All-directional Electrostatic-discharge Protection Circuit with High Area-efficiency

Do, Kyoung-Il; Lee, Byung-Seok; Jin, Seung-hoo; Koo, Yong-Seo

doi:10.5573/jsts.2021.21.4.270

Cited by 1 publication

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“…This prevents the latch-up problem caused by the low holding voltage in conventional SCR and provides stable ESD protection. Therefore, when the proposed ESD protection circuit is built into the LDO regulator, the ESD current can be safely discharged, ensuring stable operation of the LDO regulator against ESD events, as well as improved performance and lifespan [20,21,22,23,24,25,26]. As shown in Figure 2, the proposed LDO regulator consists of a dynamic current driving structure and an SCRbased ESD protection circuit.…”

Section: Introductionmentioning

confidence: 99%

High-reliability LDO regulator with built-in SCR-based ESD protection circuit designed for effective peak voltage reduction

Kwon¹,

Jeong²,

Lee³

et al. 2023

IEICE Electron. Express

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The LDO regulator and ESD protection circuit are essential circuit configurations for stable voltage provision and high reliability at the IC level. This paper proposes an LDO regulator with a built-in silicon controlled rectifier (SCR) based electrostatic discharge (ESD) protection circuit that can provide optimized voltage for low voltage applications. The proposed LDO regulator can skillfully control the output voltage by forming additional current discharge and supply paths through the dynamic current driving structure. In addition, in this paper, the high reliability of the IC was verified by intentionally exposing it to ESD situations depending on the presence or absence of the ESD protection circuit of the LDO regulator. It was confirmed that the proposed LDO regulator designed in a 0.13μm BCD process was kept an undershoot voltage of 23mV and an overshoot voltage of 21mV for a load current of 300mA. As a result, the proposed LDO regulator with built-in ESD protection circuit was secured high reliability of LDO regulator from ESD situation as well as low peak voltage due to load current.

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