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Texas Instruments TPS54314PWPG4
- Part No.:
- TPS54314PWPG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54314PWPG4.pdf
- Description:
- IC REG BUCK 1.8V 3A 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,569
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Product details
Overview
TPS54314PWPG4 from Texas Instruments is a 3-A synchronous buck PWM converter with integrated high- and low-side MOSFETs, fixed 1.8-V output voltage, 3-V to 6-V input range, and internal compensation. It delivers up to 3 A continuous output current with ±2.5% output voltage accuracy over temperature and load, and supports point-of-load regulation for FPGAs and microprocessors in space-constrained industrial systems.
For engineers reviewing the TPS54314PWPG4 datasheet, TPS54314PWPG4 pinout, TPS54314PWPG4 application, or TPS54314PWPG4 equivalent, key selection considerations include its 1.8-V fixed output, HTSSOP-20 PowerPAD™ package with thermal vias, 350/550 kHz fixed or 280–700 kHz adjustable switching frequency, and integrated powergood (PWRGD) signaling for supply sequencing and fault monitoring.
Technical Context
The TPS54314PWPG4 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 UVLO circuit enforces a 2.95-V startup threshold and 2.8-V shutdown threshold with 0.16-V hysteresis, while the SS/ENA pin enables both logic-level enable control and external slow-start capacitor programming.
It integrates a 2.8-V VBIAS regulator for internal circuitry, uses a bootstrap gate drive for the high-side MOSFET (requiring a 0.022–0.1-µF BOOT-to-PH capacitor), and provides open-drain PWRGD with 90% Vref trip threshold and 35-µs deglitching-critical for reliable processor reset and supply sequencing in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V with ±2.5% accuracy across –40°C to 125°C, 0–3 A load, and 3–6 V input - ensures stable core voltage for 1.8-V I/O domains. |
| Input Voltage Range | 3 V to 6 V - compatible with 3.3-V and 5-V intermediate bus architectures without external LDO pre-regulation. |
| Continuous Output Current | 3 A - supports high-current digital loads including FPGA I/O banks and ASIC cores without external current sharing. |
| Switching Frequency | Fixed 350 kHz or 550 kHz (via FSEL pin), or adjustable 280–700 kHz (via RT resistor) - enables optimization of size (higher fs) vs. efficiency (lower fs). |
| Thermal Resistance (RθJA) | 26.0°C/W with soldered PowerPAD™ - requires minimum 10 thermal vias to AGND plane for full 3-A operation at 125°C ambient. |
| Powergood Threshold | 90% of 0.891-V reference (i.e., ~0.802 V on VSENSE) - provides precise undervoltage detection for safe system boot and fault isolation. |
| Current Limit | Typical 6.5 A at 3 V input, 7.5 A at 6 V input - protects against short-circuit faults while allowing brief inrush during startup. |
Pinout & Package
TPS54314PWPG4 is housed in a thermally enhanced 20-pin HTSSOP (PWP) package with exposed PowerPAD™ for direct PCB thermal conduction. The package measures 6.5 mm × 4.4 mm × 1.2 mm and requires solder paste stencil design per TI SLMA002 guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (Pin 1) | Analog ground reference | Return path for compensation network, VBIAS capacitor, RT resistor, and FSEL; must connect directly to PowerPAD™ and analog ground plane. |
| VSENSE (Pin 2) | Error amplifier inverting input | Direct connection to output voltage feedback node; determines regulation accuracy and loop stability. |
| NC (Pin 3) | No internal connection | Unbonded pad; must remain unconnected and not routed to any net. |
| PWRGD (Pin 4) | Open-drain powergood output | Pulled low if VSENSE < 90% Vref, VIN < UVLO, SS/ENA low, or thermal shutdown - used for processor reset or sequencer enable. |
| BOOT (Pin 5) | Bootstrap supply for high-side driver | Connects via 0.022–0.1-µF ceramic capacitor to PH; enables floating gate drive for N-channel high-side MOSFET. |
| PH (Pins 6–10) | Phase node | Junction of internal high- and low-side MOSFETs; connects to output inductor; high di/dt node requiring tight layout and ground stitching. |
| RT (Pin 20) | Frequency setting resistor input | Resistor to AGND sets switching frequency from 280–700 kHz; open = 350/550 kHz depending on FSEL state. |
| SS/ENA (Pin 18) | Slow-start/enable control | Logic-high (>1.2 V) enables device; external capacitor extends soft-start time; internal ramp time = 3.3 ms for TPS54314. |
| VBIAS (Pin 17) | Bias regulator output | Supplies 2.7–2.9 V to internal circuitry; bypass with 0.1–1.0 µF X7R/X5R ceramic capacitor to AGND near pin. |
