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Texas Instruments TPS54680QPWPREP
- Part No.:
- TPS54680QPWPREP
- Manufacturer:
- Texas Instruments
- Category:
- Special Purpose Regulators
- Package:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54680QPWPREP.pdf
- Description:
- IC REG CONV 1OUT 28HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,596
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Product details
Overview
TPS54680QPWPREP from Texas Instruments is a radiation-hardened, high-current synchronous buck PWM converter with integrated 30-mΩ high-side and low-side MOSFETs, delivering up to 6-A continuous output current from a 3-V to 6-V input. It features programmable switching frequency (280–700 kHz), power-good signaling, enable control, and TRACKIN-based voltage sequencing for dual-rail systems such as FPGA core/I/O supplies. Designed for defense, aerospace, and medical applications operating from –55°C to 125°C.
For engineers reviewing the TPS54680QPWPREP datasheet, TPS54680QPWPREP pinout, TPS54680QPWPREP application, or TPS54680QPWPREP equivalent, key selection criteria include its extended temperature rating, integrated FETs with confirmed 30-mΩ rDS(on) at 3 V, tracking capability via TRACKIN, thermal performance in the PWP PowerPAD package, and compliance with MIL-PRF-38535 Class V/Class Q flow requirements.
Technical Context
The TPS54680QPWPREP implements a voltage-mode PWM control architecture with an internal error amplifier (90–110 dB open-loop gain, 3–5 MHz unity-gain bandwidth) and adaptive dead-time logic. Its TRACKIN pin enables precise power-up/down sequencing by synchronizing output ramp rates with external regulators or reference sources.
It integrates a 2.8-V UVLO with 0.16-V hysteresis, a 0.891-V precision reference (±1.1% over temperature), and protection features including peak-current limiting (7.2–12 A trip range), thermal shutdown (135–165°C), and power-good monitoring with 90% Vref threshold and 3% hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V to 6.0 V - supports standard 3.3-V and 5-V intermediate bus architectures without external pre-regulation. |
| Output Current | 6 A continuous - verified across –55°C to 125°C ambient with proper PCB thermal design using PowerPAD. |
| Switching Frequency | Fixed 350 kHz or adjustable 280–700 kHz via RT resistor - enables optimization of efficiency vs. size trade-offs in high-density layouts. |
| rDS(on) High-Side | 30 mΩ at VIN = 3 V - reduces conduction loss and improves full-load efficiency in low-input-voltage applications. |
| Reference Accuracy | ±1.1% over temperature - ensures tight output regulation (e.g., ±18 mV at 1.8 V) without external trimming. |
| Thermal Rating | Junction-to-board θJB = 13.1°C/W - enables 6-A operation on standard 4-layer boards with ≥3″×3″ 1-oz copper AGND plane. |
| UVLO Threshold | 2.95 V start / 2.80 V stop - prevents erratic startup during brownout conditions in mission-critical systems. |
Pinout & Package
The TPS54680QPWPREP is housed in a thermally enhanced 28-pin HTSSOP (PWP) PowerPAD™ package with exposed thermal pad soldered to AGND. This eliminates need for external heatsinks and achieves θJCbot = 1.3°C/W for direct junction-to-board heat transfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (Pin 1) | Analog ground reference | Return path for compensation network, VBIAS capacitor, RT resistor, and slow-start circuit - must tie directly to PowerPAD. |
| VSENSE (Pin 2) | Error amplifier inverting input | Monitors regulated output via resistive divider - sets output voltage with ±1.1% accuracy when used with internal 0.891-V reference. |
| COMP (Pin 3) | Error amplifier output | Drives Type III compensation network between COMP and VSENSE - determines loop stability and transient response. |
| PWRGD (Pin 4) | Open-drain power-good flag | Sinks current when VSENSE ≥90% Vref - provides reset signal to processors or enables downstream rails in sequenced systems. |
| BOOT (Pin 5) | High-side gate driver supply | Requires 0.022–0.1-μF ceramic capacitor to PH - sustains floating drive for high-side MOSFET during 90% max duty cycle operation. |
| PH (Pins 6–14) | Power phase node | Internal connection point of high-side and low-side FETs - connects to output inductor and carries full AC switching current. |
| RT (Pin 28) | Oscillator frequency set | Resistor to AGND selects switching frequency: 180 kΩ = 280 kHz, 100 kΩ = 500 kHz, 68 kΩ = 700 kHz. |
