A 0.1–0.6 V input range voltage boost converter with low-leakage driver for low-voltage energy harvesting

A Review of Charge Pump Topologies for the Power Management of IoT Nodes

“…By inspection of Figure 14a it is apparent that the solution reported in [2] achieves the lowest value of minimum supply voltage (75 mV), but with one of the lowest values of VCE (50%). Consequently, its overall performance appears lower than [3,15,19] which, while exhibiting higher values of minimum supply voltage (100 mV, 150 mV, and 150 mV, respectively), show much higher values of VCE (91%, 86% and 80%, respectively). Additional information is gathered by inspection of Figure 14b.…”

“…Electronics 2018, 7, x FOR PEER REVIEW 2 of 14 extracted from surrounding environment, towards a storage buffer. Hence, presently their field of application includes energy-autonomous systems, such as battery-less circuits, biomedical implants and, more recently, IoT nodes [1][2][3][4][12][13][14][15][16][17][18][19][20][21][22][23]. In this latter context, the design of a PMIC based on CPs is a challenging task since it must fulfill a very low input voltage supply (few hundreds of millivolts and high-power conversion efficiency).…”

“…In literature many variants have been proposed for the basic topology of Figure 10c. One of these topologies was proposed by Luo et al [51], in which pMOSFETs are bootstrapped to improve power efficiency up to 69%, with an output current of 3.5 mA and a voltage of 10.5 V. In the same year, Tsuji et al [19] suggested a low-leakage driver for the main complementary MOSFETs of a latched CP to improve current drivability with a low input voltage (100 mV).…”

“…Charge pumps have been traditionally adopted in nonvolatile memories and SRAMs, in which the design is driven by settling time and low area, or RF antenna switch controllers and LCD drivers, where the main design constraint is the current drivability [9][10][11]. More recently, CPs are widely used to adapt the voltage levels between two or more functional blocks and to convey the electric energy, and, more recently, IoT nodes [1][2][3][4][12][13][14][15][16][17][18][19][20][21][22][23]. In this latter context, the design of a PMIC based on CPs is a challenging task since it must fulfill a very low input voltage supply (few hundreds of millivolts and high-power conversion efficiency).…”

Low-Voltage Capacitive-Based Step-Up DC-DC Converters for RF Energy Harvesting System: A Review

“…In a capacitivebased step-up DC-DC converter, charge is transferred from a supply voltage (VDD) or the output DC voltage of a rectifier (Vout,rec) to RLoad through Cpump which are activated by Si using two alternating clock signals, Φ1, and Φ2. The clock signals alternate sequentially to activate the switches to avoid short circuit losses or latch-up[45].…”