A fully integrated self-oscillating switched-capacitor DC-DC converter for near-threshold loads

Turnquist, Matthew J.; Hiienkari, Markus; Makipaa, Jani; Koskinen, Lauri

doi:10.1109/asscc.2015.7387441

Cited by 2 publications

(2 citation statements)

References 10 publications

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“…In this work, the first (2:1) step-down selfoscillating DC-DC converter with a NT output voltage (V OUT ) is presented [9]. It is designed in 28 nm ultra-thin body and buried oxide fullydepleted SOI (UTBB FD-SOI).…”

Section: Introductionmentioning

confidence: 99%

SELF OSCILLATING SWITCHED- CAPACITOR DC-DC CONVERTOR USING 28nm UTBB FD-SOI

2018

IJRTER

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Abstract:The importance of energy-especially for ultraportable sensor-based platforms for the Internet-of-Things (IoT). Processors for these IoT applications primarily operate at nearthreshold (NT) voltages and have multiple power modes. Achieving high conversion efficiency within the DC-DC converter that supplies these processors is critical since energy consumption of the DC-DC/processor system is proportional to the DC-DC converter efficiency. The DC-DC converter must maintain high efficiency over a large load range generated from the multiple power modes of the processor. This paper presents a fully integrated step-down self-oscillating switched-capacitor DC-DC converter that is capable of meeting these challenges. The area of the converter is 0.0104 mm 2 and is designed in 28 nm ultra-thin body and buried oxide fully-depleted SOI (UTBB FD-SOI). Back-gate biasing within FD-SOI is utilized to increase the load power range of the converter. With an input of 1 V and output of 460 mV, measurements of the converter show a minimum efficiency of 75% for 79 nW to 200 µW loads. Measurements with an off-chip NT processor load show efficiency up to 86%. The converter's large load power range and high efficiency make it an excellent fit for energyconstrained processors.

show abstract

Section: Introductionmentioning

confidence: 99%

SELF OSCILLATING SWITCHED- CAPACITOR DC-DC CONVERTOR USING 28nm UTBB FD-SOI

2018

IJRTER

View full text Add to dashboard Cite

show abstract

“…In this work, the first (2:1) step-down self-oscillating DC-DC converter with a NT output voltage (VOUT) is presented [9]. It is designed in 28 nm ultra-thin body and buried oxide fully-depleted SOI (UTBB FD-SOI).…”

Section: Introductionmentioning

confidence: 99%

A Fully Integrated 2:1 Self-Oscillating Switched-Capacitor DC–DC Converter in 28 nm UTBB FD-SOI

Turnquist

Hiienkari

Makipaa

et al. 2016

JLPEA

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Abstract:The importance of energy-constrained processors continues to grow especially for ultra-portable sensor-based platforms for the Internet-of-Things (IoT). Processors for these IoT applications primarily operate at near-threshold (NT) voltages and have multiple power modes. Achieving high conversion efficiency within the DC-DC converter that supplies these processors is critical since energy consumption of the DC-DC/processor system is proportional to the DC-DC converter efficiency. The DC-DC converter must maintain high efficiency over a large load range generated from the multiple power modes of the processor. This paper presents a fully integrated step-down self-oscillating switched-capacitor DC-DC converter that is capable of meeting these challenges. The area of the converter is 0.0104 mm 2 and is designed in 28 nm ultra-thin body and buried oxide fully-depleted SOI (UTBB FD-SOI). Back-gate biasing within FD-SOI is utilized to increase the load power range of the converter. With an input of 1 V and output of 460 mV, measurements of the converter show a minimum efficiency of 75% for 79 nW to 200 µW loads. Measurements with an off-chip NT processor load show efficiency up to 86%. The converter's large load power range and high efficiency make it an excellent fit for energy-constrained processors.

show abstract

A fully integrated self-oscillating switched-capacitor DC-DC converter for near-threshold loads

Cited by 2 publications

References 10 publications

SELF OSCILLATING SWITCHED- CAPACITOR DC-DC CONVERTOR USING 28nm UTBB FD-SOI

SELF OSCILLATING SWITCHED- CAPACITOR DC-DC CONVERTOR USING 28nm UTBB FD-SOI

A Fully Integrated 2:1 Self-Oscillating Switched-Capacitor DC–DC Converter in 28 nm UTBB FD-SOI

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