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Texas Instruments TPS54316PWPRG4
- Part No.:
- TPS54316PWPRG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54316PWPRG4.pdf
- Description:
- IC REG BUCK 3.3V 3A 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,915
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Product details
Overview
TPS54316PWPRG4 from Texas Instruments is a 3-A synchronous buck PWM converter with integrated high- and low-side MOSFETs, fixed 3.3-V output, 3–6-V input range, and internal compensation. It delivers up to 3 A continuous output current with 1.0% initial output voltage accuracy and supports fixed 350 kHz or 550 kHz switching frequencies or adjustable 280–700 kHz via external resistor. Used in point-of-load regulation for FPGAs and microprocessors.
For engineers reviewing the TPS54316PWPRG4 datasheet, TPS54316PWPRG4 pinout, TPS54316PWPRG4 application, or TPS54316PWPRG4 equivalent, key selection criteria include its 3.3-V fixed output, HTSSOP-20 PowerPAD™ package with thermal performance (RθJA = 26.0°C/W), integrated 60-mΩ MOSFETs, powergood signaling, and undervoltage lockout at 2.95 V.
Technical Context
The TPS54316PWPRG4 implements a voltage-mode synchronous buck topology with an internally compensated error amplifier, adaptive dead-time control, and cycle-by-cycle peak current limiting. Its PWM comparator compares the error amplifier output against a sawtooth ramp generated by the oscillator, enabling precise duty-cycle control under transient load steps.
It features dual-function SS/ENA pin for enable control and programmable soft-start, BOOT capacitor-based high-side gate drive, and a dedicated VBIAS regulator (2.7–2.9 V) powering internal analog circuitry. Thermal shutdown activates at 150°C with 10°C hysteresis, and PWRGD provides open-drain power-good status referenced to 90% of 0.891-V internal reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 3.3 V ±2.5% over –40°C to 125°C, 0–3 A load, 4–6 V input - enables direct replacement of LDOs in 3.3-V rail applications. |
| Input voltage range | 3 V to 6 V - supports single-cell Li-ion, 3.3-V/5-V system rails, and intermediate bus architectures. |
| Continuous output current | 3 A - sufficient for powering mid-tier FPGAs, DSPs, and microprocessor cores without external current sharing. |
| Switching frequency | Fixed 350 kHz or 550 kHz (via FSEL), or 280–700 kHz (via RT resistor) - balances efficiency, size, and EMI in compact designs. |
| Internal MOSFET RDS(on) | High-side: 88 mΩ typ, low-side: 59 mΩ typ at VIN = 6 V - minimizes conduction loss and improves full-load efficiency (>90% typical at 3 A, 5 VIN→3.3 VOUT). |
| Powergood threshold | 90% of 0.891-V reference (≈0.802 V on VSENSE) - provides accurate, noise-immune sequencing signal for downstream logic reset. |
| UVLO threshold | 2.95 V start / 2.80 V stop with 0.16-V hysteresis - prevents erratic startup during brownout conditions. |
Pinout & Package
TPS54316PWPRG4 is housed in a thermally enhanced 20-pin HTSSOP (PWP) package with exposed PowerPAD™ for improved heat dissipation. The package measures 6.5 mm × 4.4 mm × 1.2 mm and requires solder connection of 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 node for compensation network, VBIAS capacitor, RT resistor, and FSEL - must be connected to PowerPAD for stability. |
| VSENSE (Pin 2) | Error amplifier inverting input | Direct connection to output voltage feedback node - determines regulation accuracy and loop stability. |
| BOOT (Pin 5) | Bootstrap supply for high-side driver | Connects 0.022–0.1-µF ceramic capacitor to PH - enables floating gate drive for integrated high-side N-MOSFET. |
| PH (Pins 6–10) | Phase node | Switching node connecting internal MOSFETs to external inductor - high di/dt path requiring tight layout and ground stitching. |
| PWRGD (Pin 4) | Open-drain power-good indicator | Pulled low if VSENSE < 90% Vref, UVLO active, or SS/ENA low - used for processor reset or supply sequencing. |
| RT (Pin 20) | Frequency setting input | Resistor to AGND sets switching frequency from 280–700 kHz - enables EMI optimization and inductor size tradeoffs. |
| SS/ENA (Pin 18) | Enable and soft-start control | Logic-high (>1.2 V) enables operation; external capacitor extends startup time - supports controlled power-up and fault recovery. |
| VBIAS (Pin 17) | Internal bias regulator output | Supplies 2.7–2.9 V to internal circuitry; bypassed with 0.1–1.0 µF ceramic cap to AGND - critical for noise immunity and startup reliability. |
| VIN (Pins 14–16) | Main input supply | 3–6 V input for power switches and VBIAS regulator - requires local 1–10 µF ceramic decoupling to PGND near pins. |
