My Inquiry
My Account
Texas Instruments TPS51116PWPG4
- Part No.:
- TPS51116PWPG4
- Manufacturer:
- Texas Instruments
- Category:
- Special Purpose Regulators
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS51116PWPG4.pdf
- Description:
- IC REG CTRLR DDR 1OUT 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,202
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS51116PWPG4 from Texas Instruments is a complete DDR/DDR2/DDR3/DDR3L/LPDDR3/DDR4 memory power solution integrating a synchronous buck controller (VDDQ), 3-A sink/source LDO (VTT), and buffered 10-mA reference (VREF). It delivers 2.5 V / 10 A for DDR, 1.8 V / 10 A for DDR2, and adjustable 0.75–3.0 V outputs with ±20 mV accuracy on both VTT and VREF. Designed for high-density server and embedded memory subsystems requiring fast transient response and S3/S4/S5 state control.
For engineers reviewing the TPS51116PWPG4 datasheet, TPS51116PWPG4 pinout, TPS51116PWPG4 application, or TPS51116PWPG4 equivalent, key selection criteria include D-CAP™ vs current-mode operation support, VDDQ/VTT tracking behavior, soft-off discharge capability in S4/S5 states, thermal shutdown threshold (160°C), and compatibility with ceramic output capacitors (2 × 10 µF for VTT).
Technical Context
The TPS51116PWPG4 implements adaptive on-time D-CAP™ control for sub-100-ns load-step response and supports configurable current-mode operation for ceramic-capacitor stability. Its dual-path architecture separates VDDQ regulation (400-kHz fixed-frequency PWM) from VTT regulation (linear LDO with external VLDOIN supply path), enabling independent efficiency optimization.
VTT regulation uses VTTSNS feedback with ±40 mV tolerance at full ±3 A sink/source, while VDDQSNS serves as reference for both VTT and VTTREF. Sleep-state logic (S3/S5 pins) controls high-Z mode, non-tracking discharge, and soft-off sequencing - critical for JEDEC-compliant DDR termination power management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDDQ Output Range | 0.75–3.0 V adjustable; factory-set 2.5 V (DDR) or 1.8 V (DDR2) with ±20 mV tolerance at 25°C |
| VTT Output Capability | Sink/source up to 3 A with ±40 mV tolerance at ±3 A; requires only 20-μF ceramic output capacitance |
| VTTREF Accuracy | ±20 mV over temperature and load; buffered low-noise 10-mA output referenced to VDDQSNS/2 |
| Control Modes | D-CAP™ mode (100-ns load step response) or current-mode option; COMP pin configures mode selection |
| Thermal Protection | Thermal shutdown at 160°C with 10°C hysteresis; junction-to-board RθJB = 23.9°C/W (PWP package) |
| Sleep-State Support | S3 input enables high-Z VTT; S5 input triggers soft-off discharge of VDDQ, VTT, and VTTREF in S4/S5 states |
| Input Voltage Range | V5IN: 4.75–5.25 V; VIN (buck stage): 3.0–28 V; supports wide-input industrial and server rails |
Pinout & Package
TPS51116PWPG4 is housed in a 20-pin HTSSOP PowerPAD™ package (PWP) with exposed thermal pad. Pin numbering follows top-view layout; GND and PGND are separate signal and power grounds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VLDOIN (Pin 1) | VTT LDO input supply | External connection point to optimize VTT efficiency; typically tied to VDDQ output or dedicated rail |
| VTT (Pin 2) | VTT LDO output | Power output for DDR termination; capable of sourcing/sinking 3 A with tracking to VDDQ |
| VTTGND (Pin 3) | VTT LDO ground return | Dedicated power ground for VTT LDO; must connect to negative terminal of VTT output capacitor |
| VTTSNS (Pin 4) | VTT voltage sense input | Connects to positive terminal of VTT output capacitor for accurate closed-loop regulation |
| GND (Pin 5) | Signal ground reference | Reference for internal circuits and comparator inputs; separate from PGND and VTTGND |
| MODE (Pin 6) | Discharge mode control | Selects between tracking (VDDQ/VTT follow same ramp) and non-tracking discharge during S4/S5 |
| VTTREF (Pin 7) | Buffered reference output | Low-noise 10-mA VREF output; accuracy ±20 mV; used for SSTL/HSTL termination biasing |
| COMP (Pin 8) | Transconductance amplifier output | Phase compensation node; tie to V5IN to disable gM amp and enable D-CAP™ mode |
| VDDQSNS (Pin 9) | VDDQ reference input | Provides reference for VTT and VTTREF; also serves as VDDQ feedback when VDDQSET is grounded |
| VDDQSET (Pin 10) | VDDQ output voltage setting | Resistor-divider input to set VDDQ; 0 V = 2.5 V, 5 V = 1.8 V, or adjustable via external divider |
| S3 (Pin 11) | Suspend-to-RAM control | Active-low input; places VTT in high-Z state during S3 sleep mode |
| S5 (Pin 12) | Suspend-to-disk control | Active-low input; initiates soft-off discharge of VDDQ, VTT, and VTTREF in S4/S5 states |