| TRACKIN (Pin 26) | Sequencing reference input | Accepts external voltage ramp to synchronize startup/shutdown timing with other regulators - enables core/I/O rail tracking. |
| ENA (Pin 27) | Enable/disable control | Logic-high ≥1.4 V enables operation; ≤0.82 V disables with <1.4 µA shutdown current - supports system-level power management. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 30-mΩ MOSFETs | Eliminates external power switches and reduces BOM count while maintaining >90% efficiency at 6 A and 1.8 V out. |
| TRACKIN-based sequencing | Enables deterministic power-up/down order between multiple rails without external timers or supervisors - critical for FPGA and ASIC reliability. |
| PowerPAD thermal package | Delivers 1.3°C/W junction-to-case (bottom) resistance - allows full 6-A load in extended temperature environments without forced airflow. |
| Extended temperature support | Rated for –55°C to 125°C operation with controlled baseline, single-fab/test-site traceability, and 10-year life derating per TI EP quality standards. |
| Robust protection suite | Includes peak-current limit (programmable via VIN), thermal shutdown with 10°C hysteresis, and UVLO with deglitched inputs - ensures fault containment in harsh environments. |
Applications
| Point-of-Load Regulation for FPGAs | Sequenced Dual-Rail DSP Power |
|---|---|
Use Scenario: Supplying core (1.0–1.2 V) and I/O (1.8–3.3 V) rails for Xilinx Kintex or Intel Stratix FPGAs requiring strict power-up order and fast transient response. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing 6-A core rail with TRACKIN-synchronized I/O rail startup via external switch or companion regulator. Use Value: Prevents latch-up and configuration errors by enforcing monotonic voltage ramping with <1% tracking error between rails. | Use Scenario: Powering multi-core digital signal processors (e.g., TI C66x) where memory interface (I/O) must power up before core logic to avoid initialization faults. IC Role / Device Role / Timing Role: Master regulator controlling I/O rail timing while feeding TRACKIN signal to secondary TPS54680 or TPS544B20 for core rail coordination. Use Value: Achieves sub-100-µs inter-rail timing alignment without external sequencing ICs - reducing system latency and component count. |
| High-Density Telecom Line Cards | Ruggedized Medical Imaging Subsystems |
Use Scenario: Distributed 12-V-to-1.8-V conversion on compact optical line terminal (OLT) cards with strict EMI and thermal constraints. IC Role / Device Role / Timing Role: High-efficiency, high-current POL converter operating at 700 kHz to shrink filter size while meeting FCC Class B conducted emissions limits. Use Value: Delivers 92% efficiency at 6 A/1.8 V with <20 mVpp output ripple - enabling fanless cooling and compliance with NEBS Level 3 thermal specs. | Use Scenario: Powering CCD/CMOS sensor interfaces and analog front-ends in portable ultrasound or MRI subsystems requiring long-term reliability under thermal cycling. IC Role / Device Role / Timing Role: Radiation-tolerant, extended-life DC/DC stage supporting 10+ year field deployment with full traceability and MIL-PRF-38535 Class V qualification. Use Value: Guarantees zero latent defects and lifecycle continuity through TI's controlled baseline program - essential for FDA 510(k) submissions and ISO 13485 audits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54680MPWPREP | Same silicon, identical electrical specs, but rated for –55°C to 125°C with V62/04641-02XE qualification - includes extended product-change notification. | Targeted at programs requiring full MIL-PRF-38535 Class Q flow and longer production continuity planning. | Select when long-term availability (>15 years), full military screening, and TI's extended PCN process are mandatory. |
| LMZ31506RVQR | Module-based solution with integrated inductor; 6-A output, 2.95–6 V input, but fixed 500-kHz frequency and no TRACKIN pin. | Lacks sequencing capability and requires larger board area; suited for rapid prototyping where layout simplicity outweighs rail coordination needs. | Choose only if TRACKIN-based sequencing is unnecessary and module-level integration justifies ~30% higher cost and reduced thermal headroom. |
Compared with TPS54680QPWPREP, TPS54680MPWPREP offers identical performance with enhanced program-level support for defense sustainment, while LMZ31506RVQR trades sequencing flexibility and thermal efficiency for faster design-in - making the QPWPREP optimal for high-reliability, multi-rail embedded systems.
