Abstract
This paper suggests a multi-level and multi-output SMPS based on a shared digital logic controller through independently operating in each dedicated time periods. Although the shared architecture can be devised with small area and high efficiency, it has critical drawbacks that real-time control of each DPWM generators are impossible and its output voltage can be unstable. To solve these problems, a real-time current compensation scheme is proposed as a solution. A current consumption of the core block and entire block with four driver buffers was simulated about 4.9mA and 30mA at 10MHz switching frequency and 100MHz core operating frequency. Output voltage ripple was 11 mV at 3.3V output voltage. Over/undershoot voltage was 10mV/19.6mV at 3.3V output voltage. The noise performance was simulated at 800mA and 100KHz load regulation. Core circuit can be implemented small size in 700μm x 800μm area. For the verification of proposed circuit, the simulations were carried out with Dong-bu Hitek BCD 0.35μm technology.
| Translated title of the contribution | One-Chip Multi-Output SMPS using a Shared Digital Controller and Pseudo Relaxation Oscillating Technique |
|---|---|
| Original language | Korean |
| Pages (from-to) | 148-156 |
| Number of pages | 9 |
| Journal | 전자공학회논문지 |
| Volume | 50 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 2013 |