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Texas Instruments TPS54314QPWPRQ1
- Part No.:
- TPS54314QPWPRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54314QPWPRQ1.pdf
- Description:
- IC REG BUCK 1.8V 3A 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,029
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Product details
Overview
TPS54314QPWPRQ1 from Texas Instruments is an automotive-grade, 3-A synchronous-buck PWM converter with integrated 60-mΩ high- and low-side MOSFETs, fixed 1.8-V output (±2.5% over temperature/load), 3–6-V input range, and internal compensation. It delivers point-of-load regulation for FPGAs and DSPs in telematics systems.
For engineers reviewing the TPS54314QPWPRQ1 datasheet, TPS54314QPWPRQ1 pinout, TPS54314QPWPRQ1 application, or TPS54314QPWPRQ1 equivalent, key selection factors include its AEC-Q100 qualification, 350/550 kHz fixed-frequency or 280–700 kHz adjustable switching, thermal shutdown at 135–165°C, and PowerPAD™ thermally enhanced 20-pin HTSSOP package.
Technical Context
The TPS54314QPWPRQ1 implements a voltage-mode PWM control architecture with a high-performance error amplifier (3–5 MHz unity-gain bandwidth) and adaptive dead-time logic to manage MOSFET timing. Its internal 0.891-V reference is trimmed for ±1% initial accuracy at 25°C and maintains stability across −40°C to 125°C junction temperature.
It integrates undervoltage lockout (UVLO start at 2.95 V, hysteresis 0.14 V), slow-start/enable logic with 3.3-ms internal ramp time, and power-good monitoring with 90% Vref threshold and 35-µs deglitch. The device supports both fixed-frequency operation via FSEL pin and externally adjustable frequency via RT resistor (68 kΩ–180 kΩ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 6 V - supports direct connection to automotive 5-V or 3.3-V distributed rails without pre-regulation. |
| Output Voltage | Fixed 1.8 V ±2.5% - precision-regulated for core supply of 1.8-V FPGAs, ASICs, and microprocessors. |
| Continuous Output Current | 3 A - sufficient for mid-tier DSPs and communication SoCs with dynamic load steps up to 2 A. |
| Switching Frequency | 350 kHz / 550 kHz (fixed) or 280–700 kHz (adjustable) - enables EMI optimization and inductor size trade-offs. |
| MOSFET RDS(on) | 59–88 mΩ (high-side, VIN = 6 V) - ensures >90% efficiency at 3-A load with 5-V input and 1.8-V output. |
| Junction Temperature Range | −40°C to 125°C - qualified per AEC-Q100 Grade 1 for under-hood automotive applications. |
| Thermal Shutdown | 135–165°C trip, 10°C hysteresis - protects against sustained overload or poor PCB thermal design. |
Pinout & Package
TPS54314QPWPRQ1 uses a thermally enhanced 20-pin HTSSOP (PWP) PowerPAD™ package (6.4 mm × 6.3 mm, 1.2 mm height) with exposed thermal pad soldered to AGND for optimal heat dissipation. Requires ≥10 thermal vias (6×0.013″ in pad, 4×0.018″ under package) and separate analog/power ground planes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (Pin 1) | Analog ground reference | Return for feedback divider, SS/ENA capacitor, VBIAS bypass, and RT/FSEL networks; must connect directly to PowerPAD. |
| VSENSE (Pin 2) | Error amplifier inverting input | Direct connection to output voltage sense point enables precise regulation and fast transient response. |
| NC (Pin 3) | No internal connection | Unbonded pin - must remain unconnected on PCB. |
| PWRGD (Pin 4) | Open-drain power-good indicator | Asserts high-impedance when VSENSE ≥ 90% Vref; used for processor reset sequencing and fault signaling. |
| BOOT (Pin 5) | Bootstrap supply for high-side gate driver | Requires 0.022–0.1 µF ceramic capacitor to PH; enables efficient high-side FET drive without external charge pump. |
| PH (Pins 6–10) | Phase node | Internal switch node connecting high/low FETs and external inductor; high di/dt path requiring tight layout and short traces. |
| RT (Pin 20) | Frequency-setting resistor input | Connects to AGND via 68–180 kΩ resistor to set switching frequency from 280–700 kHz. |
| FSEL (Pin 19) | Frequency select logic input | Logic-low (≤0.8 V) selects 350 kHz; logic-high (≥2.5 V) selects 550 kHz; floating enables RT-based adjustment. |
| SS/ENA (Pin 18) | Slow-start/enable control | Enable threshold 0.82–1.4 V; internal 3.3-ms soft-start prevents inrush current; external capacitor extends ramp time. |
| VBIAS (Pin 17) | Bias regulator output | Supplies 2.7–2.95 V to internal circuitry; requires 0.1–1 µF X7R/X5R ceramic bypass to AGND. |
