An Output-Capacitorless Low-Dropout Regulator with Slew-Rate Enhancement
A novel output-capacitorless low-dropout regulator (OCL-LDO) with an embedded slew-rate-enhancement (SRE) circuit is presented in this paper. The SRE circuit adopts a transient current-boost strategy to improve the slew rate at the gate of the power transistor when a large voltage spike at the outpu...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-09-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/13/10/1594 |
| _version_ | 1797471216713334784 |
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| author | Shenglan Ni Zhizhi Chen Chenkai Hu Houpeng Chen Qian Wang Xi Li Sannian Song Zhitang Song |
| author_facet | Shenglan Ni Zhizhi Chen Chenkai Hu Houpeng Chen Qian Wang Xi Li Sannian Song Zhitang Song |
| author_sort | Shenglan Ni |
| collection | DOAJ |
| description | A novel output-capacitorless low-dropout regulator (OCL-LDO) with an embedded slew-rate-enhancement (SRE) circuit is presented in this paper. The SRE circuit adopts a transient current-boost strategy to improve the slew rate at the gate of the power transistor when a large voltage spike at the output is detected. In addition, a feed-forward transconductance cell is introduced to form a push–pull output structure with the power transistor. The simulation results show that the maximum transient output voltage variation is <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>23.5</mn><mo> </mo><mi>mV</mi></mrow></semantics></math></inline-formula> when the load current <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>I</mi><mrow><mi>L</mi><mi>O</mi><mi>A</mi><mi>D</mi></mrow></msub></mrow></semantics></math></inline-formula> is stepped from <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mn>0</mn></semantics></math></inline-formula> to <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>100</mn><mo> </mo><mi>mA</mi></mrow></semantics></math></inline-formula> in <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>100</mn><mo> </mo><mi>ns</mi></mrow></semantics></math></inline-formula> with a load capacitance of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>100</mn><mo> </mo><mi>pF</mi></mrow></semantics></math></inline-formula>, and the settling time is <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>1.2</mn><mo> </mo><mrow><mi mathvariant="sans-serif">μ</mi><mi mathvariant="normal">s</mi></mrow></mrow></semantics></math></inline-formula>. The proposed OCL-LDO consumes a quiescent current of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>30</mn><mo> </mo><mrow><mi mathvariant="sans-serif">μ</mi><mi mathvariant="normal">A</mi></mrow></mrow></semantics></math></inline-formula> and has a dropout voltage of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>200</mn><mo> </mo><mi>mV</mi></mrow></semantics></math></inline-formula> for the maximum output current of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>100</mn><mo> </mo><mi>mA</mi></mrow></semantics></math></inline-formula>. |
| first_indexed | 2024-03-09T19:46:57Z |
| format | Article |
| id | doaj.art-0f8d6cc8536347c082a7b22327d15e7c |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-09T19:46:57Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-0f8d6cc8536347c082a7b22327d15e7c2023-11-24T01:21:12ZengMDPI AGMicromachines2072-666X2022-09-011310159410.3390/mi13101594An Output-Capacitorless Low-Dropout Regulator with Slew-Rate EnhancementShenglan Ni0Zhizhi Chen1Chenkai Hu2Houpeng Chen3Qian Wang4Xi Li5Sannian Song6Zhitang Song7State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, ChinaState Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, ChinaState Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, ChinaState Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, ChinaState Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, ChinaState Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, ChinaState Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, ChinaState Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, ChinaA novel output-capacitorless low-dropout regulator (OCL-LDO) with an embedded slew-rate-enhancement (SRE) circuit is presented in this paper. The SRE circuit adopts a transient current-boost strategy to improve the slew rate at the gate of the power transistor when a large voltage spike at the output is detected. In addition, a feed-forward transconductance cell is introduced to form a push–pull output structure with the power transistor. The simulation results show that the maximum transient output voltage variation is <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>23.5</mn><mo> </mo><mi>mV</mi></mrow></semantics></math></inline-formula> when the load current <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>I</mi><mrow><mi>L</mi><mi>O</mi><mi>A</mi><mi>D</mi></mrow></msub></mrow></semantics></math></inline-formula> is stepped from <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mn>0</mn></semantics></math></inline-formula> to <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>100</mn><mo> </mo><mi>mA</mi></mrow></semantics></math></inline-formula> in <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>100</mn><mo> </mo><mi>ns</mi></mrow></semantics></math></inline-formula> with a load capacitance of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>100</mn><mo> </mo><mi>pF</mi></mrow></semantics></math></inline-formula>, and the settling time is <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>1.2</mn><mo> </mo><mrow><mi mathvariant="sans-serif">μ</mi><mi mathvariant="normal">s</mi></mrow></mrow></semantics></math></inline-formula>. The proposed OCL-LDO consumes a quiescent current of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>30</mn><mo> </mo><mrow><mi mathvariant="sans-serif">μ</mi><mi mathvariant="normal">A</mi></mrow></mrow></semantics></math></inline-formula> and has a dropout voltage of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>200</mn><mo> </mo><mi>mV</mi></mrow></semantics></math></inline-formula> for the maximum output current of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>100</mn><mo> </mo><mi>mA</mi></mrow></semantics></math></inline-formula>.https://www.mdpi.com/2072-666X/13/10/1594low-dropout regulator (LDO)output-capacitorlesspush–pullslew-rate enhancement |
| spellingShingle | Shenglan Ni Zhizhi Chen Chenkai Hu Houpeng Chen Qian Wang Xi Li Sannian Song Zhitang Song An Output-Capacitorless Low-Dropout Regulator with Slew-Rate Enhancement Micromachines low-dropout regulator (LDO) output-capacitorless push–pull slew-rate enhancement |
| title | An Output-Capacitorless Low-Dropout Regulator with Slew-Rate Enhancement |
| title_full | An Output-Capacitorless Low-Dropout Regulator with Slew-Rate Enhancement |
| title_fullStr | An Output-Capacitorless Low-Dropout Regulator with Slew-Rate Enhancement |
| title_full_unstemmed | An Output-Capacitorless Low-Dropout Regulator with Slew-Rate Enhancement |
| title_short | An Output-Capacitorless Low-Dropout Regulator with Slew-Rate Enhancement |
| title_sort | output capacitorless low dropout regulator with slew rate enhancement |
| topic | low-dropout regulator (LDO) output-capacitorless push–pull slew-rate enhancement |
| url | https://www.mdpi.com/2072-666X/13/10/1594 |
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