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Texas Instruments TPS54316PWPR
- Part No.:
- TPS54316PWPR
- Manufacturer:
- Texas Instruments
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54316PWPR.pdf
- Description:
- IC REG BUCK 3.3V 3A 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,110
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Product details
Overview
TPS54316PWPR from Texas Instruments is a synchronous buck PWM DC-DC converter IC with integrated 60-mΩ high- and low-side MOSFETs, delivering up to 3 A continuous output current at a fixed 3.3 V output voltage with ±2.5% regulation over temperature and load. It operates from a 3–6 V input, features internal compensation, fast transient response, and powergood signaling-designed for point-of-load regulation in FPGA, DSP, and microprocessor power supplies.
For engineers reviewing the TPS54316PWPR datasheet, TPS54316PWPR pinout, TPS54316PWPR application, or TPS54316PWPR equivalent, key selection criteria include its 3.3 V fixed output, HTSSOP-20 PowerPAD™ package with thermal vias, adjustable switching frequency (280–700 kHz), integrated current limiting, and thermal shutdown protection-critical for compact, high-density power designs requiring stable 3.3 V rails.
Technical Context
The TPS54316PWPR implements a voltage-mode synchronous buck topology with an internal high-performance error amplifier (26 dB open-loop gain, 3–5 MHz unity-gain bandwidth) and adaptive dead-time control to prevent shoot-through. Its PWM comparator features 70–85 ns propagation delay and 100 ns leading-edge blanking for robust current-limit response.
It integrates undervoltage lockout (UVLO start at 2.95 V, hysteresis 0.16 V), programmable slow-start (6.1 ms internal time for 3.3 V output), and a dedicated VBIAS regulator (2.7–2.9 V output) for internal circuitry-enabling reliable startup, sequencing, and noise-immune biasing without external LDOs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V with ±2.5% initial accuracy over –40°C to 125°C junction temperature and 0–3 A load |
| Input Voltage Range | 3 V to 6 V - supports direct regulation from 3.3 V or 5 V intermediate rails |
| Continuous Output Current | 3 A - sustained delivery without derating at TJ ≤ 85°C with proper PCB thermal design |
| Switching Frequency | Adjustable 280–700 kHz via RT resistor; internally set to 350 kHz or 550 kHz via FSEL pin |
| Integrated MOSFET rDS(on) | 60 mΩ high-side and matched low-side - enables >90% efficiency at 3 A, 5 VIN → 3.3 VOUT |
| Thermal Resistance (θJA) | 26.0°C/W - achievable with PowerPAD™ soldered to 2-layer 3″×3″ board with 10 thermal vias |
| Powergood Threshold | 90% of 0.891 V reference (≈0.802 V on VSENSE) - provides precise rail-valid signaling for processor reset |
Pinout & Package
TPS54316PWPR is housed in a thermally enhanced 20-pin HTSSOP (PWP) package with exposed PowerPAD™ for improved heat dissipation. The package requires soldering the PowerPAD™ to AGND plane for optimal thermal performance (RθJA = 26.0°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (Pin 1) | Analog ground reference | Return for compensation network, SS/ENA capacitor, VBIAS bypass, and RT/FSEL resistors; must connect PowerPAD™ here |
| VSENSE (Pin 2) | Error amplifier inverting input | Direct connection to output voltage feedback node; sets regulation point at 0.891 V reference |
| NC (Pin 3) | No internal connection | Unbonded pad - leave unconnected and unrouted |
| PWRGD (Pin 4) | Open-drain powergood output | Pulled low if VSENSE < 90% Vref, UVLO active, or SS/ENA disabled; requires external pull-up |
| BOOT (Pin 5) | Bootstrap supply for high-side driver | Connect 0.022–0.1 µF ceramic capacitor between BOOT and PH to enable floating gate drive |
| PH (Pins 6–10) | Phase node | Junction of internal MOSFETs and output inductor; high-current AC switching node requiring short, low-inductance layout |
| RT (Pin 20) | Frequency setting resistor input | Connect resistor to AGND to set fSW from 280–700 kHz; open for internal 350/550 kHz modes |
| SS/ENA (Pin 18) | Slow-start/enable control | Logic-enable input (threshold 1.2 V); also accepts capacitor for programmable soft-start (6.1 ms typical for 3.3 V) |
