Open AccessVoltage‐mode hysteretic control techniques for high‐current single‐inductor multiple‐output switching regulators
Author(s) -
Huang Cheng,
Lee Sangwon
Publication year - 2020
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2019.3952
Subject(s) - inductor , converters , voltage , control theory (sociology) , comparator , transient response , power (physics) , cmos , steady state (chemistry) , transient (computer programming) , electronic engineering , engineering , electrical engineering , computer science , physics , control (management) , operating system , chemistry , quantum mechanics , artificial intelligence
In this Letter, two comparator‐based voltage‐mode hysteretic controller designs are proposed to enhance dynamic response for single‐inductor multiple‐output (SIMO) switching converters to minimise over‐/under‐shoot voltages due to self‐ and cross‐regulations in fast load transients, especially with high output power and large current steps. The proposed converters are designed and simulated in a 65 nm CMOS process with standard I/O devices. With the proposed techniques, the output voltage fluctuations, including steady‐state voltage ripples and over‐/under‐shoot voltages due to self‐ and cross‐regulations during a 1.8 A load transient in 1 ns, are kept within 60 mV. The proposed converter delivers more than 3 A maximum load current per output and a maximum total output power above 6 W, with a peak efficiency above 90%. Compared to state‐of‐the‐art SIMO converters, this work achieves a significantly higher output power capacity and faster dynamic response thus smaller self‐ and cross‐regulations within 0.033 mV/mA.