Product details


Vin (Min) (V) 4.5 Vin (Max) (V) 28 Vout (Min) (V) 0.5 Vout (Max) (V) 1.5 Iout (Max) (A) 60 Iq (Typ) (uA) 500 Switching frequency (Min) (kHz) 300 Switching frequency (Max) (kHz) 1000 Features Adjustable Current Limit, Dynamic Voltage Scaling, Enable, Light Load Efficiency, Phase Interleaving, Power Good, Pre-Bias Start-Up, Remote Sense, SVID, Synchronous Rectification Operating temperature range (C) -40 to 105 Regulated outputs (#) 1 Number of Phases 2 Rating Catalog open-in-new Find other Buck controllers (external switch)

Package | Pins | Size

VQFN (RSM) 32 16 mm² 4 x 4 open-in-new Find other Buck controllers (external switch)

Special Note

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The TPS51623 device is a driverless, fully SVID compliant, VR12.1 step-down controller. 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 TPS51623 device also supports single-phase operation in CCM or DCM for light-load efficiency. The TPS51623 device integrates the full complement of VR12.1 I/O features including VR_READY (PGOOD), ALERT and VR_HOT. The SVID interface address allows programming from 0 to 7. Adjustable control of VOUT slew rate and voltage positioning round out the VR12.1 features.

Paired with the TPS51604 FET gate driver, the solution delivers exceptionally high speed and low switching loss. The TPS51623 device works with selected TI power stage products for optimum efficiency as well as DrMOS products. The TPS51623 device operates with a default boot voltage of 1 V. Applications can override the default boot voltage by including an external resistor divider in the design.

The TPS51623 device package is a space saving, thermally enhanced 32-pin VQFN package that operates from –40°C to 105°C.


  • VR12.1 Serial VID (SVID) Compliant
  • 1- or 2-Phase Operation
  • Supports Only Zero Load Line Applications
  • 8-Bit DAC Output Range: 0.25 V to 1.52 V
  • Optimized Efficiency at Light and Heavy Loads
  • 8 Independent Levels of Overshoot Reduction (OSR) and Undershoot Reduction (USR)
  • Driverless Configuration for Efficient High-Frequency Switching
  • Supports Discrete, Power Block, Power Stage or DrMOS MOSFET Implementations
  • Accurate, Adjustable Voltage Positioning
  • 300-kHz to 1-MHz Frequency Selections
  • Patented AutoBalance Phase Balancing
  • Selectable 8-level Current Limit
  • 4.5-V to 28-V Conversion Voltage Range
  • Small, 4 mm × 4 mm, 32-Pin, VQFN PowerPad Package

Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet 2-Phase, D-CAP(tm)M Step-Down Controller for VR12.1 Vcpu datasheet Dec. 06, 2013
Technical articles How to create a power supply for Intel’s Braswell processor Aug. 10, 2015

Design & development

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PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Reference designs

High Power Density 9V-15V input Intel® Pentium™ N3700 VCC0+VCC1 design for Industrial PC
TIDA-00572 The TI TPS1623 VR12.1 reference design, supporting Intel® Pentium™ N3700 , uses TI's driverless PWM architecture with TI power stages for high power density, high efficiency, and low component count  while meeting Intel voltage tolerance requirements with low ripple, tight loadline (...)
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VQFN (RSM) 32 View options

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