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Texas Instruments TPS53318DQPT
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- Part No.:
- TPS53318DQPT
- Manufacturer:
- Texas Instruments
- Package:
- 22-PowerLFDFN
- Datasheet:
-
TPS53318DQPT.pdf
- Description:
- IC REG BUCK ADJ 8A 22LSON-CLIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,384
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Product details
Overview
TPS53318DQPT from Texas Instruments is an 8A synchronous buck converter IC with integrated NexFET™ 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, achieves 91% efficiency at 12V→1.5V/14A (derated to 8A), and supports all-ceramic output capacitors in server point-of-load power delivery.
For engineers reviewing the TPS53318DQPT datasheet, TPS53318DQPT pinout, TPS53318DQPT application, or TPS53318DQPT 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 adjustable trip threshold.
Technical Context
The TPS53318DQPT implements D-CAP™ mode control using output capacitor ESR for current sensing-eliminating need for external compensation components. Its adaptive on-time architecture dynamically adjusts tON ∝ VOUT/VIN, maintaining stable pseudo-constant frequency across wide VIN/VOUT ranges while enabling sub-100ns minimum on-time for high step-down ratios.
It integrates a 5V LDO (VREG) powered from VDD ≥2V (independent of EN), supplies internal analog/driver circuitry, and enables bootstrap gate drive via VBST. Protection includes redundant OVP (ROVP pin), programmable valley OCP (TRIP pin), thermal shutdown at 145°C, and open-drain PGOOD with 1ms startup delay and 2µs fault response.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 8A continuous-supports compact point-of-load designs without external MOSFETs or heatsinks in space-constrained computing applications. |
| Input Voltage Range | 1.5V to 22V conversion input-enables direct use with 3.3V, 5V, 12V, or 19V intermediate bus rails without pre-regulation. |
| Output Voltage Range | 0.6V to 5.5V-covers core voltages for CPUs, FPGAs, ASICs, and memory subsystems with ±1% reference accuracy. |
| Switching Frequency | 250kHz to 1MHz, selectable via RF pin resistor-balances efficiency (lower fSW) vs. size (higher fSW) without loop compensation redesign. |
| Efficiency | 91% at 12V→1.5V/14A (TPS53319); TPS53318 achieves ≥89% at same condition-minimizes thermal load in dense server PCB layouts. |
| Shutdown Current | <110µA-enables low-power standby states in always-on infrastructure equipment without auxiliary LDOs. |
| Soft-Start Time | 0.7ms / 1.4ms / 2.8ms / 5.6ms, set by MODE pin resistor-prevents inrush current during hot-plug or multi-rail sequencing. |
Pinout & Package
TPS53318DQPT uses a 22-pin QFN (DQP/LSON-CLIP) package measuring 6.0mm × 5.0mm with exposed PowerPAD™ thermal pad. The package is RoHS-compliant and rated for –40°C to 85°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VFB | Feedback input | Connects to output voltage divider; regulates output to precise 0.6V reference (±1%) without external compensation. |
| EN | Enable control | Logic-level input (1.3V turn-on threshold); allows system-level power sequencing and standby mode control. |
| PGOOD | Open-drain status flag | Signals valid regulation after 1ms delay; drives host processor reset or power-good monitoring with 15–60Ω on-resistance. |
| VBST | Bootstrap supply | Connects boost capacitor to LL node; powers high-side gate driver for efficient synchronous rectification. |
| TRIP | OCP threshold setting | Sources 10µA (3000 ppm/°C) to set valley current limit; enables thermal-aware overcurrent protection scaling. |
| MODE | Soft-start & mode select | Resistor-programmable: selects auto-skip/FCCM operation and soft-start duration (0.7–5.6ms). |
| RF | Frequency selection | Resistor-to-GND/VREG sets one of eight discrete switching frequencies (250kHz–1MHz) without oscillator calibration. |
| ROVP | Redundant OVP input | Resistor-divider input for secondary overvoltage protection; prevents false trips by internal 1.5MΩ pull-down. |
| VIN (×6) | Main power input | Multiple parallel pins reduce IR drop and improve thermal distribution for high-current 1.5V–22V conversion path. |
| GND / PowerPad | Ground & thermal interface | Exposed thermal pad requires ≥9 vias to inner ground plane for RθJB = 5.9°C/W junction-to-board dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP™ control mode | ESR-based current sensing eliminates external compensation network-reduces BOM count and layout sensitivity to capacitor aging. |
| Auto-skip Eco-mode | Discontinuous conduction at light loads reduces quiescent current to <110µA-extends battery life in idle states without sacrificing startup time. |
| Integrated 5V LDO (VREG) | Self-powered from VDD ≥2V; supplies internal analog circuits and gate drivers-removes need for external bias rail in single-supply systems. |
| Programmable soft-start | Four discrete durations (0.7/1.4/2.8/5.6ms) set by single MODE pin resistor-simplifies power sequencing in multi-voltage FPGA/CPU platforms. |
| All-ceramic capacitor support | Stable operation with zero-ESR ceramic outputs-enables smaller, lower-profile output filters versus electrolytic/tantalum alternatives. |
| Pre-charged startup | Accepts pre-biased output voltage during enable-prevents reverse current flow into powered downstream circuits during hot-swap events. |
Applications
| Server Point-of-Load | Workstation CPU Core Supply |
|---|---|
|
Use Scenario: Delivering 1.0V–1.2V @ 6–8A to dual-socket Xeon processors in 1U rack servers with strict thermal envelope limits. IC Role / Device Role / Timing Role: Primary synchronous buck regulator implementing D-CAP™ control for <10µs load-step response to CPU DVFS transitions. Use Value: 91% peak efficiency at 12V input reduces board-level heat by >3W vs. discrete solutions, enabling higher density without forced air. |
Use Scenario: Powering high-performance GPU cores in professional workstations requiring tight voltage tolerance (<±10mV) under dynamic 0–8A loads. IC Role / Device Role / Timing Role: Fast-transient buck controller with adaptive on-time and ramp compensation to suppress output voltage droop during 5A/µs GPU clock bursts. Use Value: Integrated 5V LDO (VREG) and pre-charged startup eliminate external bias supplies and prevent brownout during PCIe hot-plug events. |
