Specifications
| Type | Description |
|---|---|
| Part Number | TPS51916 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Package / Case | 20-pin QFN (RUK), 3 mm x 3 mm body |
| Component Type | Power_IC |
| Input Conversion Voltage Range | 3 to 28 V; Synchronous buck controller VDDQ |
| Output Voltage Range | 0.7 to 1.8 V; Synchronous buck controller VDDQ |
| VDDQ Accuracy | 0.8%; VDDQ regulator |
| Switching Frequencies | 300, 400, 500, or 670 kHz; Selectable by MODE pin resistor |
| VTT Peak Sink Current | 2 A; LDO output |
| VTT Peak Source Current | 2 A; LDO output |
| VTTREF Output Current | 10 mA; Buffered low-noise VTTREF output |
| VTTREF Accuracy | 0.8%; Tracks VDDQ/2 |
| VTT Accuracy | 20 mV; Relative to VTTREF |
| Minimum VTT Output Capacitance | 10 uF; Ceramic capacitance required for VTT |
| VTTREF Minimum Output Capacitance | 0.22 uF or larger; Required for stability |
| VREF Output Voltage | 1.8 V; Reference output pin |
| V5IN Recommended Supply Voltage | 4.5 to 5.5 V; Recommended operating conditions |
| Recommended Ambient Temperature | -40 to 85 °C; Operating free-air temperature range |
| Absolute Maximum Junction Temperature | 125 °C; Absolute maximum ratings |
| Storage Temperature | -55 to 150 °C; Absolute maximum ratings |
| HBM ESD Rating | ±2000 V; ANSI/ESDA/JEDEC JS-001 |
| CDM ESD Rating | ±1500 V; JEDEC JESD22-C101 |
| Junction-to-Ambient Thermal Resistance | 94.1 °C/W; RUK QFN, 20 pins |
| Junction-to-Case Bottom Thermal Resistance | 5.9 °C/W; RUK QFN, 20 pins |
| V5IN Supply Current in S0 | 590 uA typ; TA=25°C, no load, VS3=VS5=5 V |
| V5IN Supply Current in S3 | 500 uA typ; TA=25°C, no load, VS3=0 V, VS5=5 V |
| V5IN Shutdown Current | 1 uA typ; TA=25°C, no load, VS3=VS5=0 V |
| VLDOIN Supply Current in S0 | 5 uA typ; TA=25°C, no load, VS3=VS5=5 V |
| VLDOIN Supply Current in S3 | 5 uA typ; TA=25°C, no load, VS3=0 V, VS5=5 V |
| VREF Output Voltage Accuracy | 1.7856 to 1.8144 V; 0 uA <= IVREF < 300 uA, TA=-10°C to 85°C |
| VREF Current Limit | 0.4 to 0.8 mA; VVREF=1.7 V |
| VTTREF Output Ratio | 49.2% to 50.8% of VVDDQSNS; |IVTTREF| < 100 uA, 1.2 V <= VVDDQSNS <= 1.8 V |
| VTTREF Output Tolerance | 49% to 51% of VVDDQ; |IVTTREF| < 10 mA, 1.2 V <= VVDDQSNS <= 1.8 V |
| VTTREF Source Current Limit | 10 to 18 mA; VVDDQSNS=1.8 V, VVTTREF=0 V |
| VTTREF Sink Current Limit | 10 to 17 mA; VVDDQSNS=1.8 V, VVTTREF=1.8 V |
| VTT Output Tolerance | -20 to 20 mV; |IVTT| <= 10 mA, 1.2 V <= VVDDQSNS <= 1.8 V, IVTTREF=0 A |
| VTT Source Current Limit | 2 to 3 A; VVDDQSNS=1.8 V, VVTT=VVTTSNS=0.7 V, IVTTREF=0 A |
| VTT Sink Current Limit | 2 to 3 A; VVDDQSNS=1.8 V, VVTT=VVTTSNS=1.1 V, IVTTREF=0 A |
| VDDQSNS Regulation Tolerance | -3 to 3 mV; TA=25°C, tolerance to REFIN |
| VDDQ Switching Frequency | 300 kHz; VIN=12 V, VVDDQSNS=1.8 V, RMODE=100 kOhm |
| VDDQ Switching Frequency | 400 kHz; VIN=12 V, VVDDQSNS=1.8 V, RMODE=200 kOhm |
| VDDQ Switching Frequency | 500 kHz; VIN=12 V, VVDDQSNS=1.8 V, RMODE=1 kOhm |
| VDDQ Switching Frequency | 670 kHz; VIN=12 V, VVDDQSNS=1.8 V, RMODE=12 kOhm |
| Minimum On-Time | 60 ns typ; DRVH rising to falling |
| Minimum Off-Time | 200 ns min, 320 ns typ, 450 ns max; DRVH falling to rising |
| MODE Source Current | 14 mA min, 15 mA typ, 16 mA max; MODE pin |
| Datasheet Status | request_only |
Product Overview
TPS51916 is a Texas Instruments DDR memory power solution categorized under Power_Management. The device combines a synchronous buck controller for the VDDQ rail with VTT and VTTREF support functions used around DDR memory power rails. The VDDQ controller accepts a 3 to 28 V input conversion range and regulates outputs from 0.7 to 1.8 V with 0.8% VDDQ regulator accuracy.
