A current-mode buck-boost DC-DC converter with fast transient response
- A fast transient current-mode buckboost DC-DC converter for portable devices is presented. Running at 1 MHz the converter provides stable 3 V from a 2.7 V to 4.2 V Li-Ion battery. A small voltage under-/overshoot is achieved by fast transient techniques: (1) adaptive pulse skipping (APS) and (2) adaptive compensation capacitance (ACC). The proposed converter was implemented in a 0.25 μm CMOS technology. Load transient simulations confirm the effectiveness of APS and ACC. The improvement in voltage undershoot and response time at light-to-heavy load step (100 mA to 500 mA), are 17 % and 59 %, respectively, in boost mode and 40 % and 49 %, respectively, in buck mode. Similar results are achieved at heavy-to-light load step for overshoot and response time.
| Author of HS Reutlingen | Ehrhart, Andreas; Wicht, Bernhard |
|---|---|
| URN: | urn:nbn:de:bsz:rt2-opus4-10373 |
| URL: | https://www.mpc-gruppe.de/workshopbaende |
| ISSN: | 1868-9221 |
| Erschienen in: | MPC / Multi-Projekt-Chip-Gruppe Baden-Württemberg : Tagungsband zum Workshop der Multiprojekt-Chip-Gruppe Baden-Württemberg : Workshop Februar 2013, Mannheim |
| Publisher: | Hochschule Ulm |
| Place of publication: | Ulm |
| Editor: | Gerhard Forster |
| Document Type: | Conference proceeding |
| Language: | English |
| Publication year: | 2013 |
| Tag: | DC-DC converter; adaptive compensation capacitance; adaptive pulse skipping; buck-boost converter; fast transient |
| Issue: | 49 |
| Page Number: | 6 |
| First Page: | 17 |
| Last Page: | 22 |
| DDC classes: | 620 Ingenieurwissenschaften und Maschinenbau |
| Open access?: | Ja |
| Licence (German): |  Open Access |
