A Low-Power High-Output-Driving CMOS Voltage Reference with ±0.5% Trimming Accuracy

We present a CMOS bandgap voltage reference with a low quiescent current and high output current driving capability of up to 1.5mA. The circuit achieves a very low supply current of 11μA, a low power of 27μW, a line regulation of ±2.5 mWV and a load regulation of 14mV/mA. The bandgap reference is implemented in a 1μm pure CMOS process with V
_thn
≈ |V
_thp
| ≈0.9 V at 25°C. Experimental results show the silicon measurements are in good agreement with simulations. The proposed reference circuit constitutes a versatile solution in switching mode power supply (SMPS) and portable applications, due to its driving capability and low power consumption.