| PGND (Pins 11–13) | Power ground return | High-current return for low-side MOSFET and input/output capacitors - must be tied to large copper pour and thermal vias to PowerPAD. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 60-mΩ high-side / 59-mΩ low-side MOSFETs | Eliminates external power stage components, reduces board area by >40% vs discrete solutions, and improves thermal coupling between switches. |
| Internally compensated control loop | Enables stable operation with standard 4.7–10 µH inductors and common output capacitors - no external compensation network required. |
| Fast transient response (10–20 µs recovery) | Supports dynamic load steps in FPGA core supplies without excessive output voltage deviation - critical for digital logic integrity. |
| Programmable soft-start (3.3–7.6 ms internal, extendable externally) | Prevents inrush current into bulk capacitance during power-up - protects input source and avoids brownout on shared rails. |
| Powergood (PWRGD) with 35-µs deglitch | Provides robust, noise-immune sequencing signal for processors and ASICs - eliminates false resets during transient events. |
| Thermal shutdown with 10°C hysteresis | Protects device during sustained overload or poor heatsinking - automatic recovery after cooldown avoids manual reset requirement. |
Applications
| Point-of-Load Regulation for Microprocessors | Low-Voltage Networking Equipment |
|---|---|
|
Use Scenario: Powers ARM Cortex-A series or x86-compatible microprocessors in industrial gateways requiring clean, tightly regulated 3.3-V I/O or auxiliary rails. IC Role / Device Role / Timing Role: Primary DC-DC step-down regulator delivering 3.3 V at up to 3 A with fast transient response and power-good sequencing. Use Value: Replaces multi-component discrete buck solutions, reducing BOM count by 7+ parts while maintaining <±2.5% output accuracy across temperature and load. |
Use Scenario: Supplies 3.3-V logic rails in Ethernet switches, PoE injectors, and optical line terminals where space and thermal density are constrained. IC Role / Device Role / Timing Role: High-efficiency synchronous buck converter operating at 550 kHz to minimize inductor size and meet EMI Class B limits. Use Value: Delivers >92% efficiency at 2 A load (5 VIN→3.3 VOUT), reducing thermal load in sealed enclosures and eliminating need for heatsinks. |
| FPGA Core and I/O Supply | Portable Computing Power Management |
|
Use Scenario: Provides configurable 3.3-V I/O supply for Xilinx Artix-7 or Intel MAX 10 FPGAs in battery-powered test equipment and edge AI modules. IC Role / Device Role / Timing Role: Fixed-output buck regulator with programmable soft-start and PWRGD signaling for FPGA configuration sequence control. Use Value: Internal slow-start time of 6.1 ms ensures controlled voltage ramp, preventing FPGA configuration errors due to premature clock enable. |
Use Scenario: Generates 3.3-V system rail in ultra-thin notebooks and 2-in-1 convertibles using 3.7-V Li-ion batteries with limited PCB real estate. IC Role / Device Role / Timing Role: Compact, thermally optimized buck converter leveraging HTSSOP PowerPAD™ for passive cooling in fanless designs. Use Value: RθJA = 26.0°C/W enables 3-A operation at 70°C ambient without derating - critical for thin-profile thermal envelopes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54316PWPR | Same silicon, identical electrical specs, but shipped in standard tape-and-reel (no G4 suffix indicating RoHS-compliant green packaging) | No functional difference; G4 denotes lead-free, halogen-free, matte-tin finish - required for EU WEEE/RoHS compliance | Select TPS54316PWPRG4 for new designs targeting global environmental compliance; TPS54316PWPR acceptable for legacy or non-regulated markets. |
| TPS54318RGER | 3-A, 3–6-V input, adjustable 0.8–3.3-V output; includes light-load efficiency mode (Eco-mode™) and SYNC input for clock synchronization | Supports dynamic output voltage scaling and multi-rail synchronization - not suitable for fixed 3.3-V-only use without external resistive divider | Choose TPS54318RGER only when adjustable output or system-level clock sync is required; TPS54316PWPRG4 offers simpler, lower-cost fixed-voltage solution. |
Compared with TPS54316PWPR and TPS54318RGER, the TPS54316PWPRG4 provides guaranteed 3.3-V fixed output with no external feedback components, superior thermal resistance in the PowerPAD™ package, and simplified qualification for RoHS-compliant production - making it optimal for cost-sensitive, high-volume 3.3-V point-of-load applications.
