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

fYear

2014

fDate

10-13 June 2014

Firstpage

1

Lastpage

2

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 V_DDs 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;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Circuits Digest of Technical Papers, 2014 Symposium on

Conference_Location

Honolulu, HI

Print_ISBN

978-1-4799-3327-3

Type

conf

DOI

10.1109/VLSIC.2014.6858364

Filename

6858364