Title :
A 1.2µW SIMO energy harvesting and power management unit with constant peak inductor current control achieving 83–92% efficiency across wide input and output voltages
Author :
Shrivastava, Ashish ; Ramadass, Yogesh K. ; Khanna, Saarthak ; Bartling, Steven ; Calhoun, Benton H.
Author_Institution :
Texas Instrum., Dallas, TX, USA
Abstract :
This paper presents a single inductor energy harvesting and power management (EHM) unit for ultra-low power (ULP) systems. The proposed circuit harvests energy from solar cells from 0.38V input voltage (Vin) and provides 4 output voltages - storage at 5V and VDDs at 3.3V, 1.5V and 1.2V. A peak inductor current control scheme enables high efficiency operation across wide input and output voltage range. The IC supports maximum power point tracking, battery management, and cold starts from 0.38V Vin.
Keywords :
electric current control; energy harvesting; low-power electronics; solar cells; EHM unit; IC; SIMO energy harvesting; ULP system; battery management; efficiency 83 percent to 92 percent; input-output voltage range; maximum power point tracking; peak inductor current control scheme; power 1.2 muW; single inductor energy harvesting-power management unit; solar cells; ultra-low power systems; voltage 0.38 V; voltage 1.2 V; voltage 1.5 V; voltage 3.3 V; voltage 5 V; Batteries; Inductors; Rails; Switches; Voltage control; Voltage measurement;
Conference_Titel :
VLSI Circuits Digest of Technical Papers, 2014 Symposium on
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4799-3327-3
DOI :
10.1109/VLSIC.2014.6858364
