3-Phase, D-CAP+™ step-down controller for VR12.6/VR12.6+ VCPU

The TPS51633 device is a driverless

step-down controller that is fully compliant with the SVID communications protocol,

meeting the Intel VR12.6 specification. Advanced control features such as D-CAP+

architecture with overlapping pulse support undershoot reduction (USR) and overshoot

reduction (OSR) provide fast transient response, lowest output capacitance and high

efficiency. The TPS51633 device also supports single-phase operation in CCM or DCM for

light-load efficiency. The TPS51633 device integrates the full complement of VR12.6 I/O

features including VRREADY (PGOOD), ALERT and

VRHOT. The SVID interface address allows programming from 0 to

7. In PS4, the quiescent power

consumption of the controller is typically 0.25 mW. Adjustable control of VCPU slew rate

and voltage positioning round out the VR12.6 features. Paired with the new TPS51604 FET

gate driver, the solution delivers exceptionally high speed and low switching loss. The

TPS51633 device works with selected TI Power Stage™ products for optimum efficiency as

well as DrMOS products. The TPS51633 device is available in

space saving, thermally enhanced 32-pin QFN package that operates from –40°C to

105°C.