Modeling the Substrate Noise Injected by a DC-DC Converter

Binet, Vincent; Savaria, Yvon; Meunier, M.; Gagnon, Yves

doi:10.1109/iscas.2007.378397

Cited by 7 publications

(2 citation statements)

References 7 publications

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“…The switching noise of the monolithic DC-DC converter is coming from the non-ideal properties of the on-chip power stage, chip package, and PCB trace [4][5][6]. The circuit of a monolithic buck converter with the parasitic components is shown in Figure 1 (b).…”

Section: Switching Noise and Its Individual Contributionsmentioning

confidence: 99%

Substrate switching noise analysis and layout/circuit considerations in monolithic power converters

Fan

Harrison

2012

2012 IEEE Energy Conversion Congress and Exposition (ECCE)

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A monolithic power converter has the analog control circuit and the switching power stage integrated on the same silicon die. The noise generated by the switching power stage can affect the sensitive analog circuits through the shared common substrate and degrade the system performance. Although much literature has been published about the substrate noise generated by digital circuits in mixed-signal systems, the analysis methods and results may not apply for monolithic power converters. Monolithic power converters use different process technologies, have much higher noise peak voltages, and have noise that is synchronized to the pulse-width modulator (PWM) switching period. To handle strong switching noise that exists in monolithic power converters, analysis of the sources of the switching noise, the noise paths, and the noise effects on analog circuitry is necessary. The noise effects on the PWM control circuit are explained in this paper, and a circuit and layout design guide helps to improve the substrate switching noise immunity. The experimental results show the noise immunity improvements.

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Section: Switching Noise and Its Individual Contributionsmentioning

confidence: 99%

Substrate switching noise analysis and layout/circuit considerations in monolithic power converters

Fan

Harrison

2012

2012 IEEE Energy Conversion Congress and Exposition (ECCE)

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“…Unfortunately, switching injects noise to the output. Recent studies to model this noise show that its magnitude can be considerably higher than the value predicted by available simulators [1]. Hence, switching regulators are avoided when noise level is of main concern.…”

Section: Introductionmentioning

confidence: 99%

Circuit-level Design of a Power Supply Unit with Extra Low-noise Output for Portable Integrated SoCs

Aminzadeh¹,

Bakhshi²

2012

IJCA

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Switch-mode voltage regulators are considered as the dominant choice for low-power integrated power supplies. Employing the advantages of a switch-mode voltage regulator in 0.18µm CMOS technology, a power supply has been designed for a complete System-on-Chip (SoC). While offering enough drive capability for the entire system, the supply provides an extra highly-regulated output for noisesensitive analog blocks. At first, a front-end buck regulator converts the time-variant unregulated input voltage to an initially-regulated general voltage. To further regulate this voltage for noise-sensitive blocks, a new continuous-time buffered voltage source has been added to the circuit. To maximize power efficiency and to benefit from an initiallyregulated input, this source is connected to the front-end switch-mode regulator output. For proper operation, the minimum input voltage to the supply is 1.3V. With this minimum input voltage, the 1.1V switching regulator sources up to 1A output current. The continuous-time 0.9V-buffered source provides up to 100mA for noise-sensitive units. It converts the 1.1V regulated voltage to a 0.9V smooth output.

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