| VIN (Pins 14–16) | Main input supply | Accepts 3–6 V; multiple pins reduce IR drop and improve decoupling - bypass each to PGND with 1–10 µF ceramic caps. |
| PGND (Pins 11–13) | Power ground return | High-current return for low-side FET and input/output capacitors; must tie to large copper pour and connect to PowerPAD only via AGND. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use across −40°C to +125°C ambient, supporting telematics and ADAS subsystems. |
| Integrated 60-mΩ MOSFETs | Eliminates external power switches and reduces BOM count, board area, and thermal design complexity. |
| Internally compensated control loop | Enables stable operation with standard 4.7–10 µH inductors and 470–1000 µF output capacitors - no external compensation required. |
| Adjustable switching frequency (280–700 kHz) | Allows EMI spread-spectrum tuning and optimization of inductor size vs. efficiency trade-off. |
| Power good (PWRGD) with 90% Vref threshold | Provides reliable system-level power sequencing and fault detection without external supervisor IC. |
| Thermal shutdown with 10°C hysteresis | Prevents latch-up during overload while enabling automatic recovery once junction temperature falls below trip minus hysteresis. |
Applications
| Automotive Telematics Control Unit | Industrial FPGA-Based Edge AI Module |
|---|---|
Use Scenario: Powers 1.8-V I/O banks and transceivers in LTE/V2X communication modules mounted in vehicle dashboards or rearview mirrors. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering clean, sequenced 1.8-V rail with PWRGD-driven reset coordination for modem and baseband processors. Use Value: AEC-Q100 qualification ensures reliability under automotive thermal cycling and vibration; 3-A capability supports burst transmit loads without droop. | Use Scenario: Supplies configurable logic and memory interfaces in ruggedized edge inference accelerators deployed in factory automation gateways. IC Role / Device Role / Timing Role: Synchronous buck converter providing tightly regulated 1.8-V core voltage with fast transient response to handle FPGA configuration and inference workload spikes. Use Value: Internal compensation and 3.3-ms soft-start simplify layout and ensure deterministic startup; PowerPAD thermal design sustains full load at 85°C ambient. |
| Point-of-Load for DSP-Based Radar Signal Processor | Low-Voltage Power for Optical Transceiver Line Card |
Use Scenario: Regulates 1.8-V supply for high-speed digital signal processors in 77-GHz automotive radar front-ends operating near engine compartments. IC Role / Device Role / Timing Role: High-efficiency DC/DC converter with UVLO and thermal shutdown protecting against battery brownouts and localized overheating. Use Value: 60-mΩ MOSFETs and optimized thermal pad deliver >92% efficiency at 2.5-A load, minimizing heat generation in confined enclosures. | Use Scenario: Generates 1.8-V bias for laser driver ICs and limiting amplifiers in pluggable SFP+/QSFP optical modules used in telecom infrastructure. IC Role / Device Role / Timing Role: Fixed-output buck regulator with precise 1.8-V regulation and low output ripple (<10 mVpp) critical for analog laser bias stability. Use Value: 1% initial accuracy and <0.21%/A load regulation maintain optical output power consistency across varying data rates and temperatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous-buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54313QPWPRQ1 | Fixed 1.5-V output; identical package, pinout, and feature set except output voltage and internal slow-start time (5.6 ms vs. 3.3 ms). | Suitable where 1.5-V core rail is required for older DSPs or specific ASIC families; not interchangeable without schematic revision. | Select only if target application mandates 1.5-V output; otherwise, TPS54314QPWPRQ1 provides optimal match for 1.8-V logic domains. |
| LM61480QRNTRQ1 | Higher 8-A rating, 2.7–6.5-V input, 1-MHz max frequency, and improved light-load efficiency via DCM mode; different pinout and package (16-pin WQFN). | Applicable in next-generation designs needing higher current headroom or tighter EMI control; requires PCB redesign and firmware revalidation. | Choose for scalability beyond 3 A or when migrating to newer automotive platforms; not a drop-in replacement due to pinout and layout incompatibility. |
Compared with TPS54314QPWPRQ1, TPS54313QPWPRQ1 offers identical functionality at 1.5 V but longer startup, while LM61480QRNTRQ1 provides higher current and frequency flexibility at the cost of layout redesign - making TPS54314QPWPRQ1 the optimal choice for established 1.8-V automotive PoL implementations.
