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Texas Instruments TPS54614MPWPREP
- Part No.:
- TPS54614MPWPREP
- Manufacturer:
- Texas Instruments
- Package:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54614MPWPREP.pdf
- Description:
- IC REG BUCK 1.8V 6A 28HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,591
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Product details
Overview
TPS54614MPWPREP from Texas Instruments is a radiation-hardened, high-density synchronous buck PWM converter with integrated 30-mΩ MOSFETs, delivering up to 6 A continuous output at fixed 1.8 V with ±3% regulation over –55°C to 125°C. It operates from 3-V to 6-V input, features internal compensation, and targets point-of-load regulation for FPGAs and DSPs in aerospace and defense systems.
For engineers reviewing the TPS54614MPWPREP datasheet, TPS54614MPWPREP pinout, TPS54614MPWPREP application, or TPS54614MPWPREP equivalent, key selection criteria include its extended temperature range (–55°C to 125°C), PowerPAD™ thermal package, dual-frequency select (350/550 kHz), internal slow-start time of 3.3 ms, and integrated current limit protection with 12-A peak capability.
Technical Context
The TPS54614MPWPREP implements a voltage-mode synchronous buck architecture with an internal error amplifier (5 MHz unity-gain bandwidth), adaptive dead-time control, and leading-edge blanking (100 ns) for robust current sensing. Its oscillator supports both fixed-frequency operation (350 kHz or 550 kHz via FSEL) and externally adjustable frequency (280–700 kHz via RT resistor).
It integrates dual N-channel MOSFETs (rDS(on) = 36–65 mΩ at 3 V, 26–47 mΩ at 6 V), a precision 0.891-V reference (±0.5% over temperature), and independent analog (AGND) and power (PGND) ground planes tied internally to the PowerPAD™ thermal pad - requiring careful PCB layout with ≥8 thermal vias for reliable 6-A operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V with ±3% regulation across full load (0–6 A), temperature (–55°C to 125°C), and input (3–6 V) - enables direct replacement of discrete LDOs in FPGA core rails. |
| Input Voltage Range | 3 V to 6 V - compatible with standard 3.3-V and 5-V intermediate bus architectures in avionics and space-grade power systems. |
| Continuous Output Current | 6 A - supported by low RDS(on) MOSFETs and thermally enhanced 28-pin PWP PowerPAD™ package with soldered thermal pad. |
| Switching Frequency | Selectable 350 kHz (FSEL ≤0.8 V) or 550 kHz (FSEL ≥2.5 V); externally adjustable 280–700 kHz via RT resistor - balances EMI, efficiency, and inductor size. |
| Thermal Shutdown | Trips at 135–165°C with 10°C hysteresis - protects against sustained overload or airflow loss in sealed enclosures. |
| Power Good Output | PWRGD open-drain signal asserts high when VSENSE ≥90% of 1.8 V (i.e., ≥1.62 V) - provides sequenced enable for downstream logic or processors. |
| Quiescent Current | 9.8–23.5 mA depending on frequency mode - optimized for low-noise biasing in always-on subsystems without compromising transient response. |
Pinout & Package
TPS54614MPWPREP is housed in a thermally enhanced 28-pin HTSSOP (PWP) PowerPAD™ package (6.6 mm × 9.8 mm) with an exposed copper thermal pad on the underside, requiring solder connection to a dedicated AGND plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (Pin 1) | Analog ground reference | Return for SS/ENA capacitor, VBIAS bypass, RT resistor, and FSEL - must connect directly to analog ground plane, not shared with PGND. |
| BOOT (Pin 5) | Bootstrap supply node | Drives high-side MOSFET gate via 0.022–0.1-µF ceramic capacitor to PH - critical for maintaining gate drive above VIN during high-duty-cycle operation. |
| PH (Pins 6–14) | Phase node | Switching node connecting internal high/low-side MOSFETs to external inductor - requires tight layout with minimal loop area to reduce EMI and ringing. |
| PGND (Pins 15–19) | Power ground return | High-current return path for low-side MOSFET and input/output capacitors - must tie to large copper pour and separate from AGND except at single-point IC connection. |
| PWRGD (Pin 4) | Power-good status | Open-drain output signaling valid regulation (VSENSE ≥1.62 V); pulled high externally to enable downstream circuitry or fault logging. |
| RT (Pin 28) | Frequency set input | Connects to AGND via resistor (68–180 kΩ) to program switching frequency from 280–700 kHz - enables EMI optimization without changing components. |
| SS/ENA (Pin 26) | Enable & slow-start control | Logic-enable input (1.2 V threshold); also accepts external capacitor to extend soft-start beyond internal 3.3 ms - prevents inrush into large output capacitance. |
