Product details


DDR memory type DDR, DDR2, DDR3, DDR3L, LPDDR2, LPDDR3 Control mode D-CAP, S4/S5 Iout VDDQ (Max) (A) 20 Iout VTT (Max) (A) 2 Iq (Typ) (mA) 0.6 Output VDDQ, VREF, VTT Vin (Min) (V) 3 Vin (Max) (V) 28 Features Shutdown Pin for S3 Rating HiRel Enhanced Product Operating temperature range (C) -55 to 125 open-in-new Find other DDR memory power ICs

Package | Pins | Size

WQFN (RUK) 20 9 mm² 3 x 3 open-in-new Find other DDR memory power ICs


  • Synchronous Buck Controller (VDDQ)
    • Conversion Voltage Range: 3 to 28 V
    • Output Voltage Range: 0.7 to 1.8 V
    • 0.8% VREF Accuracy
    • D-CAP Mode for Fast Transient Response
    • Selectable 300-kHz/400-kHz Switching Frequencies
    • Optimized Efficiency at Light and Heavy Loads With Auto-Skip Function
    • Supports Soft-Off in S4/S5 States
    • OCL/OVP/UVP/UVLO Protections
    • Powergood Output
  • 2-A LDO (VTT), Buffered Reference (VTTREF)
    • 2-A (Peak) Sink and Source Current
    • Requires Only 10-µF of Ceramic Output Capacitance
    • Buffered, Low Noise, 10-mA VTTREF Output
    • 0.8% VTTREF, 20-mV VTT Accuracy
    • Support High-Z in S3 and Soft-Off in S4/S5
  • Thermal Shutdown
  • 20-Pin, 3 mm × 3 mm, WQFN Package
  • Supports Defense, Aerospace, and Medical Applications
    • Controlled Baseline
    • One Assembly/Test Site
    • One Fabrication Site
    • Available in Military (-55°C to 125°C) Temperature Range(1)
    • Extended Product Life Cycle
    • Extended Product-Change Notification
    • Product Traceability
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The TPS51216-EP provides a complete power supply for DDR2, DDR3 and DDR3L memory systems in the lowest total cost and minimum space. It integrates a synchronous buck regulator controller (VDDQ) with a 2-A sink/source tracking LDO (VTT) and buffered low noise reference (VTTREF). The TPS51216-EP employs D-CAP mode coupled with 300 kHz/400 kHz frequencies for ease-of-use and fast transient response. The VTTREF tracks VDDQ/2 within excellent 0.8% accuracy. The VTT, which provides 2-A sink/source peak current capabilities, requires only 10-µF of ceramic capacitance. In addition, a dedicated LDO supply input is available.

The TPS51216-EP provides rich useful functions as well as excellent power supply performance. It supports flexible power state control, placing VTT at high-Z in S3 and discharging VDDQ, VTT, and VTTREF (soft-off) in S4/S5 state.

Programmable OCL with low-side MOSFET RDS(on) sensing, OVP/UVP/UVLO and thermal shutdown protections are also available.

The TPS51216-EP is available in a 20-pin, 3 mm × 3 mm, WQFN package and is specified for junction temperature from -55°C to 125°C.

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Technical documentation

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Type Title Date
* Datasheet TPS51216-EP Complete DDR2, DDR3 and DDR3L Memory Power Solution Synchronous Buck Controller, 2-A LDO, Buffered Reference datasheet Nov. 19, 2015
VID TPS51216-EP VID V6216601 Mar. 27, 2018
Selection guides TI Components for Aerospace and Defense Guide (Rev. E) Mar. 22, 2017
Radiation & Reliability reports TPS51216MRUKREP Reliability Report Apr. 11, 2016
Technical articles A New Understanding: Blast Motion redefines movement, tracking and training for athletes. Aug. 06, 2014
Technical articles Improving Fly-Buck Regulation Using Opto (Part-1) Jul. 15, 2014
Technical articles Altium and WEBENCH – together at last Jul. 12, 2014
Technical articles Using telemetry in point-of-load applications Jun. 24, 2014

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Design tools & simulation

SLUM395.ZIP (67 KB) - PSpice Model
SLUM458.ZIP (72 KB) - TINA-TI Spice Model
SLUM459.TSC (648 KB) - TINA-TI Reference Design

Reference designs

3 - 4.2Vin, 1.35Vout @ 4A, DDR3 LV using the TPS51216
PMP6807 The PMP6807 reference design uses the TPS51216 to generate a low voltage DRR3 power supply. The VDDQ supply is 1.35V and capable of 4A. The VTT supply is generated using a source/sink LDO that is capable of 0.5A. The design also takes advantage of high performance compact MOSFETs (CSD17313Q2) to (...)

CAD/CAE symbols

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WQFN (RUK) 20 View options

Ordering & quality

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