| VBIAS (Pin 17) | Bias regulator output | Supplies 2.7–2.9 V to internal circuits; bypass with 0.1–1.0 µF X7R/X5R ceramic to AGND |
| VIN (Pins 14–16) | Main input supply | 3–6 V input for power switches and bias regulator; bypass each pin individually to PGND with 1–10 µF ceramic |
| PGND (Pins 11–13) | Power ground return | High-current return for low-side FET and input/output capacitors; connect to large copper area and VIN/VO grounds |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 60-mΩ MOSFETs | Eliminates external power switches and reduces BOM count while enabling 3 A output in compact HTSSOP-20 |
| Internally compensated control loop | Supports standard 4.7–10 µH inductors and common output capacitors without external compensation components |
| Fast transient response | 10–20 µs recovery time under load steps due to high-bandwidth error amplifier and adaptive dead-time control |
| Programmable switching frequency | 280–700 kHz range via RT resistor allows EMI optimization and inductor size trade-offs |
| Comprehensive protection suite | Includes cycle-by-cycle current limit (4.5–7.5 A trip), thermal shutdown (135–165°C), UVLO, and powergood monitoring |
Applications
| Point-of-Load Regulation for FPGAs | Low-Voltage Server Memory Modules |
|---|---|
Use Scenario: Powers core logic and I/O banks of Xilinx Artix-7 or Intel Cyclone V FPGAs requiring tightly regulated 3.3 V at up to 3 A peak current. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing clean, sequenced 3.3 V rail with PWRGD signaling for FPGA configuration handshake. Use Value: Delivers 3.3 V at ±2.5% accuracy across –40°C to 125°C, enabling reliable FPGA operation without external trimming or post-regulation. |
Use Scenario: Supplies 3.3 V to DDR3/DDR4 memory modules in edge servers where board space and thermal density are constrained. IC Role / Device Role / Timing Role: Compact, thermally efficient DC-DC converter replacing discrete solutions to meet JEDEC DDR module power specs. Use Value: HTSSOP-20 PowerPAD™ package achieves 26.0°C/W θJA, allowing 3 A output without heatsinks in 1U server chassis. |
| Industrial PLC I/O Modules | Networking Line Cards |
Use Scenario: Generates isolated 3.3 V for digital I/O conditioning and communication interfaces in programmable logic controllers operating at –40°C to 85°C. IC Role / Device Role / Timing Role: Robust, wide-temperature buck regulator with UVLO and thermal shutdown for mission-critical industrial environments. Use Value: Guaranteed operation down to –40°C with 2.95 V UVLO start threshold ensures reliable cold-start in factory automation systems. |
Use Scenario: Powers Ethernet PHYs, packet processors, and SerDes interfaces on telecom line cards requiring low-noise 3.3 V with fast load transients. IC Role / Device Role / Timing Role: High-efficiency synchronous buck converter with 70 ns PWM comparator delay for rapid response to burst traffic loads. Use Value: 90%+ efficiency at 3 A and 5 VIN minimizes heat buildup in densely packed 10G/25G line card designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54318RTER | Same SWIFT™ architecture but QFN-16 package; 3.3 V fixed output; lower RθJA (22.5°C/W) but no PowerPAD™ thermal pad | Better thermal performance in space-constrained layouts; lacks HTSSOP's mechanical robustness for high-vibration environments | Choose TPS54318RTER for ultra-compact PCBs needing superior θJA; retain TPS54316PWPR for ruggedized industrial assemblies. |
| MP2315DJ-LF-Z | Monolithic 3 A buck with 3.3 V fixed output; 2.5–5.5 V input; 500 kHz fixed frequency; no PWRGD or SS/ENA pins | Lacks power sequencing and fault signaling-requires external circuitry for system-level reset and enable control | Use MP2315DJ-LF-Z only in cost-sensitive, non-sequenced applications; TPS54316PWPR remains preferred for processor-supply integrity. |
Compared with TPS54318RTER and MP2315DJ-LF-Z, the TPS54316PWPR uniquely combines HTSSOP-20 mechanical reliability, integrated PWRGD/SS/ENA for full system control, and proven thermal performance in industrial temperature ranges-making it the optimal choice for FPGA, PLC, and telecom power designs demanding both precision and robustness.
