电子科技
電子科技
전자과기
IT AGE
2014年
9期
121-123,127
,共4页
升压型DC-DC%瞬态响应%负载跳变%误差放大器
升壓型DC-DC%瞬態響應%負載跳變%誤差放大器
승압형DC-DC%순태향응%부재도변%오차방대기
boost DC-DC converter%transient response%load transient%error amplifier
设计了一种增强升压型DC-DC转换器瞬态响应电路，该电路通过检测负载跳变条件下输出电压的变化，调节误差放大器的跨导和补偿电阻，提高升压DC-DC转换器环路带宽，加快系统的瞬态响应。同时将该电路应用于一款输入电压＜至1.4 V，输出电压2.5～6.5 V的同步升压型DC-DC转换器中，其在0.25μm CMOS 工艺条件下，芯片仿真结果表明，在500 mA～2 A的负载跳变条件下，与传统同步升压DC-DC转换器相比，芯片的响应恢复时间减小了45％，输出电压的下降和过冲值减少了35％。
設計瞭一種增彊升壓型DC-DC轉換器瞬態響應電路，該電路通過檢測負載跳變條件下輸齣電壓的變化，調節誤差放大器的跨導和補償電阻，提高升壓DC-DC轉換器環路帶寬，加快繫統的瞬態響應。同時將該電路應用于一款輸入電壓＜至1.4 V，輸齣電壓2.5～6.5 V的同步升壓型DC-DC轉換器中，其在0.25μm CMOS 工藝條件下，芯片倣真結果錶明，在500 mA～2 A的負載跳變條件下，與傳統同步升壓DC-DC轉換器相比，芯片的響應恢複時間減小瞭45％，輸齣電壓的下降和過遲值減少瞭35％。
설계료일충증강승압형DC-DC전환기순태향응전로，해전로통과검측부재도변조건하수출전압적변화，조절오차방대기적과도화보상전조，제고승압DC-DC전환기배로대관，가쾌계통적순태향응。동시장해전로응용우일관수입전압＜지1.4 V，수출전압2.5～6.5 V적동보승압형DC-DC전환기중，기재0.25μm CMOS 공예조건하，심편방진결과표명，재500 mA～2 A적부재도변조건하，여전통동보승압DC-DC전환기상비，심편적향응회복시간감소료45％，수출전압적하강화과충치감소료35％。
A circuit is designed to improve the transient response of the boost DC-DC converters .The output voltage of the DC-DC converter is sensed to adjust the transconductance and compensation resistors in the error ampli -fier and to improve the loop bandwidth , thus enhancing the system's transient response .The circuit is implemented in a synchronous boost DC-DC converter with input voltage as low as 1.4 V and with output voltage 2.5~6.5 V. Based on 0.25 μm CMOS technology , the chip simulation results demonstrate the settling time of the chip is de-creased by 45%and the overshoot and undershoot voltage is cut down by 35%under 200 mA to 2 A load transient condition compared with the traditional synchronous boost DC-DC converter .
