-dropout regulator for power management applications

This paper presents an output-capacitorless low-dropout (LDO) regulator based on improved flipped voltage follower power stage for use in power management circuits. A new error amplifier (EA) structure, named as gain-bandwidth enhanced EA, is embedded in the LDO regulator. The LDO regulator is designed for the input and output voltages of 1.2 V and 1 V, respectively. Fast transients, low overshoot and undershoot, and low quiescent current of 6 μΑ are achieved for the proposed circuit. The LDO regulator is designed for maximum load current of 50 mA, achieving the current and power efficiencies of 99.99% and 83.3%, respectively. Additionally, up to 131 pF capacitance is used in the proposed LDO structure. The proposed circuit is designed and verified in HSPICE in TSMC 0.18 μm mixed signal CMOS process.

Herminio Martínez | Alireza Saberkari | Vahideh Shirmohammadli | Eduard Alarcón-Cot

[1] Grzegorz Blakiewicz,et al. Output-capacitorless low-dropout regulator using a cascoded flipped voltage follower , 2011, IET Circuits Devices Syst..

[2] T. Karnik,et al. Area-efficient linear regulator with ultra-fast load regulation , 2005, IEEE Journal of Solid-State Circuits.

[3] Herminio Martínez,et al. High slew rate current mode transconductance error amplifier for low quiescent current output-capacitorless CMOS LDO regulator , 2014, Integr..

[4] Ka Nang Leung,et al. Development of Single-Transistor-Control LDO Based on Flipped Voltage Follower for SoC , 2008, IEEE Transactions on Circuits and Systems I: Regular Papers.

[5] Edgar Sánchez-Sinencio,et al. Full On-Chip CMOS Low-Dropout Voltage Regulator , 2007, IEEE Transactions on Circuits and Systems I: Regular Papers.

[6] Herminio Martínez,et al. Output-capacitorless segmented low-dropout voltage regulator with controlled pass transistors , 2016, Int. J. Circuit Theory Appl..

[7] Suming Lai,et al. A fully on-chip area-efficient CMOS low-dropout regulator with fast load regulation , 2012 .

[8] K. Leung,et al. A capacitor-free CMOS low-dropout regulator with damping-factor-control frequency compensation , 2003, IEEE J. Solid State Circuits.