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Texas Instruments TPS53318DQPR
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- Part No.:
- TPS53318DQPR
- Manufacturer:
- Texas Instruments
- Package:
- 22-PowerLFDFN
- Datasheet:
-
TPS53318DQPR.pdf
- Description:
- IC REG BUCK ADJ 8A 22LSON-CLIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,563
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Product details
Overview
TPS53318DQPR from Texas Instruments is a high-efficiency, 8A synchronous buck converter with integrated NexFET™ power MOSFETs, D-CAP™ control architecture, and Eco-mode for light-load efficiency. It operates from 1.5V–22V input, delivers 0.6V–5.5V output, and achieves 91% efficiency at 12V→1.5V/14A (TPS53319) - confirmed for TPS53318 at 8A load in server point-of-load applications.
For engineers reviewing the TPS53318DQPR datasheet, TPS53318DQPR pinout, TPS53318DQPR application, or TPS53318DQPR equivalent, key selection criteria include its adaptive on-time D-CAP™ control for ultra-fast transient response, selectable 250kHz–1MHz switching frequency via external resistor, integrated 5V LDO (VREG), and thermal-compensated overcurrent protection with TRIP pin.
Technical Context
The TPS53318DQPR implements D-CAP™ mode control using output capacitor ESR for current sensing-eliminating need for external compensation components. Its adaptive on-time algorithm dynamically adjusts tON ∝ VOUT/VIN, maintaining stable pseudo-constant frequency across wide VIN/VOUT ranges while enabling sub-100ns minimum on-time (35ns typical).
It supports dual operating modes: forced continuous conduction mode (FCCM) and auto-skip Eco-mode, selected via MODE pin. Soft-start time (0.7ms–5.6ms) and switching frequency (eight discrete values) are both resistor-programmable-RF pin to GND/VREG sets fSW, MODE pin resistor sets tSS-with internal storage of configuration during startup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 8 A continuous - enables single-chip 1.2V/8A CPU core rail without external MOSFETs or heatsink |
| Input Voltage Range | 1.5 V to 22 V - supports direct connection to 3.3V, 5V, 12V, or 19V intermediate bus rails |
| Output Voltage Range | 0.6 V to 5.5 V - covers DDR memory, FPGA I/O, GPU cores, and ASIC logic supplies |
| Switching Frequency | 250 kHz to 1 MHz - selectable via RF pin resistor; higher frequencies reduce output filter size |
| Reference Accuracy | ±0.5% over –40°C to 85°C - ensures tight regulation for low-voltage digital loads (e.g., 1.0V ±10mV) |
| Shutdown Current | <110 µA - meets system-level deep-sleep power budget requirements in servers and workstations |
| Thermal Protection | 145°C shutdown with 10°C hysteresis - prevents damage during sustained overload or airflow loss |
Pinout & Package
TPS53318DQPR uses a 22-pin QFN (DQP/LSON-CLIP) package, 6.0 mm × 5.0 mm, with exposed PowerPAD™ thermal pad for enhanced heat dissipation. The package is rated for operation from –40°C to 85°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VFB | Feedback input | Connects to resistor divider on output rail; regulates voltage to precise 0.6V internal reference |
| EN | Enable control | Logic-high >1.3V enables converter; <1.0V disables with <122µA shutdown current |
| PGOOD | Open-drain status flag | Asserts after 1-ms delay when VFB is within ±5% of target; signals valid power rail to host controller |
| VBST | Bootstrap supply | Connects external capacitor to LL node; powers high-side gate driver for efficient 100% duty-cycle capability |
| TRIP | OCP threshold setting | Sources 10µA with 3000 ppm/°C tempco; sets valley current limit (e.g., 5.4A typ at 25°C with 66.5kΩ) |
| MODE | Mode & soft-start select | Resistor sets FCCM/skip mode AND soft-start time (0.7/1.4/2.8/5.6 ms) - stored internally at startup |
| RF | Frequency select | Resistor to GND/VREG selects one of eight switching frequencies (250kHz–1MHz); open = 500kHz |
| VREG | 5V LDO output | Supplies internal analog circuitry and gate drivers; delivers up to 30mA with 250mV dropout at 30mA |
| VIN | Main power input | Eight parallel pins accept high-current input (1.5V–22V); minimizes PCB trace resistance and IR drop |
| GND / PowerPad | Ground & thermal path | Exposed thermal pad must be connected to solid ground plane with ≥9 vias for RθJB = 5.9°C/W |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP™ control with ESR sensing | Eliminates external compensation network - reduces BOM count and layout sensitivity to capacitor ESR variation |
| Auto-skip Eco-mode | Extends light-load efficiency by disabling switching cycles below ~100mA, reducing quiescent current to <110µA |
| Integrated 5V LDO (VREG) | Self-powered gate drive and bias supply - removes need for external 5V rail and simplifies system power sequencing |
| Pre-charged start-up | Allows safe startup into pre-biased output rails - prevents reverse current flow into powered downstream circuits |
| Redundant OVP (ROVP) | Independent overvoltage protection path using external resistor divider - adds fault tolerance beyond internal VFB comparator |
| All-ceramic capacitor support | Stable operation with low-ESR MLCCs only - enables compact, high-reliability output filtering without electrolytics |
Applications
| Server Point-of-Load | Workstation CPU Core Supply |
|---|---|
Use Scenario: Delivering 1.2V/8A to dual-socket Xeon processors in 1U rack servers with strict airflow constraints. IC Role / Device Role / Timing Role: Primary synchronous buck regulator with D-CAP™ control for sub-100ns transient response to CPU load steps. Use Value: 91% peak efficiency at full load reduces thermal load on heatsink; Eco-mode cuts idle power by >40% vs. FCCM. |
Use Scenario: Powering high-performance Intel Core i9 or AMD Ryzen Threadripper CPUs on desktop workstations. IC Role / Device Role / Timing Role: Single-chip 8A buck converter managing dynamic VDDCORE scaling with adaptive on-time control. Use Value: Integrated MOSFETs and LDO eliminate 6 external components; 0.7ms soft-start prevents inrush into multi-phase VRMs. |
| Telecom Baseband Processing | AI Accelerator Board Supply |
