| Hu Zhengfei (胡正飞),Xue Shaojia.[J].高技术通讯(英文),2014,20(2):208~212 |
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| Design of a fast-transient and high-stabilized GPS low dropout regulator |
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| DOI：10.3772/j.issn.1006-6748.2014.02.015 |
| 中文关键词: |
| 英文关键词: low dropout (LDO), bandgap reference, error amplifier, AC current path, equivalent series resistance (ESR) |
| 基金项目: |
| Author Name | Affiliation | | Hu Zhengfei (胡正飞) | | | Xue Shaojia | |
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| 中文摘要: |
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| 英文摘要: |
| A high stabilized low dropout (LDO) voltage regulator fabricated for GPS radio frequency (RF) chip in SMIC 0.18μm CMOS technology is presented. The LDO mainly consists of bandgap reference, error amplifier, resistive feedback network and AC current path. A fast current path is added to improve the performance of LDO’s transient response. Equivalent series resistance (ESR) compensation and internal Miller compensation are used to constitute the frequency compensation. The measurement results of the transient response of the output voltage show that it can recover within 2μs with less than 120 mV ripple when the load current is changed from 0 to 100mA. The total quiescent current of LDO and bandgap reference(without load) is 260μA. |
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