Design of an Integrated Voltage Reference with High-precision and Wide Power Supply Range
Xinghua Fu · Microelectronics & Computer · 2011
In SOCs and smart power ICs,it is more and more important that the voltage reference works within wide power supply range outputs large load current.In this paper,a voltage reference with high-precision,large load current and wide power supply range was proposed based on the CSMC 40V BCD process.Its output voltage is 5 V.In order to broaden the range of the power,a HV_PMOS was used to isolate the power and operating power of the reference circuit.The high-precision profits from the Double Close-loop Feedback circuit.And then,electrical characteristics of this circuit were verified in the Spectre simulator under the Cadence environment.The output voltage is 5 V,the range of its power supply is 9~30 V,the temperature coefficient is 5.688×10-6/℃ within-20~125℃,the start time is 6.369 μs,the range of load current is 0~40 mA.