| PGOOD (Pin 13) | Power-good open-drain output | Asserts high when VDDQ is within ±5% of target; 2.5–7.5 mA sink capability |
| V5IN (Pin 14) | 5-V internal circuit supply | Primary supply for gate drivers and internal logic; 4.75–5.25 V operating range |
| CS (Pin 15) | Current sense comparator input | Accepts RDS(on) or resistor-based current sensing; sets overcurrent trip threshold |
| PGND (Pin 16) | Power ground for low-side driver | Ground return for DRVL; also serves as current sense comparator (+) and PGOOD ground |
| DRVL (Pin 17) | Low-side MOSFET gate driver | Drives synchronous rectifier; 0.9–3 Ω sink/source resistance at 100 mA |
| LL (Pin 18) | High-side driver return / CS(–) | Return path for DRVH; doubles as current sense comparator negative input in RDS(on) mode |
| DRVH (Pin 19) | High-side MOSFET gate driver | Drives main switch; 0.9–3 Ω sink/source resistance at 100 mA; supports bootstrap operation |
| VBST (Pin 20) | Bootstrap capacitor input | Supplies floating gate drive for high-side FET; forward diode drop ≤0.9 V at 10 mA |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP™ adaptive on-time control | Enables 100-ns load-step response without external compensation; simplifies design for DDR memory rails |
| VTT sink/source LDO with VLDOIN input | Reduces total system power loss by allowing VTT to be powered from optimized rail instead of VDDQ |
| Integrated VTTREF buffered reference | Eliminates need for external reference IC; provides stable, low-noise 10-mA bias for SSTL/HSTL interfaces |
| S3/S4/S5 state support | Hardware-controlled sleep sequencing meets JEDEC DDR power-state requirements without firmware intervention |
| Overvoltage/undervoltage protection | VDDQ OVP at 115% +5% hysteresis; UVP at 70% +10% hysteresis; protects memory devices during fault conditions |
| Thermal shutdown with hysteresis | Shuts down at 160°C and re-enables at 150°C; prevents latch-up and ensures safe recovery under overload |
Applications
| DDR Memory Power Supply | SSTL-18 Termination |
|---|---|
Use Scenario: Powering DDR2 memory modules in network switches and industrial controllers. IC Role / Device Role / Timing Role: Provides regulated 1.8-V VDDQ and matched 0.9-V VTT with ±20 mV accuracy and synchronized soft-start. Use Value: Ensures signal integrity across 400-MHz DDR2 buses by maintaining tight VTT tracking to VDDQ/2 and minimizing termination noise. | Use Scenario: Biasing SSTL-18 I/O interfaces in FPGA-based test equipment. IC Role / Device Role / Timing Role: Delivers precise 0.9-V VTT and buffered VTTREF to meet JEDEC SSTL-18 DC specifications. Use Value: Guarantees <±20 mV VTT tolerance at full ±2 A load, preventing data eye closure and timing violations. |
| DDR3L Memory Subsystem | LPDDR3 Mobile Baseband |
Use Scenario: Powering DDR3L memory in telecom base station boards where low-voltage operation reduces power consumption. IC Role / Device Role / Timing Role: Generates 1.35-V VDDQ and corresponding 0.675-V VTT using adjustable VDDQSET and VTTSNS feedback. Use Value: Achieves ±40 mV VTT regulation at ±2 A load, supporting JEDEC LPDDR3 VTT tolerance requirements. | Use Scenario: Supplying LPDDR3 memory in portable medical imaging devices requiring ultra-low standby current. IC Role / Device Role / Timing Role: Enters high-Z VTT mode in S3 and performs controlled soft-off discharge in S4/S5 via S3/S5 pin control. Use Value: Reduces system standby power by >90% versus always-on termination, extending battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DDR memory power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS51116RGET | 24-pin QFN (RGE) package; includes V5FILT pin for filtered 5-V supply; identical electrical specs and pin functions except NC and CS_GND placement | Preferred for space-constrained layouts needing lower thermal resistance (RθJB = 12.9°C/W vs 23.9°C/W) | Select RGE for improved thermal performance and board-level filtering; PWP remains optimal for cost-sensitive through-hole assembly. |
| TPS51216RGET | Enhanced version with integrated MOSFET drivers supporting higher VDDQ current (up to 25 A); adds PMBus interface and telemetry; not pin-compatible | Required for DDR4-2400+ systems demanding dynamic margining and real-time voltage monitoring | Choose TPS51216 for DDR4 servers with telemetry needs; TPS51116PWPG4 suffices for DDR3/DDR3L with fixed 10-A VDDQ. |
Compared with TPS51116RGET and TPS51216RGET, the TPS51116PWPG4 offers lowest BOM cost and proven reliability in DDR2/DDR3L designs, while lacking PMBus telemetry and having higher thermal resistance than the QFN variant - making it ideal for cost-optimized, thermally manageable memory power rails.
