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Texas Instruments TPS54314PWPR
- Part No.:
- TPS54314PWPR
- Manufacturer:
- Texas Instruments
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54314PWPR.pdf
- Description:
- IC REG BUCK 1.8V 3A 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,856
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Product details
Overview
TPS54314PWPR from Texas Instruments is a 3-A synchronous buck PWM converter with integrated high- and low-side MOSFETs, fixed 1.8-V output, 3–6-V input range, and internal compensation. It delivers up to 3 A continuous output current with 1.0% initial accuracy and supports point-of-load regulation for FPGAs and microprocessors in space-constrained industrial and computing systems.
For engineers reviewing the TPS54314PWPR datasheet, TPS54314PWPR pinout, TPS54314PWPR application, or TPS54314PWPR equivalent, this device is selected for high-efficiency DC/DC conversion where thermal performance, fast transient response, and minimal external component count are critical - especially in 20-pin HTSSOP PowerPAD™ layouts with tight PCB area budgets.
Technical Context
The TPS54314PWPR implements a voltage-mode synchronous buck architecture with an internally compensated 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.
Switching frequency is configurable via FSEL pin (350 kHz or 550 kHz fixed) or RT resistor (280–700 kHz externally adjustable), with oscillator ramp amplitude of 1 VPP and minimum controllable on-time of 200 ns. The device operates in continuous conduction mode and includes undervoltage lockout (2.95 V start, 2.8 V stop), thermal shutdown (135–165 °C trip), and powergood monitoring (90% VREF threshold).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±2.5% over –40°C to 125°C, 0–3 A load, 3–6 V input - enables direct powering of core logic rails without external feedback resistors. |
| Input Voltage Range | 3 V to 6 V - compatible with 3.3-V and 5-V intermediate bus architectures in distributed power systems. |
| Continuous Output Current | 3 A - sufficient for FPGA I/O banks, DSP cores, and ASIC subsystems requiring stable mid-rail voltage. |
| Switching Frequency | 350 kHz (FSEL ≤0.8 V) or 550 kHz (FSEL ≥2.5 V); adjustable 280–700 kHz via RT resistor - balances efficiency vs. size trade-offs in EMI-sensitive designs. |
| High-Side rDS(on) | 59 mΩ at VIN = 6 V - reduces conduction loss and improves full-load efficiency, especially at higher input voltages. |
| Thermal Resistance (θJA) | 26.0 °C/W with PowerPAD™ soldered - enables 3-A operation at ambient temperatures up to 85°C with standard 2-layer PCB layout. |
| Quiescent Current | 6.2–12.8 mA depending on frequency configuration - supports low-power standby modes without compromising startup speed. |
Pinout & Package
TPS54314PWPR 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 for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (Pin 1) | Analog ground reference | Return path for compensation network, VBIAS capacitor, SS/ENA capacitor, and RT resistor - must be connected to PowerPAD™ for stability. |
| VSENSE (Pin 2) | Error amplifier inverting input | Direct connection to output voltage sense point - determines regulation accuracy; sensitive to PCB trace impedance. |
| NC (Pin 3) | No internal connection | Unbonded pad - must remain unconnected and unstubbed to avoid parasitic coupling. |
| PWRGD (Pin 4) | Open-drain powergood indicator | Pulled low when VSENSE < 90% VREF, UVLO active, or SS/ENA disabled - used for processor reset sequencing and fault signaling. |
| BOOT (Pin 5) | Bootstrap supply for high-side driver | Connects to PH through 0.022–0.1 µF low-ESR ceramic capacitor - 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 directly to output inductor; high di/dt node requiring short, wide copper routing. |
| RT (Pin 20) | Frequency setting resistor input | Connect resistor to AGND to set switching frequency from 280–700 kHz - enables EMI optimization and inductor selection flexibility. |
| SS/ENA (Pin 18) | Slow-start/enable control | Logic-enable input (1.2 V threshold) and external capacitor interface - controls startup slew rate and provides system-level enable/disable capability. |
| VBIAS (Pin 17) | Internal bias regulator output | Supplies regulated ~2.8 V to internal circuitry - requires 0.1–1.0 µF X7R/X5R ceramic bypass capacitor to AGND, placed adjacent to pin. |
| VIN (Pins 14–16) | Main input supply | Power input for MOSFET switches and internal bias regulator - each pin must be individually bypassed to PGND with 1–10 µF low-ESR ceramic capacitor. |
