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DDR2/3/3L/4 Memory Power Solution Synchronous Buck Controller


Package | PIN: RUK | 20
Temp: I (-40 to 85)
Carrier: Cut Tape
Qty Price
1-9 $1.12
10-24 $1.01
25-99 $0.94
100-249 $0.83
250-499 $0.77
500-749 $0.66
750-999 $0.56
1000+ $0.53


  • Synchronous Buck Controller (VDDQ)
    • Conversion Voltage Range: 3 V to 28 V
    • Output Voltage Range: 0.7 V to 1.8 V
    • 0.8%VREF Accuracy
    • Selectable ControlArchitecture
      • D-CAP™ Mode for Fast Transient Response
      • D-CAP2™ Mode for Ceramic Output Capacitors
    • Selectable 300 kHz,400 kHz, 500 kHz, or 670 kHz SwitchingFrequencies
    • Optimized Efficiency at Light and Heavy Loads with Auto-skipFunction
    • Supports Soft-Off in S4 and S5 States
    • OCL/OVP/UVP/UVLOProtections
    • Powergood Output
  • 2-A LDO(VTT), Buffered Reference(VTTREF)
    • 2-A (Peak) Sink and Source Current
    • Buffered, Low Noise, 10-mA VTTREF Output
    • 0.8%VTTREF, 20-mV VTT Accuracy
    • Supports High-Z (S3) and Soft-Off (S4,S5)
  • Thermal Shutdown
  • 20-Pin, 3 mm × 3 mm, QFN Package
  • Create a WEBENCH Design

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Texas Instruments  TPS51916RUKR

The TPS51916 device provides a complete power supply for DDR2, DDR3,DDR3L, and DDR4 memory systems in the lowest total cost and minimum space. It integrates asynchronous buck regulator controller (VDDQ) with a 2-A sink and2-A source tracking LDO (VTT) and buffered low noise reference (VTTREF).

The device employs D-CAP™ mode coupled with 300 kHz or 400 kHzfrequencies for ease-of-use and fast transient response or D-CAP2™ mode coupled with higher500 kHz or 670 kHz frequencies to support ceramic output capacitorwithout an external compensation circuit. The VTTREF tracks VDDQ/2 within excellent 0.8% accuracy.The VTT, which provides 2-A sink and 2-A source peakcurrent capabilities, requires only 10-µF of ceramic capacitance. A dedicated LDO supply input isavailable.

The device also provides excellent power supply performance. It supports flexible powerstate control, placing VTT at high-Z in S3 and discharging VDDQ, VTT and VTTREF (soft-off) in S4 orS5 state. Programmable OCL with low-side MOSFET RDS(on) sensing, OVP, UVP,UVLO and thermal shutdown protections are also available.