A Bandgap Reference Circuit Design for High Power Supply IC
MU Zai-xin · Dianzi qijian · 2008
Based on the TSMC 1.0 μm 40 V BCD process and the bandgap principle a reference circuit used in high voltage chip is designed.The simulation results show that a temperature coefficient of 13.3×10-6/℃ and output current up to 20 mA is achieved in the range of 10~25 V supply,and the output voltage is insensitive to the power supply.Compared with conventional reference circuit with high voltage power supply,the proposed circuit not only improves the precision and stability,but also has high current driving ability.Thus it can be used as internal voltage supply.