| PGND (Pins 11–13) | Power ground return | High-current return path for low-side MOSFET and input/output capacitors - requires large copper pour and multiple vias to minimize ground bounce. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 60-mΩ high-side and low-side MOSFETs | Eliminates need for external power switches and gate drivers - reduces BOM count and layout complexity while maintaining 3-A capability. |
| Internally compensated control loop | Enables stable operation with standard 4.7–10 µH inductors and common output capacitor values - no external compensation components required. |
| Fast transient response (10–20 µs recovery) | Minimizes output voltage deviation during dynamic load steps typical in FPGA core switching - preserves signal integrity in high-speed digital systems. |
| PowerPAD™ thermal enhancement | Reduces junction-to-ambient thermal resistance to 26.0 °C/W - allows full 3-A output without heatsink in compact industrial or telecom modules. |
| Programmable soft-start via SS/ENA capacitor | Extends startup time beyond internal 3.3 ms default - prevents inrush current damage to input capacitors and upstream converters during hot-plug events. |
Applications
| FPGA Core Supply | DSP Point-of-Load Regulation |
|---|---|
Use Scenario: Powering 1.8-V I/O banks and configuration logic in Xilinx Artix-7 or Intel Cyclone V FPGAs during configuration and active operation. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering tightly regulated 1.8 V at up to 3 A with <2.5% total output variation across temperature and load. Use Value: Eliminates need for external feedback resistors and compensation network - reduces board area by >30% versus discrete controller + MOSFET solutions. |
Use Scenario: Providing clean, low-noise 1.8-V supply to TI C6000 DSP cores operating at 300+ MHz with burst-mode current demands. IC Role / Device Role / Timing Role: High-bandwidth voltage regulator with 10–20 µs transient recovery - maintains core voltage within spec during rapid instruction fetch and MAC operations. Use Value: Internal 60-mΩ MOSFETs and adaptive dead-time control reduce output ripple to <15 mVPP under 2-A step loads - avoids timing margin violations. |
| Industrial PLC I/O Module | Optical Line Card Mid-Rail |
Use Scenario: Generating isolated 1.8-V rail from 5-V backplane in DIN-rail mounted programmable logic controllers with extended temperature requirements. IC Role / Device Role / Timing Role: Robust DC/DC converter with thermal shutdown (135–165 °C) and UVLO (2.95 V start) - ensures reliable startup and fault protection in harsh environments. Use Value: HTSSOP PowerPAD™ package achieves 3-A operation at 85°C ambient without forced air - simplifies thermal design in sealed enclosures. |
Use Scenario: Supplying 1.8-V bias to transimpedance amplifiers and laser driver ICs in 10Gbps SFP+ optical modules with strict EMI limits. IC Role / Device Role / Timing Role: Adjustable-frequency buck converter (280–700 kHz) - enables frequency tuning to avoid interference with serial data lanes and clock harmonics. Use Value: External RT resistor configuration allows precise placement of switching noise outside 1–2 GHz RF bands - meets Class B conducted EMI requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54315PWPR | Fixed 2.5-V output; identical pinout, package, and feature set - differs only in output voltage trim. | Used where 2.5-V logic interfaces or memory I/O require separate regulation - not interchangeable without redesigning feedback or load compatibility. | Select when system requires 2.5-V rail instead of 1.8 V; same layout and thermal design apply. |
| MP2315DJ-LF-Z | Monolithic 3-A buck with 2.5–5.5-V input, 0.8–5.5-V adjustable output, 500-kHz fixed frequency - lacks RT adjustability, PWRGD, and VBIAS pin. | Suitable for cost-sensitive consumer applications where powergood signaling and bias rail generation are unnecessary. | Choose for simplified BOM in non-critical systems; avoid where sequencing, thermal margin, or precision 1.8-V regulation is required. |
Compared with TPS54315PWPR, the TPS54314PWPR offers identical thermal, electrical, and mechanical behavior except for output voltage - making it a direct drop-in replacement only when 1.8 V is required. Versus MP2315DJ-LF-Z, the TPS54314PWPR provides superior accuracy (±2.5% vs ±4%), integrated powergood, and flexible frequency tuning - justifying its use in industrial and communications infrastructure.
