High efficiency DC-DC converter with auto-mode transition for mobile SOC applications

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 ke...

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Bibliographic Details
Main Authors: Seungchul Shin, Donghun Heo, Hyungjong Ko, Byeongha Park
Format: Conference Proceeding
Language:English
Subjects:
Auto-mode control
Converters
DC-DC Converter
Inductors
Pulse frequency modulation(PFM)
Pulse width modulation
Pulse width modulation (PWM)
Switches
System-on-a-chip
Voltage control
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Description
Summary: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.
DOI:10.1109/SOCDC.2010.5682899