Availability
TPS54314QPWPRQ1 is available at Aetrix Electronics and suitable for automotive telematics, industrial FPGA power management, and optical transceiver biasing requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for TPS54314QPWPRQ1 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 automotive ICs, with decades of experience in power management innovation.
The TPS543xx-Q1 SWIFT™ family delivers highly integrated, thermally robust synchronous buck converters designed specifically for automotive infotainment, ADAS, and body electronics demanding AEC-Q100 reliability and minimal external components.
FAQ
What is the output voltage tolerance of the TPS54314QPWPRQ1 over temperature and load?
The TPS54314QPWPRQ1 provides a fixed 1.8-V output with ±2.5% regulation accuracy across the full operating range: −40°C to 125°C junction temperature, 3–6-V input, and 0–3-A load. This specification is verified per TI's SGLS242G datasheet, ensuring consistent performance in automotive environments where thermal stress and load transients are common. The TPS54314QPWPRQ1 achieves this using a trimmed 0.891-V internal reference and high-precision error amplifier.
Does the TPS54314QPWPRQ1 require external compensation components?
No, the TPS54314QPWPRQ1 features an internally compensated control loop optimized for standard output filter configurations (e.g., 4.7–10 µH inductors and 470–1000 µF capacitors). This eliminates the need for external compensation networks, reducing design risk and BOM count. The internal compensation ensures stability across line, load, and temperature variations - confirmed by TI's application note SLVA111 and evaluation module testing. The TPS54314QPWPRQ1 is therefore ideal for rapid prototyping and production designs where layout simplicity is critical.
How does the TPS54314QPWPRQ1 handle overcurrent and thermal faults?
The TPS54314QPWPRQ1 incorporates cycle-by-cycle peak current limiting (trip point 4–7.5 A depending on input voltage) and thermal shutdown (135–165°C trip with 10°C hysteresis). When current limit triggers, leading-edge blanking (100 ns) prevents false trips from switch-node noise, and total response time is ≤200 ns. Thermal shutdown disables switching until junction temperature falls below trip minus hysteresis, enabling safe automatic recovery. These protections are fully integrated - no external components needed. The TPS54314QPWPRQ1 thus delivers robust fault resilience in automotive and industrial deployments.
Can the switching frequency of the TPS54314QPWPRQ1 be synchronized to an external clock?
Yes, the TPS54314QPWPRQ1 supports external synchronization over 330–700 kHz by driving a clean clock signal into the FSEL pin while configuring RT for 80% of the target frequency. An RC filter (R ≤ 1 kΩ, C ≤ 68 pF) is recommended between the external source and FSEL to suppress noise. This capability allows EMI reduction via spread-spectrum alignment or system-level clock domain synchronization - a feature explicitly documented in the SGLS242G datasheet's Table 1 and "Oscillator and PWM Ramp" section. The TPS54314QPWPRQ1 retains full functionality during sync mode, including PWRGD and thermal protection.
What is the recommended PCB layout practice for the PowerPAD of the TPS54314QPWPRQ1?
The PowerPAD of the TPS54314QPWPRQ1 must be soldered directly to an AGND plane using ≥10 thermal vias: six 0.013″-diameter vias within the exposed pad area and four 0.018″-diameter vias under the package perimeter. The AGND plane should be a dedicated 1-oz copper layer, sized ≥3″ × 3″ for full 3-A operation at 85°C ambient. Analog and power ground planes must tie together only at the PowerPAD to minimize noise coupling. Input/output capacitors, VIN/PGND pins, and inductor connections must route exclusively to the PGND plane. This layout is validated in TI's TPS54314 evaluation module and detailed in Figure 11 of SGLS242G. Adhering to this ensures the TPS54314QPWPRQ1 meets thermal and EMI specifications.
TPS54314QPWPRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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 ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-HTSSOP
TPS54314QPWPRQ1 FAQ
1.How can I place an order for TPS54314QPWPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54314QPWPRQ1 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 TPS54314QPWPRQ1 reliable?
The price and inventory of TPS54314QPWPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54314QPWPRQ1 is usually 5 days.
3.What payment methods are accepted for TPS54314QPWPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54314QPWPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54314QPWPRQ1?
TPS54314QPWPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54314QPWPRQ1 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 TPS54314QPWPRQ1?
For technical support, including TPS54314QPWPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54314QPWPRQ1 requirements.
6.How does Aetrix verify that TPS54314QPWPRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS54314QPWPRQ1 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 TPS54314QPWPRQ1 meets industry standards.
7.What is the process for return or replacement of TPS54314QPWPRQ1?
All TPS54314QPWPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS54314QPWPRQ1, 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 TPS54314QPWPRQ1 part is unused and in its original packaging.
Return procedure for TPS54314QPWPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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