Availability
TPS54316PWPRG4 is available at Aetrix Electronics and suitable for point-of-load regulation, FPGA power delivery, and portable computing applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TPS54316PWPRG4 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 ICs.
The TPS54316PWPRG4 belongs to TI's SWIFT™ family of integrated synchronous buck regulators, designed specifically for high-density, low-voltage DC-DC conversion in space-constrained applications such as communications infrastructure and portable electronics.
FAQ
What is the output voltage tolerance of the TPS54316PWPRG4 over temperature and load?
The TPS54316PWPRG4 maintains a fixed 3.3-V output with ±2.5% regulation over –40°C to 125°C junction temperature, 4–6 V input, and 0–3 A load. This specification includes initial accuracy, line regulation (0.21%/V), and load regulation (0.21%/A), ensuring consistent performance in thermally demanding environments without external trimming. The TPS54316PWPRG4 uses a trimmed 0.891-V internal reference and high-precision error amplifier to achieve this stability.
Can the TPS54316PWPRG4 operate with a 3.3-V input supply?
No, the TPS54316PWPRG4 requires a minimum input voltage of 3 V to exit undervoltage lockout, but its recommended operating input range is 3–6 V. At 3.3-V input, the maximum achievable duty cycle (90%) limits output to approximately 2.97 V - below the 3.3-V nominal output. Therefore, the TPS54316PWPRG4 is not suitable for 3.3-V input-to-3.3-V output applications; it is intended for step-down conversion from higher rails like 5 V or battery packs.
How does the PowerPAD™ thermal pad affect the TPS54316PWPRG4's thermal performance?
The exposed PowerPAD™ on the TPS54316PWPRG4 must be soldered to a solid AGND copper plane with ≥6 thermal vias to achieve the specified RθJA of 26.0°C/W. Without soldering the PowerPAD™, RθJA degrades to 57.5°C/W, causing junction temperature to rise ~30°C higher at 3 A - potentially triggering thermal shutdown. Proper PowerPAD™ implementation is mandatory for full 3-A continuous operation in ambient temperatures above 50°C.
What is the purpose of the SS/ENA pin on the TPS54316PWPRG4, and how is it configured for enable-only operation?
The SS/ENA pin serves dual functions: logic enable and soft-start timing control. For enable-only use, tie SS/ENA directly to VIN (≥1.2 V) through a 10-kΩ resistor - this exceeds the 1.2-V enable threshold and disables external capacitor influence. The TPS54316PWPRG4 then starts with its internal 6.1-ms soft-start time. Leaving SS/ENA floating or unconnected will keep the device disabled, as the pin defaults to shutdown state.
Does the TPS54316PWPRG4 support external frequency synchronization?
No, the TPS54316PWPRG4 does not include a SYNC pin and cannot be synchronized to an external clock. It supports only three frequency modes: fixed 350 kHz (FSEL ≤0.8 V), fixed 550 kHz (FSEL ≥2.5 V), or adjustable 280–700 kHz (FSEL floating + RT resistor to AGND). For synchronization capability, consider the TPS54318RGER or TPS54328DDAR, which feature dedicated SYNC inputs compatible with external clock sources.
TPS54316PWPRG4 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:
- Discontinued at Digi-Key
- 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
TPS54316PWPRG4 FAQ
1.How can I place an order for TPS54316PWPRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54316PWPRG4 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 TPS54316PWPRG4 reliable?
The price and inventory of TPS54316PWPRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54316PWPRG4 is usually 5 days.
3.What payment methods are accepted for TPS54316PWPRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54316PWPRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54316PWPRG4?
TPS54316PWPRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54316PWPRG4 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 TPS54316PWPRG4?
For technical support, including TPS54316PWPRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54316PWPRG4 requirements.
6.How does Aetrix verify that TPS54316PWPRG4 is sourced from the original manufacturer or authorized distributors?
All TPS54316PWPRG4 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 TPS54316PWPRG4 meets industry standards.
7.What is the process for return or replacement of TPS54316PWPRG4?
All TPS54316PWPRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS54316PWPRG4, 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 TPS54316PWPRG4 part is unused and in its original packaging.
Return procedure for TPS54316PWPRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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