【摘要】 提出了一种具有较高增益和稳定性的片上低压差线性稳压器(LDO),可为高速变化的逻辑和驱动电路提供快速响应的电压。该两级级联输出的LDO基于0.18μm BCD工艺设计，工作在9.5～15.5 V宽电源电压范围内，并且具有较好的相位裕度、较高的响应速度以及较好的线性调整率，能够满足芯片内部多个电源轨的供电需求。采用Cadence仿真并进行了流片试制，仿真和测试结果表明，该LDO主环路在全负载范围内具有较好的相位裕度，输出电压纹波较小。在输入电压为9.5～15.5 V时，两级LDO的输出电压分别稳定在4.53 V和1.80 V,具有较好的线性调整率。LDO用于GaN驱动芯片时，能稳定地为逻辑和驱动等模块提供电源电压。更多还原

【Abstract】 An on-chip low dropout linear regulator(LDO) with high gain and stability was proposed. It could provide fast-response voltage for high speed changing logic and driver circuits. The two-stage cascaded output LDO with a wide supply voltage range from 9.5 V to 15.5 V was designed in a 0.18 μm BCD process, which had a good phase margin, a high response speed and a good linear adjustment rate to meet the power supply requirements of multiple power rails inside the chip. The LDO circuit was simulated with Cadence, and was fabricated. The simulation and test results show that the main loop of LDO has a good phase margin and a low output voltage ripple in the full load range. When the input voltage ranges from 9.5 V to 15.5 V, the output voltages of the two-stage LDO are stable at 4.53 V and 1.80 V, respectively, and the linear regulation is nice. The LDO can provide stable supply voltages for logic, driver and other modules when used in GaN driver chips.更多还原