Availability
TPS51116PWPG4 is available at Aetrix Electronics and suitable for DDR2/DDR3/DDR3L memory power supplies, SSTL-18 termination circuits, and LPDDR3 mobile baseband designs requiring stable component supply and long-term industrial availability.
Supply support for TPS51116PWPG4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies with over 90 years of innovation history.
The TPS51116 product line delivers integrated DDR memory power solutions targeting high-reliability computing, networking, and industrial systems where compact size, JEDEC compliance, and multi-standard support are essential.
FAQ
What is the maximum supported DDR standard for TPS51116PWPG4?
The TPS51116PWPG4 supports DDR, DDR2, DDR3, DDR3L, LPDDR3, and DDR4 memory systems. It achieves this through programmable VDDQ output (0.75–3.0 V) and corresponding VTT scaling (e.g., 1.25 V for DDR4), verified per JEDEC specifications in TI's SLUS609J datasheet revision J.
Does TPS51116PWPG4 require external compensation components?
No, the TPS51116PWPG4 operates in D-CAP™ mode by default and does not require external compensation. Connecting the COMP pin to V5IN disables the transconductance amplifier, enabling adaptive on-time control that eliminates loop compensation components and simplifies layout.
How does TPS51116PWPG4 handle VTT discharge during system suspend?
The TPS51116PWPG4 uses dedicated S3 and S5 pins to control VTT discharge: S3 asserts high-Z mode for suspend-to-RAM, while S5 triggers soft-off discharge of VTT, VDDQ, and VTTREF in suspend-to-disk states - all implemented in hardware without software dependency.
What is the minimum output capacitance required for the VTT LDO in TPS51116PWPG4?
The TPS51116PWPG4 requires only 20-μF total ceramic output capacitance for the VTT LDO - typically implemented as two 10-μF X5R/X7R MLCCs - enabling compact, high-reliability designs without bulk electrolytic capacitors.
Can TPS51116PWPG4 operate in current-mode control instead of D-CAP™ mode?
Yes, the TPS51116PWPG4 supports current-mode operation for improved stability with ceramic output capacitors. This is enabled by configuring the CS pin for resistor-based current sensing and leaving COMP unconnected to V5IN, allowing full control over compensation network design.
TPS51116PWPG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Applications:
- Controller, DDR
- Voltage - Input:
- 3V ~ 28V
- Number of Outputs:
- 1
- Voltage - Output:
- 1.2V, 1.35V, 1.5V, 1.8V, 2.5V, Adj
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-HTSSOP
TPS51116PWPG4 FAQ
1.How can I place an order for TPS51116PWPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS51116PWPG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS51116PWPG4 reliable?
The price and inventory of TPS51116PWPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS51116PWPG4 is usually 5 days.
3.What payment methods are accepted for TPS51116PWPG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS51116PWPG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS51116PWPG4?
TPS51116PWPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS51116PWPG4 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS51116PWPG4?
For technical support, including TPS51116PWPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS51116PWPG4 requirements.
6.How does Aetrix verify that TPS51116PWPG4 is sourced from the original manufacturer or authorized distributors?
All TPS51116PWPG4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS51116PWPG4 meets industry standards.
7.What is the process for return or replacement of TPS51116PWPG4?
All TPS51116PWPG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS51116PWPG4, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS51116PWPG4 part is unused and in its original packaging.
Return procedure for TPS51116PWPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS51116PWPG4 Tags
-
TPS51206DSQR
Texas Instruments
-
TPS51200DRCR
Texas Instruments
-
TPS51200DRCT
Texas Instruments
-
TPS62740DSSR
Texas Instruments
-
TPS51100DGQR
Texas Instruments
-
NCP51200MNTXG
onsemi
-
NCP51400MNTXG
onsemi
-
RT9026GSP
Richtek USA Inc.
-
LP2998MRX/NOPB
Texas Instruments
-
TPS51200QDRCRQ1
Texas Instruments
-
DPA423GN-TL
Power Integrations
-
LM10011SD/NOPB
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
