Title :
High efficiency DC-DC converter with auto-mode transition for mobile SOC applications
Author :
Shin, Seungchul ; Heo, Donghun ; Ko, Hyungjong ; Park, ByeongHa
Author_Institution :
Mixed Signal Core Design Team, Samsung Electron., Yongin, South Korea
Abstract :
This paper describes an integrated dual-mode DC-DC converter and its seamless auto-mode transition between the pulse frequency modulation (PFM) and the pulse width modulation (PWM), resulting in reduced inductor current peak and output voltage overshoot. The key idea of auto-mode transition is to keep a control voltage level as a constant by forming a negative feedback loop with a compensator in the PFM operation. The DC-DC converter was implemented in the L6LP (65 nm) process and achieved maximum 91% of measured efficiency for the load current ranging from 5 mA to 200 mA.
Keywords :
DC-DC power convertors; pulse frequency modulation; pulse width modulation; system-on-chip; voltage control; current 5 mA to 200 mA; integrated dual-mode DC-DC converter; mobile system-on-chip; negative feedback loop; pulse frequency modulation; pulse width modulation; seamless auto-mode transition; size 65 nm; voltage level control; Converters; Inductors; Pulse width modulation; Switches; System-on-a-chip; Voltage control; Auto-mode control; DC-DC Converter; Pulse frequency modulation(PFM); Pulse width modulation (PWM);
Conference_Titel :
SoC Design Conference (ISOCC), 2010 International
Conference_Location :
Seoul
Print_ISBN :
978-1-4244-8633-5
DOI :
10.1109/SOCDC.2010.5682899