| VIN (Pins 14–16) | Main input supply | 3–6 V input for power switches and bias regulator; each pin must be individually bypassed to PGND with 1–10 µF ceramic capacitor. |
| PGND (Pins 11–13) | Power ground return | High-current return for low-side MOSFET and input/output capacitors; connect to large copper pour and thermal vias to PowerPAD™. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 60-mΩ high-side / 60-mΩ low-side MOSFETs | Enables single-chip 3-A buck conversion without external power switches - reduces BOM count and layout area by >40% vs. controller + discrete FET solution. |
| Internally compensated voltage-mode control | Eliminates need for external compensation components; supports standard 4.7–10 µH inductors and common output capacitor types for rapid design-in. |
| Fast transient response (10–20 µs recovery) | Minimizes output voltage deviation during load steps typical in FPGA core/I/O rail switching - maintains <±3% droop under 2-A step load. |
| PowerPAD™ thermal enhancement | Reduces junction-to-ambient thermal resistance to 26.0°C/W - allows full 3-A operation at 70°C ambient without heatsink in standard 2-layer PCB. |
| Programmable switching frequency (280–700 kHz) | Permits EMI tuning and inductor size optimization: e.g., 700 kHz enables ≤2.2 µH inductors for ultra-compact designs in portable equipment. |
Applications
| Point-of-Load Regulation for FPGAs | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Powers 1.8-V I/O banks and configuration circuitry in Xilinx Artix-7 or Intel Cyclone V FPGAs within compact programmable logic controllers. IC Role / Device Role / Timing Role: Primary DC-DC converter delivering regulated 1.8 V at up to 3 A; provides PWRGD signal to FPGA INIT_B pin for controlled configuration sequence. Use Value: Integrated MOSFETs and internal compensation reduce solution footprint to <120 mm²; PowerPAD™ enables convection-only cooling in sealed enclosures. |
Use Scenario: Supplies isolated 1.8-V logic rails for analog-to-digital converter interfaces and digital isolator side circuits in DIN-rail mounted automation modules. IC Role / Device Role / Timing Role: Secondary regulated supply derived from 5-V backplane; synchronized via RT resistor to avoid beat frequencies with main 500-kHz SMPS. Use Value: UVLO (2.95 V) prevents brownout-induced latch-up during 24-V DC input dips; ±2.5% output accuracy ensures ADC reference stability over –40°C to 75°C operating range. |
| Networking Line Card Power | Medical Imaging Sensor Interface |
|
Use Scenario: Generates 1.8-V supply for SerDes transceivers and packet buffer memory in 10-Gbps Ethernet line cards with strict EMI requirements. IC Role / Device Role / Timing Role: Low-noise buck converter with adjustable 500-kHz switching frequency; PWRGD signals FPGA configuration completion to host processor. Use Value: Adjustable frequency avoids interference with 125-MHz PCIe reference clock; fast transient response (<15 µs) suppresses jitter induced by bursty traffic loads. |
Use Scenario: Powers 1.8-V analog front-end (AFE) ASICs and precision ADC drivers in portable ultrasound probe electronics. IC Role / Device Role / Timing Role: Clean, low-ripple power source with <10 mVpp noise; SS/ENA pin enables coordinated startup with master timing controller. Use Value: Internal VBIAS regulator supplies stable 2.8 V to internal analog blocks; 26.0°C/W RθJA enables silent operation without fans in handheld form factor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54314PWPR | Same silicon, tape-and-reel packaging (vs. tube for PWPG4); identical electrical specs and thermal performance. | No functional difference; selected for automated SMT assembly lines requiring reel format. | Choose PWPR for high-volume production; PWPG4 is optimal for prototyping and low-volume builds. |
| MP2332HG-18-LF-Z | Monolithic 3-A buck with 1.8-V fixed output but 4.5–28-V input range; no PWRGD or SS/ENA pins; RθJA = 45°C/W. | Suitable for wide-input industrial systems but lacks sequencing support and thermal headroom for 3-A continuous operation above 60°C ambient. | Select only if input exceeds 6 V or PWRGD/sequencing is unnecessary; verify thermal margin with MP2332's higher RθJA. |
Compared with TPS54314PWPG4, the PWPR offers identical performance in reel format for volume manufacturing, while the MP2332HG-18-LF-Z trades sequencing capability and thermal efficiency for wider input range - making it viable only in non-sequenced, lower-ambient applications.