Availability
TPS54314PWPR is available at Aetrix Electronics and suitable for FPGA power delivery, DSP point-of-load regulation, industrial PLC I/O modules, and optical line card mid-rail applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance.
Supply support for TPS54314PWPR 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 solutions.
The TPS5431x family was designed specifically for high-density, low-voltage point-of-load applications in computing, networking, and industrial systems - emphasizing integration, thermal efficiency, and ease of design with minimal external components.
FAQ
What is the output voltage tolerance of the TPS54314PWPR over temperature and load?
The TPS54314PWPR delivers a fixed 1.8-V output with ±2.5% regulation accuracy across –40°C to 125°C junction temperature, 3–6-V input, and 0–3-A load conditions. This specification includes initial trim error, line/load regulation, and thermal drift - verified per TI's SLVS416C datasheet Section 6.5. The TPS54314PWPR achieves this without external feedback resistors due to factory-trimmed internal reference and error amplifier.
Can the TPS54314PWPR operate with a 3.3-V input supply?
Yes, the TPS54314PWPR supports input voltages from 3 V to 6 V, making 3.3-V operation fully valid and commonly used in intermediate bus architectures. At 3.3-V input, the device maintains 3-A output capability with reduced conduction loss in the low-side MOSFET. Efficiency remains above 88% at 1.8-V/2-A output per Figure 9 in the datasheet, and thermal performance is enhanced due to lower power dissipation.
Does the TPS54314PWPR require external compensation components?
No, the TPS54314PWPR features an internally compensated voltage-mode control loop optimized for standard 4.7–10 µH inductors and typical ceramic output capacitors. The error amplifier's gain and phase response are fixed to ensure stability without external RC networks - reducing design risk and board area. This internal compensation is validated across all operating conditions in the TPS54314PWPR datasheet Section 7.3.6.
How does the PowerPAD™ thermal pad affect the TPS54314PWPR's thermal performance?
The exposed PowerPAD™ on the TPS54314PWPR must be soldered to a dedicated AGND copper pour to achieve the rated 26.0 °C/W junction-to-ambient thermal resistance. Without soldering, θJA degrades to 57.5 °C/W - limiting usable output current to ~1.5 A at 85°C ambient. TI's recommended land pattern (SLMA002) specifies ten thermal vias under the pad, connected to inner-layer ground planes for optimal heat spreading.
What is the purpose of the VBIAS pin on the TPS54314PWPR?
The VBIAS pin on the TPS54314PWPR supplies a regulated ~2.8 V to internal analog and digital circuitry, independent of input voltage variations. It must be bypassed with a 0.1–1.0 µF X7R/X5R ceramic capacitor to AGND, placed adjacent to the pin. While primarily for internal use, VBIAS can serve as a stable reference for external circuits - but loading beyond 100 µA risks dropping VBIAS below its 2.70-V minimum, affecting TPS54314PWPR functionality.
TPS54314PWPR 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):
- 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
TPS54314PWPR FAQ
1.How can I place an order for TPS54314PWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54314PWPR 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 TPS54314PWPR reliable?
The price and inventory of TPS54314PWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54314PWPR is usually 5 days.
3.What payment methods are accepted for TPS54314PWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54314PWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54314PWPR?
TPS54314PWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54314PWPR 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 TPS54314PWPR?
For technical support, including TPS54314PWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54314PWPR requirements.
6.How does Aetrix verify that TPS54314PWPR is sourced from the original manufacturer or authorized distributors?
All TPS54314PWPR 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 TPS54314PWPR meets industry standards.
7.What is the process for return or replacement of TPS54314PWPR?
All TPS54314PWPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54314PWPR, 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 TPS54314PWPR part is unused and in its original packaging.
Return procedure for TPS54314PWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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