Analysis and Design of Ultrafast Series Capacitor Trans-Inductor Voltage Regulator With Constant On-Time Control
Bibliographic record
Abstract
In this article, a multiphase series capacitor trans-inductor voltage regulator (SCTLVR) based on constant on-time control in data center point-of-load applications is proposed. The series capacitor structure divides the high input voltage among each Buck cell, effectively doubling the equivalent step-down ratio and duty cycle while halving the switch voltage stress. In addition, the output inductors are indirectly coupled through an electrical connection. Benefiting from low equivalent transient inductance and current-mode constant on-time (CMCOT) control, it demonstrates an ultrafast dynamic response. Both steady-state and transient operations are thoroughly analyzed. This article provides a detailed analysis of the design considerations for the SCTLVR, which employs CMCOT control. A 24 V input, 1.2 V output, and 120 A rated prototype is designed to validate the proposed concept. This prototype achieves 91.1% peak efficiency and demonstrates exceptional dynamic response under 1000 A/$\mu$s current slew rate. The voltage overshoot and undershoot are less than 2% of the nominal output value. The experimental results align closely with the theoretical analysis.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".