A Current-Mode Hysteretic Buck Converter With Multiple-Reset RC-Based Inductor Current Sensor

Min Gyu Jeong, Jin Gyu Kang, Jeongpyo Park, Changsik Yoo

Research output: Contribution to journalArticleResearchpeer-review

Abstract

A current-mode hysteretic buck converter is described in which inductor current is sensed by a resistor-capacitor (RC) network. The inductor current sensing RC network is reset multiple times per switching clock period, which allows it to have time constant much smaller than switching clock period and therefore occupy small silicon area. A frequency regulator ensures the switching frequency to be constant regardless of the operating condition of the buck converter and also integrates comparator delay compensator as its loop filter. The current-mode hysteretic buck converter implemented in a 65 nm complementary metal-oxide-semiconductor (CMOS) process provides 0.6-2.0 V output from 3.3 V input with 1 MHz switching frequency. The maximum load current is 1.5 A and the measured peak power efficiency is 96.3%.

Original languageEnglish
Article number8600760
Pages (from-to)8445-8453
Number of pages9
JournalIEEE Transactions on Industrial Electronics
Volume66
Issue number11
DOIs
StatePublished - 2019 Nov 1

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Switching frequency
Resistors
Clocks
Capacitors
Sensors
Silicon
Metals
Oxide semiconductors

Keywords

  • Buck converter
  • CMOS current-mode
  • DC-DC converter
  • hysteretic control
  • inductor current sensor

Cite this

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title = "A Current-Mode Hysteretic Buck Converter With Multiple-Reset RC-Based Inductor Current Sensor",
abstract = "A current-mode hysteretic buck converter is described in which inductor current is sensed by a resistor-capacitor (RC) network. The inductor current sensing RC network is reset multiple times per switching clock period, which allows it to have time constant much smaller than switching clock period and therefore occupy small silicon area. A frequency regulator ensures the switching frequency to be constant regardless of the operating condition of the buck converter and also integrates comparator delay compensator as its loop filter. The current-mode hysteretic buck converter implemented in a 65 nm complementary metal-oxide-semiconductor (CMOS) process provides 0.6-2.0 V output from 3.3 V input with 1 MHz switching frequency. The maximum load current is 1.5 A and the measured peak power efficiency is 96.3{\%}.",
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A Current-Mode Hysteretic Buck Converter With Multiple-Reset RC-Based Inductor Current Sensor. / Jeong, Min Gyu; Kang, Jin Gyu; Park, Jeongpyo; Yoo, Changsik.

In: IEEE Transactions on Industrial Electronics, Vol. 66, No. 11, 8600760, 01.11.2019, p. 8445-8453.

Research output: Contribution to journalArticleResearchpeer-review

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