Availability
TPS54316PWPR is available at Aetrix Electronics and suitable for FPGA power delivery, industrial PLC I/O modules, and networking line cards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for TPS54316PWPR 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 decades of expertise in high-reliability DC-DC conversion.
The TPS54316PWPR belongs to TI's SWIFT™ family of synchronous buck regulators-designed specifically for high-current, low-voltage point-of-load applications in computing, communications, and industrial systems where integration, efficiency, and thermal performance are critical.
FAQ
What is the maximum continuous output current of the TPS54316PWPR?
The TPS54316PWPR delivers up to 3 A continuous output current at 3.3 V with proper PCB thermal design-including soldered PowerPAD™, 10 thermal vias, and 2-layer 3″×3″ board per TI's recommended layout. Derating applies above 85°C junction temperature, where power dissipation drops to 1.54 W at 85°C ambient.
Does the TPS54316PWPR require external compensation components?
No, the TPS54316PWPR features internal compensation optimized for standard 4.7 µH to 10 µH inductors and typical ceramic output capacitors. External compensation is not needed, reducing BOM count and simplifying design-though output filter selection still impacts stability and transient response.
How does the powergood (PWRGD) function work on the TPS54316PWPR?
The TPS54316PWPR's PWRGD pin is an open-drain output that goes high-impedance when VSENSE ≥ 90% of the 0.891 V internal reference (≈0.802 V), indicating valid 3.3 V output. It pulls low during UVLO, SS/ENA disable, thermal shutdown, or output undervoltage-enabling direct connection to processor reset inputs without additional logic.
Can the switching frequency of the TPS54316PWPR be synchronized to an external clock?
No-the TPS54316PWPR does not support external synchronization. It offers three frequency modes: fixed 350 kHz (FSEL ≤ 0.8 V), fixed 550 kHz (FSEL ≥ 2.5 V), or adjustable 280–700 kHz via RT resistor to AGND. For sync capability, consider TI's TPS54320 or TPS544B20 families.
What is the purpose of the VBIAS pin on the TPS54316PWPR?
The VBIAS pin on the TPS54316PWPR outputs a regulated 2.7–2.9 V supply for internal analog and digital blocks. It must be bypassed with a 0.1–1.0 µF X7R/X5R ceramic capacitor to AGND. While usable as a reference for external circuits, loading beyond 100 µA risks degrading regulation accuracy and noise immunity.
TPS54316PWPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 3A
- Frequency - Switching:
- 350kHz, 550kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-HTSSOP
TPS54316PWPR FAQ
1.How can I place an order for TPS54316PWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54316PWPR 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 TPS54316PWPR reliable?
The price and inventory of TPS54316PWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54316PWPR is usually 5 days.
3.What payment methods are accepted for TPS54316PWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54316PWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54316PWPR?
TPS54316PWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54316PWPR 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 TPS54316PWPR?
For technical support, including TPS54316PWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54316PWPR requirements.
6.How does Aetrix verify that TPS54316PWPR is sourced from the original manufacturer or authorized distributors?
All TPS54316PWPR 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 TPS54316PWPR meets industry standards.
7.What is the process for return or replacement of TPS54316PWPR?
All TPS54316PWPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54316PWPR, 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 TPS54316PWPR part is unused and in its original packaging.
Return procedure for TPS54316PWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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