Availability
TPS54680QPWPREP is available at Aetrix Electronics and suitable for defense avionics, space-qualified payloads, and medical imaging subsystems requiring stable component supply across extended product lifecycles and extreme environmental operation.
Supply support for TPS54680QPWPREP 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 for industrial, automotive, and aerospace markets.
The TPS54680-EP family was developed to meet stringent MIL-PRF-38535 Class V/Class Q requirements for extended temperature operation, radiation tolerance, and long-term supply chain integrity in mission-critical systems.
FAQ
What is the maximum continuous output current supported by the TPS54680QPWPREP?
The TPS54680QPWPREP delivers 6 A continuous output current across its full operating temperature range of –55°C to 125°C, validated with proper PCB thermal design including the PowerPAD soldered to a ≥3″×3″ 1-oz AGND plane and ≥12 thermal vias. Derating applies above 105°C junction temperature per TI's wirebond life model.
Does the TPS54680QPWPREP support output voltage tracking between multiple rails?
Yes, the TPS54680QPWPREP supports precise power-up and power-down tracking via its dedicated TRACKIN pin. When an external voltage ramp is applied to TRACKIN, the device regulates its output to follow that ramp rate - enabling synchronized startup/shutdown with companion regulators in FPGA, ASIC, or multi-core DSP applications.
What package type and thermal characteristics define the TPS54680QPWPREP?
The TPS54680QPWPREP uses a 28-pin HTSSOP (PWP) PowerPAD package with exposed thermal pad. Key thermal metrics include θJCbot = 1.3°C/W (junction-to-case bottom), θJB = 13.1°C/W (junction-to-board), and θJA = 36.1°C/W (junction-to-ambient, JEDEC high-K board). The PowerPAD must be soldered directly to AGND for rated performance.
How is the switching frequency configured on the TPS54680QPWPREP?
The TPS54680QPWPREP supports both fixed and adjustable frequency modes. Leaving RT (Pin 28) open configures 350 kHz operation. Connecting a resistor from RT to AGND sets frequency: 180 kΩ yields 280 kHz, 100 kΩ yields 500 kHz, and 68 kΩ yields 700 kHz - enabling optimization of efficiency, size, and EMI performance.
What protection features are integrated into the TPS54680QPWPREP?
The TPS54680QPWPREP integrates peak-current limiting (trip range 7.2–12 A depending on VIN), thermal shutdown (135–165°C with 10°C hysteresis), undervoltage lockout (2.95 V start / 2.80 V stop), and power-good monitoring (90% Vref threshold with 3% hysteresis). All protections feature deglitched inputs to prevent false triggering from noise.
TPS54680QPWPREP 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:
- Active
- Applications:
- Converter, Distributed Power Systems
- Voltage - Input:
- 3V ~ 6V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.9V ~ 3.3V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-HTSSOP
TPS54680QPWPREP FAQ
1.How can I place an order for TPS54680QPWPREP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54680QPWPREP 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 TPS54680QPWPREP reliable?
The price and inventory of TPS54680QPWPREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54680QPWPREP is usually 5 days.
3.What payment methods are accepted for TPS54680QPWPREP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54680QPWPREP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54680QPWPREP?
TPS54680QPWPREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54680QPWPREP 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 TPS54680QPWPREP?
For technical support, including TPS54680QPWPREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54680QPWPREP requirements.
6.How does Aetrix verify that TPS54680QPWPREP is sourced from the original manufacturer or authorized distributors?
All TPS54680QPWPREP 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 TPS54680QPWPREP meets industry standards.
7.What is the process for return or replacement of TPS54680QPWPREP?
All TPS54680QPWPREP units undergo pre-shipment inspection (PSI). If there is an issue with TPS54680QPWPREP, 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 TPS54680QPWPREP part is unused and in its original packaging.
Return procedure for TPS54680QPWPREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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