0.6 V operation, 26% smaller voltage ripple, 9% energy efficient boost converter with adaptively optimized comparator bias-current for ReRAM program in low power IoT embedded applications

The Internet of Things (IoT) applies the sensors and MCUs on various machines, devices and equipment, and connect them through internet. The emerging non-volatile memory, Resistive Random Access Memory (ReRAM) is suitable for the sensor data storage because of the low voltage and low power program operation. In this paper, the proposed 0. 6 V operation, 0.27 mm2 die size boost converter is demonstrated to achieve low ReRAM program voltage ripple (Cripple) and high energy efficiency (η), simultaneously, by using the 2 μA to 8 μA adaptive comparator current (ICMP). In detail, for one ReRAM cell program, the proposed boost converter reduces VRIPPLE by 26% compared with the conventional boost converter with fixed 2 μA small ICMP. For 16 ReRAM cells program, the proposed boost converter improves 8.9% energy efficiency compared with the conventional boost converter with fixed 8 μA large ICMP.