Details

Autor(en) / Beteiligte

• Sturcken, N.
• O'Sullivan, E. J.
• Wang, N.
• Herget, P.
• Webb, B. C.
• Romankiw, L. T.
• Petracca, M.
• Davies, R.
• Fontana, R. E.
• Decad, G. M.
• Kymissis, I.
• Peterchev, A. V.
• Carloni, L. P.
• Gallagher, W. J.
• Shepard, K. L.

Titel

A 2.5D Integrated Voltage Regulator Using Coupled-Magnetic-Core Inductors on Silicon Interposer

Ist Teil von

• IEEE journal of solid-state circuits, 2013-01, Vol.48 (1), p.244-254

Ort / Verlag

New York, NY: IEEE

Erscheinungsjahr

2013

Link zum Volltext

• IEEE_Xplore

Quelle

IEEE Electronic Library (IEL)

Beschreibungen/Notizen

• An integrated voltage regulator (IVR) is presented that uses custom fabricated thin-film magnetic power inductors. The inductors are fabricated on a silicon interposer and integrated with a multi-phase buck converter IC by 2.5D chip stacking. Several inductor design variations have been fabricated and tested. The best performance has been achieved with a set of eight coupled inductors that each occupies 0.245 mm 2 and provides 12.5 nH with 270 mΩ DC. With early inductor prototypes, the IVR efficiency for a 1.8 V:1.0 V conversion ratio peaks at 71% with FEOL current density of 10.8 A/mm 2 and inductor current density of 1.53 A/mm 2 . At maximum load current, 69% conversion efficiency and 1.8 V:1.2 V conversion ratio the FEOL current density reaches 22.6 A/mm 2 and inductor current density reaches 3.21 A/mm 2 .