Use Scenario: Generating 0.85V/6A for FPGA-based baseband processing units in 5G macrocell radios. IC Role / Device Role / Timing Role: High-efficiency POL regulator supporting rapid DVFS transitions during burst traffic. Use Value: 250kHz–1MHz frequency selection allows optimization for EMI compliance in dense RF environments. |
Use Scenario: Providing 1.0V/8A to edge AI inference accelerators (e.g., Google Edge TPU, NVIDIA Jetson modules). IC Role / Device Role / Timing Role: Compact, thermally robust buck stage with pre-biased start-up for hot-pluggable modules. Use Value: PowerPAD™ thermal design sustains 8A continuous load at 85°C ambient; ROVP adds safety margin for unattended operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS53319DQPR | 14A output rating, identical pinout and feature set - shares same DQP package and register map | Required for >8A loads (e.g., high-core-count CPUs); higher OCP threshold and thermal derating | Select when design requires >8A continuous current; no PCB change needed but verify thermal margin |
| TPS548A28RGER | Newer 15A device with remote sense, 16V max VIN, smaller 4mm × 4mm QFN, and lead-free-only packaging | Targeted at data center ASICs requiring tighter voltage accuracy (<±0.5%) and remote sensing for board-level IR drop compensation | Choose for next-gen designs needing higher current density and remote sense; not pin-compatible with TPS53318DQPR |
Compared with TPS53318DQPR, TPS53319DQPR offers +6A headroom in the same footprint for future-proofing, while TPS548A28RGER provides superior accuracy and sensing but requires layout revision and supports only ≤16V input.
Availability
TPS53318DQPR is available at Aetrix Electronics and suitable for server power delivery, workstation CPU core supplies, and telecom infrastructure applications requiring stable component supply, long-term lifecycle assurance, and TI-authorized traceability.
Supply support for TPS53318DQPR 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 ICs, with decades of expertise in high-efficiency DC-DC conversion.
The TPS5331x family was designed specifically for space-constrained, high-current point-of-load applications in computing systems-emphasizing fast transient response, minimal external components, and robust protection for mission-critical digital loads.
FAQ
What is the maximum continuous output current supported by the TPS53318DQPR?
The TPS53318DQPR supports 8 A continuous output current under recommended operating conditions (–40°C to 85°C, proper PCB thermal design). This is validated per TI's SLUSAY8G datasheet Section 4 (Device Comparison Table) and confirmed in Figure 6-24 through 6-29 efficiency curves for TPS53318. Exceeding 8 A requires derating or switching to TPS53319DQPR.
Does the TPS53318DQPR require an external compensation network?
No, the TPS53318DQPR does not require external compensation. Its D-CAP™ control architecture uses the output capacitor's ESR to sense inductor current, eliminating the need for type-II or type-III compensation networks. This is explicitly stated in Section 7.1 and Figure 7-2 of the SLUSAY8G datasheet, enabling simpler, more robust designs with all-ceramic output capacitors.
How is switching frequency selected on the TPS53318DQPR?
Switching frequency on the TPS53318DQPR is selected by connecting a resistor between the RF pin and either GND or VREG. Eight discrete frequencies from 250 kHz to 1 MHz are supported, as defined in Table 7-1 of the SLUSAY8G datasheet. An open RF pin defaults to 500 kHz. The value is detected and stored during startup, making it non-volatile across enable cycles.
Can the TPS53318DQPR start up into a pre-biased output voltage?
Yes, the TPS53318DQPR supports pre-charged start-up, allowing safe operation when the output rail is already biased before enable. This prevents reverse current flow into downstream circuits and is implemented via internal circuitry that monitors LL node voltage during startup - detailed in Section 7.3.10 of the SLUSAY8G datasheet.
What protection features are integrated into the TPS53318DQPR?
The TPS53318DQPR integrates overvoltage (OVP), undervoltage (UVP), overtemperature (OTP), and overcurrent (OCP) protection. OVP/UVP thresholds are programmable via ROVP pin and internal comparators (115–125% OVP, 65–75% UVP); OTP triggers at 145°C with 10°C hysteresis; OCP is adjustable via TRIP pin with thermal compensation - all verified in Section 6.5 of SLUSAY8G.
TPS53318DQPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP™, Eco-Mode™
- Package/Case:
- 22-PowerLFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.5V
- Voltage - Input (Max):
- 22V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 8A
- Frequency - Switching:
- 250kHz ~ 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 22-LSON-CLIP (6x5)
TPS53318DQPR FAQ
1.How can I place an order for TPS53318DQPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS53318DQPR 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 TPS53318DQPR reliable?
The price and inventory of TPS53318DQPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS53318DQPR is usually 5 days.
3.What payment methods are accepted for TPS53318DQPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS53318DQPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS53318DQPR?
TPS53318DQPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS53318DQPR 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 TPS53318DQPR?
For technical support, including TPS53318DQPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS53318DQPR requirements.
6.How does Aetrix verify that TPS53318DQPR is sourced from the original manufacturer or authorized distributors?
All TPS53318DQPR 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 TPS53318DQPR meets industry standards.
7.What is the process for return or replacement of TPS53318DQPR?
All TPS53318DQPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS53318DQPR, 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 TPS53318DQPR part is unused and in its original packaging.
Return procedure for TPS53318DQPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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