Frequency configuration is selectable using the MODE pin resistor, with supported switching frequencies of 300, 400, 500, and 670 kHz. The VTT LDO output supports 2 A peak source current and 2 A peak sink current, while VTT tracking accuracy is specified within 20 mV relative to VTTREF. VTT requires at least 10 uF ceramic output capacitance.
The part is supplied in a 20-pin QFN (RUK) package with a 3 mm x 3 mm body. Recommended operating conditions include a V5IN supply range of 4.5 to 5.5 V and a -40 to 85 °C operating free-air temperature range. Thermal data includes 94.1 °C/W junction-to-ambient resistance and 5.9 °C/W junction-to-case bottom resistance for the RUK QFN package.
Key Features
- 3 to 28 V VDDQ input conversion range
- 0.7 to 1.8 V VDDQ output range
- 0.8% VDDQ regulator accuracy
- Selectable 300, 400, 500, or 670 kHz switching
- VTT LDO sources and sinks 2 A peak
- Buffered low-noise VTTREF output supports 10 mA
- VTTREF tracks VDDQ/2 with 0.8% accuracy
- VTT tolerance is 20 mV relative to VTTREF
- VREF reference output is 1.8 V
- 20-pin 3 mm x 3 mm RUK QFN package
Typical Applications
- DDR memory VDDQ regulation
- DDR VTT termination rails
- VTTREF reference generation
- 1.8 V reference output circuits
- Synchronous buck DDR power rails
- Systems requiring S0 and S3 supply states
Procurement Notes
When requesting a quote for TPS51916, 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 type of power device is TPS51916?
TPS51916 is a Texas Instruments DDR memory power solution in the Power_Management category. The extracted datasheet facts identify it as a Power_IC with a VDDQ synchronous buck controller, VTT LDO output, VTTREF output, and VREF reference output.
What VDDQ input and output ranges does TPS51916 support?
For the synchronous buck controller VDDQ rail, TPS51916 supports a 3 to 28 V input conversion voltage range and a 0.7 to 1.8 V output voltage range. VDDQ regulator accuracy is listed as 0.8%.
What switching frequencies are available for the VDDQ controller?
The datasheet facts list selectable VDDQ switching frequencies of 300, 400, 500, and 670 kHz. Frequency selection is controlled by the MODE pin resistor, with specific RMODE values listed for each frequency condition.
What current capability is specified for the VTT output?
The VTT LDO output supports 2 A peak source current and 2 A peak sink current. Electrical characteristics also list VTT source and sink current limits from 2 to 3 A under the specified VVDDQSNS, VVTT, and VVTTSNS conditions.
What package is used for TPS51916?
TPS51916 is provided in a 20-pin QFN package, identified as the RUK package, with a 3 mm x 3 mm body. Thermal facts for this package include 94.1 °C/W junction-to-ambient resistance and 5.9 °C/W junction-to-case bottom resistance.
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.