| VBIAS (Pin 25) | Bias regulator output | 2.7–3.0 V internal LDO output; bypassed with 0.1–1 µF ceramic capacitor to AGND - supplies internal circuitry and may serve as external reference. |
| VIN (Pins 20–24) | Main input supply | 3–6 V input for power switches and VBIAS regulator; each pin must be decoupled with 1–10 µF ceramic capacitor near package - reduces input ripple and improves PSRR. |
| VSENSE (Pin 2) | Feedback sense input | Direct connection to output rail for closed-loop regulation; high-impedance input referenced to AGND - requires Kelvin sense trace for accuracy under high load. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 30-mΩ MOSFETs | Enables 6-A continuous output without external power stages - reduces BOM count and board area while maintaining >90% efficiency at 5-V input. |
| Internal compensation | Eliminates need for external compensation network - simplifies design for 4.7–10 µH inductors and standard POSCAP/ceramic output capacitors. |
| Controlled baseline & DMS support | Guaranteed long-term availability and consistent parametric performance - essential for aerospace programs with 15+ year production lifecycles. |
| Extended temperature range | Specified operation from –55°C to 125°C virtual junction temperature - validated per JEDEC standards including HAST, temperature cycling, and intermetallic life testing. |
| Adaptive dead-time control | Prevents shoot-through by dynamically delaying high-side turn-on until low-side gate falls below 2 V - improves reliability under wide VIN and load transients. |
Applications
| FPGA Core Power Supply | DSP Point-of-Load Regulation |
|---|---|
|
Use Scenario: Providing stable 1.8-V core voltage to Xilinx Kintex-7 or Intel Arria 10 FPGAs in satellite payload processing units. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering up to 6 A with fast transient response (<20 µs recovery) to handle dynamic logic switching. Use Value: Eliminates need for external MOSFET drivers and compensation components, reducing solution size by >40% versus controller-based designs. |
Use Scenario: Regulating 1.8-V I/O or memory interface rails for TI C66x DSPs in radar signal processing modules operating in extreme ambient conditions. IC Role / Device Role / Timing Role: High-reliability DC/DC converter with thermal shutdown and UVLO hysteresis, ensuring safe startup and fault containment in unattended systems. Use Value: Maintains ±3% output accuracy across –55°C to 125°C without calibration - avoids timing margin loss in high-speed SerDes interfaces. |
| Aerospace Avionics Power Distribution | Defense Communications Baseband |
|
Use Scenario: Converting 28-V aircraft bus (via intermediate 5-V rail) to 1.8-V for mission-critical flight control microcontrollers in DO-254-compliant hardware. IC Role / Device Role / Timing Role: Radiation-tolerant (EP grade) buck converter with controlled baseline and qualification pedigree - meets MIL-PRF-38535 Class V requirements. Use Value: Guaranteed supply continuity and documented process stability eliminate requalification risk during long-term production ramp. |
Use Scenario: Powering 1.8-V ADC/DAC front-ends and digital baseband ASICs in SDR radios deployed in desert or maritime environments. IC Role / Device Role / Timing Role: Thermally robust regulator using PowerPAD™ and 8+ thermal vias to sustain 6-A load at 85°C ambient without derating. Use Value: Achieves >88% efficiency at 3.3-V input and 6-A load - minimizes heat generation in conduction-cooled chassis with no forced airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54614PWPR | Commercial-grade (–40°C to 125°C), same pinout and electrical specs but lacks EP qualification, DMS support, and extended temp validation. | Suitable for industrial or test equipment where radiation tolerance and 15-year supply assurance are not required. | Select TPS54614PWPR only for non-mission-critical applications with shorter lifecycle expectations and lower reliability certification burden. |
| LM27402SQ/NOPB | Requires external MOSFETs; supports 1.5–20 V input, 0.6–5.5 V adjustable output; no integrated slow-start or PWRGD; 3.5-A max continuous. | Used in flexible lab power supplies or multi-rail systems needing programmable output, but adds complexity and board area. | Choose LM27402SQ/NOPB when adjustable output voltage or higher input range is mandatory, and thermal management allows discrete FET placement. |
Compared with TPS54614MPWPREP, TPS54614PWPR offers identical functionality at lower cost but lacks radiation hardening and long-term supply guarantees, while LM27402SQ/NOPB trades integration for flexibility - making TPS54614MPWPREP the optimal choice for space-qualified 1.8-V FPGA rails demanding zero-layout change and guaranteed longevity.
