High‐efficiency low‐noise pulse‐width modulation DC–DC buck converter based on multi‐partition switching for mobile system‐on‐a‐chip applications

Abstract

This study presents a high-efficiency low-noise pulse-width modulation (PWM) DC-DC buck converter based on multi-partition switching for mobile system-on-a-chip applications. A multi-partition switching technique is employed for the control of large current driving switches to minimise the switching noise. In addition, a PWM control with a switching frequency of 2 MHz is applied for the driving of output stage with a heavy load to optimise the power efficiency. The prototype DC-DC buck converter with an active die area of 0.28 mm 2 was implemented using a 0.18 µm bipolar-CMOS-DMOS (BCD) process. The peak power efficiency is 93%, while supplying an output current of 200 mA and an output voltage of 1.8 V.

A novel DC-DC converter and LDO cascaded circuit with improved dynamic response and loop stability

“…With the rapid growth of the demand for various portable devices and wearable electronic products, the demand for high-performance power management chips is also increasing. The efficiency of DC-DC converters can reach more than 90% [1,2,3,4,5,6,7,8,9]. However, its large output ripple limits its applications in sensitive electronic load where additional LDO is required to achieve low power noise and ripple [10,11,12,13,14,15,16,17,18,19].…”

Avoiding instabilities in power electronic systems: toward an on‐chip implementation

“…The purpose of this paper is to present the approach in a general framework (both theoretically and experimentally) and to provide guidelines for the design of a controller chip that can implement these ideas. Unlike the existing general chips [14, 15] and application specific chips [16, 17], the proposed chip will provide the reliable stable operation for larger parameter ranges by tuning the external resistors proposed controller chip only.…”

PI kontrolcü tabanlı yeni bir kontrol yapısının yükseltici DA-DA çevirici için tasarımı

“…Diğer tip DA-DA çeviriciler olan alçaltıcı ve alçaltıcı-yükseltici DA-DA çeviriciler de olduğu gibi [5,6], yükseltici çeviricide doğru gerilim dönüşümü çevirici PWM anahtarlama oranına bağlıdır. İdeal olarak, çevirici giriş ve çıkış gerilimi arasındaki ilişki sistem parametrelerinden bağımsız anahtarlama oranına bağlı cebirsel olarak elde edilebilir.…”