Specifications
| Type | Description |
|---|---|
| Part Number | TPS51116_DDR-Power |
| Manufacturer | Texas Instruments |
| Product Type | Buck Converter |
| Category | Power Management |
| Package/Case | 20-pin HTSSOP PowerPAD (PWP) and 24-pin 4 x 4 QFN (RGE) |
| Datasheet Part Number | TPS51116 |
| Datasheet Source Manufacturer | Texas Instruments; supplied product info says LG |
| Device Description | Complete DDR, DDR2, DDR3, DDR3L, LPDDR3 and DDR4 power solution with synchronous buck controller, 3-A LDO, and buffered reference |
| Supported Memory Standards | DDR, DDR2, DDR3, DDR3L, LPDDR3, DDR4 |
| Buck Controller Input Voltage Range | 3.0 V to 28 V |
| VDDQ Output Voltage Options | 2.5 V, 1.8 V, adjustable to 1.5 V, 1.35 V, 1.2 V, or 0.75 V to 3.0 V output range |
| Switching Frequency | 400 kHz |
| Control Modes | D-CAP Mode or current mode |
| VTT LDO Current Capability | 3 A sink/source |
| VTT LDO Output Capacitance Requirement | 20 uF ceramic |
| VTTREF Output Current | 10 mA |
| VREF and VTT Accuracy | ±20 mV |
| Sleep State Support | VTT high-Z in S3; VDDQ, VTT, and VTTREF soft-off discharge in S4/S5 |
| Protection Features | Power good, overvoltage protection, undervoltage protection, thermal shutdown |
| PGOOD Function | Open-drain output; high when VDDQ output voltage is within target range |
| Recommended Supply Voltage | 4.75 V min, 5.25 V max |
| Recommended Operating Temperature | -40°C to 85°C |
| Storage Temperature | -55°C to 150°C |
| ESD Rating HBM | ±2000 V |
| ESD Rating CDM | ±1500 V |
| Absolute Maximum VBST Voltage | -0.3 V to 36 V |
| Absolute Maximum VBST with Respect to LL | -0.3 V to 6 V |
| Absolute Maximum DRVH Output Voltage | -1.0 V to 36 V |
| Absolute Maximum LL Output Voltage | -1.0 V to 30 V |
| Recommended VLDOIN/VTT/VTTSNS/VDDQSNS Voltage Range | -0.1 V to 3.6 V |
| Recommended VTTREF Voltage Range | -0.1 V to 1.8 V |
| Power Dissipation PWP | 2.53 W at TA < 25°C; 1.01 W at TA = 85°C; derating 25.3 mW/°C above 25°C |
| Power Dissipation RGE | 2.20 W at TA < 25°C; 0.88 W at TA = 85°C; derating 22.0 mW/°C above 25°C |
| Thermal Resistance Junction-to-Ambient | 41.2°C/W PWP; 35.3°C/W RGE |
| Thermal Resistance Junction-to-Case Bottom | 3.6°C/W PWP; 3.6°C/W RGE |
| V5IN Supply Current 1 | 0.8 mA typ, 2 mA max |
| V5IN Shutdown Current | 0.1 uA typ, 1.0 uA max |
| VTTREF Output Voltage | VDDQSNS / 2 |
| VTTREF Output Voltage Tolerance | ±20 mV at VDDQSNS=2.5 V; ±18 mV at 1.8 V; ±15 mV at 1.5 V; ±12 mV at 1.2 V |
| VTTREF Source Current | -20 mA min, -40 mA typ, -80 mA max |
| VTTREF Sink Current | 20 mA min, 40 mA typ, 80 mA max |
| VDDQ Fixed Output Voltage DDR | 2.465 V min, 2.500 V typ, 2.535 V max |
| VDDQ Fixed Output Voltage DDR2 | 1.776 V min, 1.800 V typ, 1.824 V max |
| VDDQ Adjustable Output Range | 0.75 V to 3.0 V |
| VDDQSET Regulation Voltage | 742.5 mV min, 750.0 mV typ, 757.5 mV max |
| VDDQ Discharge Current | 10 mA typ, 40 mA max |
| Datasheet Status | request_only |
Product Overview
TPS51116_DDR-Power is a Power_Management entry for a DDR power supply controller. The datasheet identifies the underlying part as TPS51116 and describes it as a complete power solution for DDR, DDR2, DDR3, DDR3L, LPDDR3, and DDR4 memory rails. Its structure combines a synchronous buck controller, a 3-A sink/source tracking LDO for VTT, and a buffered low-noise VTTREF output.
The buck controller supports a 3.0 V to 28 V input range and fixed 400 kHz pseudo-constant-frequency PWM operation. Control can use D-CAP mode for transient response or current mode for ceramic output capacitor support. VDDQ options include 2.5 V, 1.8 V, adjustable settings for 1.5 V, 1.35 V, 1.2 V, and a 0.75 V to 3.0 V adjustable range.
Assembly options include 20-pin HTSSOP PowerPAD (PWP) and 24-pin 4 x 4 QFN (RGE). The device specifies power-good, overvoltage, undervoltage, and thermal shutdown protection, with recommended operation from -40°C to 85°C.
Key Features
- Supports DDR, DDR2, DDR3, DDR3L, LPDDR3, and DDR4
- Synchronous buck controller input range is 3.0 V to 28 V
- Fixed 400 kHz pseudo-constant-frequency PWM operation
- D-CAP mode or current-mode control options
- Integrated 3 A sink/source VTT tracking LDO
- Buffered VTTREF output supports 10 mA operation
- VREF and VTT accuracy specified at ±20 mV
- S3, S4, and S5 sleep-state support
- Power-good, overvoltage, undervoltage, and thermal shutdown protection
- PWP and RGE package options with thermal metrics
Typical Applications
- DDR memory power rails
- DDR2 memory power rails
- DDR3 and DDR3L systems
- LPDDR3 memory supplies
- DDR4 VDDQ and VTT rails
- Systems requiring VTTREF buffering
- Power rails needing S3/S4/S5 control
Procurement Notes
When requesting a quote for TPS51116_DDR-Power, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For power IC and power device sourcing, voltage rating, current rating, power dissipation, package thermal performance, protection features, qualification grade and application conditions should be reviewed before approval.
FAQ
What memory standards does TPS51116_DDR-Power support?
The extracted datasheet facts list support for DDR, DDR2, DDR3, DDR3L, LPDDR3, and DDR4 memory standards. The device is described as a complete power solution for these memory rail requirements.
What package options are listed for this controller?
The package_case fact lists two options: 20-pin HTSSOP PowerPAD, identified as PWP, and 24-pin 4 x 4 QFN, identified as RGE. Thermal and dissipation data are provided for both packages.
What is the buck controller input voltage range?
The synchronous buck controller input voltage range is specified as 3.0 V to 28 V. This value comes directly from the feature information extracted from page 1 of the manufacturer technical datasheet.
What protection functions are included?
The extracted protection features are power good, overvoltage protection, undervoltage protection, and thermal shutdown. The PGOOD output is open-drain and goes high when VDDQ is within its target range.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.