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 1.5 mA. The circuit achieves a very low supply current of 11muA, a low power of 27 muW, a line regulation of plusmn2.5 mWV and a load regulation of 14mV/mA. The bandgap reference is implemented in a 1 mum pure CMOS process with V_thn ap |V_thp| ~0.9 V at 25degC. 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.