现代电子技术
現代電子技術
현대전자기술
MODERN ELECTRONICS TECHNIQUE
2013年
13期
150-153
,共4页
彭晓宏%朱治鼎%侯立刚%汪金辉%吴武臣
彭曉宏%硃治鼎%侯立剛%汪金輝%吳武臣
팽효굉%주치정%후립강%왕금휘%오무신
线性稳压器%大电流%低功耗%跨导放大器%Bipolar
線性穩壓器%大電流%低功耗%跨導放大器%Bipolar
선성은압기%대전류%저공모%과도방대기%Bipolar
linear voltage regulator%high-current%low power consumption%transconductance amplifier%Bipolar
以设计输出电流为700 mA,静态电流为50μA,芯片面积为1.5 mm×2.0 mm的LDO线性稳压器为目标,提出的LDO电路利用基准电路的输出直接作为芯片的输出,用基准电路所固有的跨导放大器对输出进行检测并反馈至单级放大器,放大后输出至功率管的基极,控制功率管输出额定的电压和电流。无需冗余的误差放大器,使得环路补偿极为简单,不存在传统LDO的补偿难题。在电路上把传统LDO电路所需各个模块的功能糅合到了一个较为简单的电路中,大大减小了芯片面积,并且减小了静态电流。对电路进行了仿真分析并采用2μm 36 V Bipolar工艺生产实现,流片后的测试结果表明该芯片实现了大电流,微功耗,小体积的特性。
以設計輸齣電流為700 mA,靜態電流為50μA,芯片麵積為1.5 mm×2.0 mm的LDO線性穩壓器為目標,提齣的LDO電路利用基準電路的輸齣直接作為芯片的輸齣,用基準電路所固有的跨導放大器對輸齣進行檢測併反饋至單級放大器,放大後輸齣至功率管的基極,控製功率管輸齣額定的電壓和電流。無需冗餘的誤差放大器,使得環路補償極為簡單,不存在傳統LDO的補償難題。在電路上把傳統LDO電路所需各箇模塊的功能糅閤到瞭一箇較為簡單的電路中,大大減小瞭芯片麵積,併且減小瞭靜態電流。對電路進行瞭倣真分析併採用2μm 36 V Bipolar工藝生產實現,流片後的測試結果錶明該芯片實現瞭大電流,微功耗,小體積的特性。
이설계수출전류위700 mA,정태전류위50μA,심편면적위1.5 mm×2.0 mm적LDO선성은압기위목표,제출적LDO전로이용기준전로적수출직접작위심편적수출,용기준전로소고유적과도방대기대수출진행검측병반궤지단급방대기,방대후수출지공솔관적기겁,공제공솔관수출액정적전압화전류。무수용여적오차방대기,사득배로보상겁위간단,불존재전통LDO적보상난제。재전로상파전통LDO전로소수각개모괴적공능유합도료일개교위간단적전로중,대대감소료심편면적,병차감소료정태전류。대전로진행료방진분석병채용2μm 36 V Bipolar공예생산실현,류편후적측시결과표명해심편실현료대전류,미공모,소체적적특성。
A low?dropout regulator(LDO)with an output current of 700 mA,quiescent current of 50 μA and chip area of 1.5 mm×2.0 mm is proposed. The LDO circuit takes reference circuit output as its chip output. The inherent transconductance amplifier of reference circuit is used to detect the output and feedback to stage amplifier,the signal is output to the base of pow?er transistor after amplified,which could control the power valve output rated voltage and current. The error amplifier without re?dundancy makes the loop?compensation extremely simple,excludes the compensation problems in traditional LDO circuit. The function of each module which traditional LDO needs is mixed into an easier circuit,thus the chip area and the quiescent cur?rent are greatly reduced. The simulation analysis of the circuit is conducted,and realized by 2 μm 36 V Bipolar technology,the tapeout result shows that the chip has the characteristic of high?current,micro?power and small size.