| Telecom Baseband Processing | Industrial FPGA I/O Bank Supply |
|
Use Scenario: Generating 1.8V/3.3V rails for LTE/5G baseband ASICs in outdoor cabinets where ambient temperature swings from –40°C to +85°C. IC Role / Device Role / Timing Role: Robust buck converter with thermal-compensated OCP (TRIP pin) and 145°C thermal shutdown for unattended field operation. Use Value: Selectable 250kHz–1MHz switching frequency allows optimization for EMI compliance in noisy RF environments without redesigning magnetics. |
Use Scenario: Providing configurable 1.2V–3.3V supplies to reconfigurable FPGA I/O banks in factory automation controllers with long product lifecycles. IC Role / Device Role / Timing Role: Programmable soft-start (MODE pin) and redundant OVP (ROVP pin) ensure safe power-up sequencing and fault containment across multiple voltage domains. Use Value: All-ceramic capacitor compatibility extends operational lifetime beyond 10 years-avoiding electrolytic capacitor dry-out failures in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS53319DQPT | 14A rated output current; identical pinout, package, and feature set-requires no PCB changes but demands higher-current magnetics and thermal design. | Targeted at higher-power CPU/GPU rails where 8A headroom is insufficient; shares same control architecture and layout footprint. | Select when full 14A capability is required and thermal margin allows increased copper area and airflow. |
| TPS548A28RJER | 15A rating, 16V max VIN, remote sense capability, and smaller 4mm × 4mm QFN package-lacks ROVP and VREG LDO; requires external bias. | Optimized for data center ASICs needing tighter voltage regulation via remote sensing; not drop-in due to different pin count and missing VREG. | Choose for next-gen high-density servers where remote sensing improves load regulation and footprint reduction outweighs loss of integrated LDO. |
Compared with TPS53318DQPT, TPS53319DQPT offers higher current capacity in identical packaging for seamless scalability, while TPS548A28RJER trades integrated features for higher density and remote sensing-requiring board redesign but enabling tighter output voltage accuracy at scale.
Availability
TPS53318DQPT is available at Aetrix Electronics and suitable for server power delivery, workstation CPU regulation, and telecom baseband processing requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS53318DQPT 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 in high-reliability power conversion.
The TPS5331x family was designed specifically for high-efficiency, low-component-count point-of-load DC-DC conversion in computing infrastructure-emphasizing fast transient response, thermal robustness, and ease of system integration.
FAQ
What is the maximum input voltage the TPS53318DQPT can handle?
The TPS53318DQPT supports a conversion input voltage range of 1.5V to 22V on the VIN pins. Absolute maximum rating is 30V for short-duration transients (per Section 6.1), but continuous operation must remain within 1.5V–22V to ensure reliability and specified performance. Exceeding 22V may trigger undervoltage lockout or damage internal circuitry.
Does the TPS53318DQPT require external compensation components?
No, the TPS53318DQPT uses D-CAP™ mode control that senses output current via the ESR of the output capacitor-eliminating the need for external compensation networks. This simplifies design, reduces BOM count, and improves stability across capacitor aging and temperature variation without tuning.
How does the MODE pin function on the TPS53318DQPT?
The MODE pin on the TPS53318DQPT serves dual functions: it selects between auto-skip Eco-mode and forced continuous conduction mode (FCCM) for light-load operation, and sets internal soft-start duration (0.7ms, 1.4ms, 2.8ms, or 5.6ms) via an external resistor-enabling flexible power sequencing without additional control logic.
Can the TPS53318DQPT operate with only ceramic output capacitors?
Yes, the TPS53318DQPT is explicitly designed to support all-ceramic output capacitors. Its D-CAP™ control architecture relies on capacitor ESR for current sensing, and TI validates stability with zero-ESR ceramics-enabling smaller, more reliable, and longer-life output filtering compared to electrolytic or tantalum alternatives.
What protection features are integrated into the TPS53318DQPT?
The TPS53318DQPT integrates overvoltage (OVP), undervoltage (UVP), overtemperature (145°C shutdown), and valley overcurrent protection (OCP) with thermal compensation via the TRIP pin. It also includes redundant OVP (ROVP pin), UVLO on VREG, and open-drain PGOOD with 1ms startup delay and 2µs fault response-providing comprehensive system-level fault coverage.
TPS53318DQPT 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)
TPS53318DQPT FAQ
1.How can I place an order for TPS53318DQPT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS53318DQPT 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 TPS53318DQPT reliable?
The price and inventory of TPS53318DQPT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS53318DQPT is usually 5 days.
3.What payment methods are accepted for TPS53318DQPT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS53318DQPT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS53318DQPT?
TPS53318DQPT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS53318DQPT 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 TPS53318DQPT?
For technical support, including TPS53318DQPT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS53318DQPT requirements.
6.How does Aetrix verify that TPS53318DQPT is sourced from the original manufacturer or authorized distributors?
All TPS53318DQPT 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 TPS53318DQPT meets industry standards.
7.What is the process for return or replacement of TPS53318DQPT?
All TPS53318DQPT units undergo pre-shipment inspection (PSI). If there is an issue with TPS53318DQPT, 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 TPS53318DQPT part is unused and in its original packaging.
Return procedure for TPS53318DQPT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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