电子元件与材料Issue(11)：81-84,4.DOI:10.14106/j.cnki.1001-2028.2015.11.020
一种适用于BUCK型DC-DC芯片振荡器电路设计
Design of an oscillator circuit for BUCK type DC-DC chip
摘要
Abstract
Based on 0.5μm UMC process, a high performance oscillator was designed. In the design of the circuit by adding the delay circuit could effectively change the duty cycle, also a divider circuit was joined to let the frequency of the output have more diversification, to meet the needs of different frequencies. Using Cadence for circuit design and Hspice software for circuit simulation, the oscillator was simulated. The results show that under the environment of typical applications in the chip system, the oscillator gets the internal synchronous oscillation frequency of 1.1 MHz; when the temperature at –40 – +125℃, the output frequency variation with temperature is only 4.5%; with the power supply voltage changes in 3.0–5.5 V, the change rate of the output frequency is 3.6%. The good performance of the oscillator has been successfully applied in a DC/DC step-down power-management chip.关键词
电源管理芯片/振荡器/占空比/延迟电路/分频电路/内同步Key words
power management chip/oscillator/duty cycle/delay circuit/divider circuit/internal synchronization分类
信息技术与安全科学引用本文复制引用
范建功,冯全源..一种适用于BUCK型DC-DC芯片振荡器电路设计[J].电子元件与材料,2015,(11):81-84,4.基金项目
国家自然科学基金项目资助（No.61271090）；四川省科技支撑计划项目资助 （）
