TPS51678 2-Phase, D-CAP+TM Step-Down Controller for VR12.6 V.CPU |

TPS51678 (ACTIVE) 2-Phase, D-CAP+TM Step-Down Controller for VR12.6 V.CPU

2-Phase, D-CAP+TM Step-Down Controller for VR12.6 V.CPU - TPS51678

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    The TPS51678 is a fully-compliant, driverless Intel VR12.6 SVID CPU Core step-down PWM controller that uses a 4.5V to 28V power conversion voltage range. It can be selected for 1 or 2-phase operation. Advanced control features such as D-Cap+TM architecture with overlapping pulse support (undershoot reduction, USR) and overshoot reduction (OSR) provide fast transient response, lowest output capacitance and high efficiency. The TPS51678 also supports single phase operation in CCM or DCM for light load efficiency. The device also has I2C serial interface that enables it to communicate with the TPS650800 and TPS650810 PMICs such that the 3-chip TI solution can act and respond to thermal conditions and enter emergency shutdown as a virtual single IC. The I2C interface also enables voltage margining of the Vcore power supply, and allows the designer to test basic Intel VR12.6 SVID commands without a VTT tool. The TPS51678 IC has the full complement of VR12.6 I/O including VR_READY, ALERT# and VR_HOT#. The SVID interface address can be programmed from 0 to 7. In PS4, the quiescent power of the complete power converter approaches maximum 0.55mW. 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. In addition, TPS51678 can be used with selected TI Power Stage™ products for optimum efficiency, as well as DrMOS products. The device is packaged in a space saving, thermally enhanced 32-pin QFN and operates from -40° C to 105° C.


  • Input Voltage Range 4.5V to 28V
  • 1-2 phase Driverless PWM Controller
  • VR12.6 SVID Protocol and Interface
  • D-CAP+TM mode Architecture
  • AutoBalance™ Phase-to-Phase Current Sharing
  • On Time Extension
  • Up to 1.5MHz Switching Frequency
  • Thermal Information/Shutdown Interface w/PMICs
  • OSR™/USR™ and Pulse Truncation
  • 32L 4x4 QFN Package w/1mm Height


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Part number Order Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Iout (Max) (A) Regulated outputs (#) Number of Phases Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Features Duty cycle (Max) (%) Operating temperature range (C) Rating Package Group Type Control mode
TPS51678 Order now 4.5     28     0.5     2.3     40     1     2     300     1500     3.9     I2C
50     -40 to 105     Catalog     VQFN | 32     Controller     D-CAP+