A Fully On-Chip Digitally Assisted LDO Regulator With Improved Regulation and Transient Responses

被引：15

作者：

Li, Han ^{[1
]}

Zhan, Chenchang ^{[1
]}

Zhang, Ning ^{[1
]}

机构：

[1] Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS | 2018年 / 65卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Mixed-mode LDO; output-capacitor-free; load regulation; load transient; adaptive biasing (AB); LOW-DROPOUT REGULATOR;

D O I：

10.1109/TCSI.2018.2851514

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper presents a fully on-chip mixed-mode low-dropout (LDO) regulator with improved regulation and transient responses. With the help of the digital regulation part, the supported maximum load current is significantly improved, while the chip area overhead is very small. A Miller compensation capacitor and a buffer stage are used to achieve stability and improve power MOS gate slew rate. The ultra-fast voltage buffer helps further improve the load transient recovery speed and reduce the chip area due to its wider voltage swing. A proof-of-concept LDO design is fabricated in a standard 0.18-mu m CMOS technology. The maximum load current is 150 mA, the output voltage is 1 V, and the dropout voltage is 0.2 V. The load regulation is 0.17 mV/mA, which is more than 480% improved over the traditional design without digital assistance.

引用

页码：4027 / 4034

页数：8

共 25 条

[1] A transient-enhanced 20μA-Quiescent 200mA-load low-dropout regulator with buffer impedance attenuation [J].

Al-Shyoukh, Mohammad ;

Perez, Raul A. ;

Lee, Hoi .

PROCEEDINGS OF THE IEEE 2006 CUSTOM INTEGRATED CIRCUITS CONFERENCE, 2006, :615-618

[2] Switched-Mode-Control Based Hybrid LDO for Fine-Grain Power Management of Digital Load Circuits [J].

Bin Nasir, Saad ;

Sen, Shreyas ;

Raychowdhury, Arijit .

IEEE JOURNAL OF SOLID-STATE CIRCUITS, 2018, 53 (02) :569-581

[3] High PSR Low Drop-Out Regulator With Feed-Forward Ripple Cancellation Technique [J].

El-Nozahi, Mohamed ;

Amer, Ahmed ;

Torres, Joselyn ;

Entesari, Kamran ;

Sanchez-Sinencio, Edgar .

IEEE JOURNAL OF SOLID-STATE CIRCUITS, 2010, 45 (03) :565-577

[4] Reverse Nested Miller Compensation Using Current Buffers in a Three-Stage LDO [J].

Garimella, Annajirao ;

Rashid, M. Wasequr ;

Furth, Paul M. .

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS, 2010, 57 (04) :250-254

[5] Robust Miller Compensation With Current Amplifiers Applied to LDO Voltage Regulators [J].

Giustolisi, Gianluca ;

Palumbo, Gaetano ;

Spitale, Ester .

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, 2012, 59 (09) :1880-1893

[6] A 6-μW Chip-Area-Efficient Output-Capacitorless LDO in 90-nm CMOS Technology [J].

Guo, Jianping ;

Leung, Ka Nang .

IEEE JOURNAL OF SOLID-STATE CIRCUITS, 2010, 45 (09) :1896-1905

[7]

Han X, 2016, IEEE INT SYMP CIRC S, P2699, DOI 10.1109/ISCAS.2016.7539150

[8] Area-efficient linear regulator with ultra-fast load regulation [J].

Hazucha, P ;

Karnik, T ;

Bloechel, BA ;

Parsons, C ;

Finan, D ;

Borkar, S .

IEEE JOURNAL OF SOLID-STATE CIRCUITS, 2005, 40 (04) :933-940

[9]

Heng S, 2009, IEEE INT SYMP CIRC S, P2529, DOI 10.1109/ISCAS.2009.5118316

[10]

Huang M, 2017, ISSCC DIG TECH PAP I, P342, DOI 10.1109/ISSCC.2017.7870401

← 1 2 3 →