Availability
TPS54614MPWPREP is available at Aetrix Electronics and suitable for aerospace power distribution, FPGA core regulation, and defense communications baseband applications requiring stable component supply across extended product lifecycles.
Supply support for TPS54614MPWPREP 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 high-reliability power management solutions, with decades of heritage in space-grade component development.
The TPS54614MPWPREP belongs to TI's SWIFT™ family of radiation-hardened synchronous buck converters, engineered specifically for high-density, extended-temperature point-of-load regulation in aerospace, defense, and critical infrastructure systems.
FAQ
What is the operating temperature range of the TPS54614MPWPREP?
The TPS54614MPWPREP is specified for operation from –55°C to 125°C virtual junction temperature, validated per JEDEC standards including HAST, temperature cycling, and intermetallic life testing. This extended range supports deployment in spacecraft, high-altitude UAVs, and ground-based radar systems where ambient extremes exceed commercial limits. The device maintains full 6-A output capability across this range when properly heatsinked via the PowerPAD™.
Does the TPS54614MPWPREP require external compensation components?
No, the TPS54614MPWPREP features internal compensation optimized for standard output filter configurations - eliminating the need for external Type II or III compensation networks. Users can directly implement 4.7–10 µH inductors and 470–680 µF POSCAP/ceramic output capacitors without stability tuning. This simplifies design, reduces bill-of-materials, and accelerates qualification for high-reliability applications where design iteration is costly.
How does the PowerPAD™ thermal pad on the TPS54614MPWPREP improve thermal performance?
The exposed PowerPAD™ on the TPS54614MPWPREP must be soldered to a dedicated AGND copper plane using ≥8 thermal vias (0.013" diameter) to dissipate heat efficiently. This configuration reduces thermal impedance to 18.2°C/W (with solder), enabling continuous 6-A operation at 85°C ambient. Without proper PowerPAD™ connection, power dissipation drops by >55%, risking thermal shutdown or accelerated wear - making correct PCB layout non-negotiable for rated performance.
Can the TPS54614MPWPREP be synchronized to an external clock?
The TPS54614MPWPREP does not support direct external clock synchronization. Its FSEL pin selects between two internal frequencies (350 kHz or 550 kHz), and the RT pin enables resistor-programmed frequency adjustment (280–700 kHz), but no dedicated SYNC input exists. For systems requiring strict EMI control via clock synchronization, designers must use alternative controllers like the LM5115 or select fixed-frequency operation and filter harmonics with shielded inductors and layout optimization.
What is the purpose of the VBIAS pin on the TPS54614MPWPREP?
The VBIAS pin on the TPS54614MPWPREP outputs a regulated 2.7–3.0 V supply derived from the internal LDO, used to power analog and digital blocks within the IC. It must be bypassed with a 0.1–1 µF X7R/X5R ceramic capacitor to AGND, placed adjacent to the pin. While primarily for internal biasing, VBIAS may serve as a stable reference for external circuits - provided loading remains below 100 µA and noise coupling is minimized to avoid degrading regulation accuracy.
TPS54614MPWPREP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- 28-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:
- 6A
- Frequency - Switching:
- 350kHz, 550kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-HTSSOP
TPS54614MPWPREP FAQ
1.How can I place an order for TPS54614MPWPREP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54614MPWPREP 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 TPS54614MPWPREP reliable?
The price and inventory of TPS54614MPWPREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54614MPWPREP is usually 5 days.
3.What payment methods are accepted for TPS54614MPWPREP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54614MPWPREP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54614MPWPREP?
TPS54614MPWPREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54614MPWPREP 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 TPS54614MPWPREP?
For technical support, including TPS54614MPWPREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54614MPWPREP requirements.
6.How does Aetrix verify that TPS54614MPWPREP is sourced from the original manufacturer or authorized distributors?
All TPS54614MPWPREP 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 TPS54614MPWPREP meets industry standards.
7.What is the process for return or replacement of TPS54614MPWPREP?
All TPS54614MPWPREP units undergo pre-shipment inspection (PSI). If there is an issue with TPS54614MPWPREP, 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 TPS54614MPWPREP part is unused and in its original packaging.
Return procedure for TPS54614MPWPREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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