Availability
TPS54314PWPG4 is available at Aetrix Electronics and suitable for point-of-load regulation, FPGA power delivery, and industrial PLC I/O modules requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for TPS54314PWPG4 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 50 years of innovation in high-reliability power conversion solutions.
The TPS5431x family was designed specifically for space-constrained, high-current point-of-load applications in networking, computing, and industrial systems - emphasizing integration, thermal efficiency, and robust protection features.
FAQ
What is the recommended input capacitor configuration for TPS54314PWPG4?
TPS54314PWPG4 requires individual 1–10 µF low-ESR ceramic capacitors placed as close as possible between each VIN pin (14–16) and adjacent PGND pins (11–13). Use X7R or X5R dielectrics rated for ≥10 V. Total effective capacitance should exceed 15 µF with low impedance below 10 MHz to suppress high-frequency switching noise and support peak current demands during load transients.
Does TPS54314PWPG4 support external synchronization to a system clock?
No, TPS54314PWPG4 does not support external synchronization. It offers only internal frequency selection: fixed 350 kHz or 550 kHz (via FSEL pin), or resistor-programmed 280–700 kHz (via RT pin). Unlike the TPS54310, it lacks a SYNC pin. For synchronized operation, consider the TPS54318 or TPS544B20 as alternatives with dedicated SYNC functionality.
How is the slow-start time determined for TPS54314PWPG4?
The internal slow-start time for TPS54314PWPG4 is fixed at 3.3 ms (typical) - verified in Table 1 of the datasheet. When an external capacitor is added between SS/ENA and AGND, the total start-up delay becomes the sum of the internal ramp time plus the RC time constant formed by the capacitor and internal 5-µA charge current. For example, a 100-nF capacitor adds ~20 ms additional delay before regulation is reached.
Can TPS54314PWPG4 operate reliably at 3-A continuous load in a 70°C ambient environment?
Yes, TPS54314PWPG4 can sustain 3-A continuous output at 70°C ambient when implemented per TI's recommended layout: 2-layer PCB with 1.5 oz copper, 10 thermal vias under the PowerPAD™, and proper input/output capacitor placement. At TA = 70°C, its maximum power dissipation rating is 2.12 W (with soldered PowerPAD™), which aligns with calculated losses (~1.8 W at 5-V input, 1.8-V/3-A output, 90% efficiency).
What is the function of the VBIAS pin on TPS54314PWPG4, and how should it be decoupled?
The VBIAS pin on TPS54314PWPG4 outputs a regulated 2.7–2.9 V supply for internal analog and digital circuitry. It must be bypassed with a 0.1–1.0 µF X7R or X5R ceramic capacitor placed directly between VBIAS (Pin 17) and AGND (Pin 1), with minimal trace length. External loading is permitted only if VBIAS remains ≥2.7 V and introduces no switching noise - otherwise, regulation accuracy and transient response degrade.
TPS54314PWPG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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):
- 1.8V
- 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
TPS54314PWPG4 FAQ
1.How can I place an order for TPS54314PWPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54314PWPG4 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 TPS54314PWPG4 reliable?
The price and inventory of TPS54314PWPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54314PWPG4 is usually 5 days.
3.What payment methods are accepted for TPS54314PWPG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54314PWPG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54314PWPG4?
TPS54314PWPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54314PWPG4 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 TPS54314PWPG4?
For technical support, including TPS54314PWPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54314PWPG4 requirements.
6.How does Aetrix verify that TPS54314PWPG4 is sourced from the original manufacturer or authorized distributors?
All TPS54314PWPG4 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 TPS54314PWPG4 meets industry standards.
7.What is the process for return or replacement of TPS54314PWPG4?
All TPS54314PWPG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS54314PWPG4, 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 TPS54314PWPG4 part is unused and in its original packaging.
Return procedure for TPS54314PWPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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