TY - GEN
T1 - Slew-rate controlled output stages for switching DC-DC converters
AU - Liu, Jia Ming
AU - Huang, Yi Cheng
AU - Ying, Yu Chun
AU - Kuo, Tai Haur
PY - 2011/6/24
Y1 - 2011/6/24
N2 - Large supply bouncing due to the fast switching current and parasitic inductance of the supply rail may cause reliability and electromagnetic interference (EMI) problems, especially for ICs with the pulse-width modulation (PWM) technique, such as switching DC-DC converters. In this paper, a new slew-rate controlled (SRC) output stage is proposed to appropriately increase the rise and fall times of the PWM output by combining a feedback capacitor technique and a distributedand- weighted design. Therefore, the supply bouncing during PWM switching can be reduced. The SRC output stage is successfully integrated into a DC-DC converter implemented with a 0.35mm 1P4M 3.3V mixed-signal CMOS process for verification. With an input voltage of 3.3V, an output voltage of 1.8V, a switching frequency of 500 kHz, and a load current range of 700mA, the active area of the converter is 2.3mm2. With a merely 0.035mm2 control circuit for the SRC output stage, the measured supply bouncing of the designed converter can be reduced by 40% and thus the reliability and the EMI can be improved.
AB - Large supply bouncing due to the fast switching current and parasitic inductance of the supply rail may cause reliability and electromagnetic interference (EMI) problems, especially for ICs with the pulse-width modulation (PWM) technique, such as switching DC-DC converters. In this paper, a new slew-rate controlled (SRC) output stage is proposed to appropriately increase the rise and fall times of the PWM output by combining a feedback capacitor technique and a distributedand- weighted design. Therefore, the supply bouncing during PWM switching can be reduced. The SRC output stage is successfully integrated into a DC-DC converter implemented with a 0.35mm 1P4M 3.3V mixed-signal CMOS process for verification. With an input voltage of 3.3V, an output voltage of 1.8V, a switching frequency of 500 kHz, and a load current range of 700mA, the active area of the converter is 2.3mm2. With a merely 0.035mm2 control circuit for the SRC output stage, the measured supply bouncing of the designed converter can be reduced by 40% and thus the reliability and the EMI can be improved.
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U2 - 10.1109/ICICDT.2011.5783224
DO - 10.1109/ICICDT.2011.5783224
M3 - Conference contribution
AN - SCOPUS:79959352564
SN - 9781424490202
T3 - 2011 IEEE International Conference on Integrated Circuit Design and Technology, ICICDT 2011
BT - 2011 IEEE International Conference on Integrated Circuit Design and Technology, ICICDT 2011
T2 - 2011 IEEE International Conference on Integrated Circuit Design and Technology, ICICDT 2011
Y2 - 2 May 2011 through 4 May 2011
ER -