Low-ripple hysteretic-controlled monolithic buck converter with adapted switching frequency for large step-down ratio applications

Low-ripple hysteretic-controlled monolithic buck converter with adapted switching frequency for large step-down ratio applications

20V maximum input voltage and 1A load current hysteretic control based monolithic buck converter with phase locked loop (PLL) is presented. To achieve advantage of hysteretic control and reduce inductor current ripple with ceramic output capacitor, hysteretic based control with PLL is adopted. Furth...

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Bibliographische Detailangaben
Hauptverfasser: Se-Won Wang, Young-Jin Woo, Young-Sub Yuk, Byunghun Lee, Gyu-Ha Cho, Gyu-Hyeong Cho
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Capacitors
Ceramics
Frequency conversion
Inductors
Phase locked loops
Switching frequency
Voltage control
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Beschreibung
Zusammenfassung:20V maximum input voltage and 1A load current hysteretic control based monolithic buck converter with phase locked loop (PLL) is presented. To achieve advantage of hysteretic control and reduce inductor current ripple with ceramic output capacitor, hysteretic based control with PLL is adopted. Furthermore, in order to decrease inductor current ripple due to wide input voltage range, switching frequency is adapted to the input supply voltage. This buck converter is fabricated with 0.35 μm high voltage BiCMOS-DMOS (BCD) process.
ISSN:1048-2334
2470-6647
DOI:10.1109/APEC.2011.5744793