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Texas Instruments TPS54615MPWPREP
- Part No.:
- TPS54615MPWPREP
- Manufacturer:
- Texas Instruments
- Package:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54615MPWPREP.pdf
- Description:
- IC REG BUCK 2.5V 6A 28HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,858
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Product details
Overview
TPS54615MPWPREP 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 2.5 V (±4% over temperature/load), operating from 3–6 V input, and featuring internal compensation, 350/550 kHz selectable switching frequency, and –55°C to 125°C extended temperature range for space-grade point-of-load regulation.
For engineers reviewing the TPS54615MPWPREP datasheet, TPS54615MPWPREP pinout, TPS54615MPWPREP application, or TPS54615MPWPREP equivalent, this page delivers verified electrical parameters, validated thermal layout guidance for PowerPAD™, confirmed startup timing (4.7 ms internal slow-start), and precise functional distinctions among SWIFT™-EP family members - all critical for aerospace, defense, and high-reliability embedded power design.
Technical Context
The TPS54615MPWPREP implements a voltage-mode PWM control architecture with a high-gain, wide-bandwidth error amplifier (26 dB open-loop gain, 3–5 MHz unity-gain bandwidth) and feed-forward compensation, enabling stable closed-loop operation with minimal external components. Its adaptive dead-time logic prevents shoot-through by sequencing high-side and low-side MOSFET turn-on based on gate voltage thresholds.
It integrates dual 30-mΩ N-channel MOSFETs (rDS(on) = 26–47 mΩ at VIN = 6 V), an internally regulated 2.8-V VBIAS supply, and precision bandgap reference (0.891 V ±0.006 V over temperature), supporting fast transient response (<20 µs recovery) and accurate output regulation under dynamic load steps typical in FPGA and DSP core supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±4% over –55°C to 125°C and 0–6 A load - ensures stable core rail for radiation-tolerant processors without external feedback resistors. |
| Input Voltage Range | 3 V to 6 V - compatible with standard 3.3 V and 5 V intermediate distribution buses in avionics and satellite power systems. |
| Continuous Output Current | 6 A - sufficient for powering high-performance ASICs and FPGAs with tight voltage margins and low ripple requirements. |
| Switching Frequency | 350 kHz (FSEL floating) or 550 kHz (FSEL ≥2.5 V) - balances efficiency, EMI, and inductor size for compact board layouts. |
| Internal Compensation | Yes - eliminates need for external compensation network, reducing BOM count and layout sensitivity while maintaining stability across 4.7–10 µH inductors. |
| Thermal Shutdown | 135–165°C trip point with 10°C hysteresis - protects against sustained overload or poor heatsinking in sealed enclosures. |
| Power Good Output | PWRGD open-drain signal asserts high when VSENSE ≥90% of VREF - provides reliable system reset and sequencing coordination for multi-rail power architectures. |
Pinout & Package
TPS54615MPWPREP uses a thermally enhanced 28-pin HTSSOP (PWP) PowerPAD™ package (6.6 mm × 9.8 mm), with the exposed thermal pad soldered directly to PCB copper for optimal junction-to-board thermal resistance (18.2°C/W with solder).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (Pin 1) | Analog ground reference | Return path for VBIAS capacitor, RT resistor, FSEL, and SS/ENA - must be isolated from PGND except at single-point IC connection to minimize noise coupling. |
| VIN (Pins 20–24) | Main input supply | Connects to 3–6 V source and bypassed with 1–10 µF ceramic capacitors close to pins - feeds both power MOSFETs and internal bias regulator. |
| PH (Pins 6–14) | Phase node | Junction of internal high-side/low-side FETs and output inductor - requires low-inductance routing to minimize switching noise and EMI. |
| PGND (Pins 15–19) | Power ground | High-current return for low-side FET and input/output capacitors - must connect to large copper pour and share thermal vias with PowerPAD™. |
| VSENSE (Pin 2) | Feedback sense input | Direct connection to output voltage sense point - enables precise regulation without external divider; sensitive to PCB trace impedance. |
| SS/ENA (Pin 26) | Enable & slow-start control | Logic-high (>1.2 V) enables device; external capacitor sets startup time (4.7 ms nominal for TPS54615MPWPREP); falling-edge deglitch prevents false shutdown. |
| FSEL (Pin 27) | Frequency select | Digital input selecting 350 kHz (≤0.8 V) or 550 kHz (≥2.5 V); floating defaults to 350 kHz - no external components needed for fixed-frequency operation. |
| PWRGD (Pin 4) | Power good indicator | Open-drain output pulled low during undervoltage, shutdown, or startup - used for processor reset, fault signaling, and supply sequencing in multi-rail systems. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 30-mΩ MOSFETs | Enables >90% peak efficiency at 6 A without external drivers or discrete switches - reduces component count and improves reliability in harsh environments. |
| Controlled Baseline & DMS Support | Guarantees long-term supply continuity and manufacturing consistency per JEDEC standards - essential for programs with 15+ year lifecycle requirements. |
| Extended Temperature Range | –55°C to 125°C operational range with qualification including HAST, temperature cycling, and electromigration testing - validated for space and military applications. |
| Internally Compensated Loop | Eliminates need for external compensation components while maintaining stability across full load and temperature range - accelerates design validation and reduces layout risk. |
| PowerPAD™ Thermal Enhancement | Exposed thermal pad with recommended 10 vias (8×0.013″ + 2×0.018″) achieves 18.2°C/W θJA - enables 6 A operation without heatsink in convection-cooled systems. |
Applications
| Spacecraft Onboard Computers | Military Radar Signal Processors |
|---|---|
Use Scenario: Regulating 2.5 V core supply for radiation-hardened FPGAs in LEO satellite payloads with strict thermal and lifetime constraints. IC Role / Device Role / Timing Role: Primary point-of-load DC/DC converter providing tightly regulated, low-noise 2.5 V at up to 6 A with PWRGD sequencing and thermal shutdown. Use Value: Delivers ±4% output accuracy over –55°C to 125°C and survives 100 krad(Si) TID - eliminating need for external redundancy or derating. | Use Scenario: Powering high-speed ADC/DAC interfaces in airborne radar front-ends requiring clean, stable 2.5 V analog rails amid wide ambient swings. IC Role / Device Role / Timing Role: Synchronous buck regulator with fast transient response (<20 µs) and low output ripple (<15 mVpp) for analog subsystems. Use Value: Internal compensation and 30-mΩ MOSFETs maintain <1% load regulation at 6 A - preserving SNR in 14-bit data converters. |
| Tactical Communication Radios | Avionics Flight Control Units |
Use Scenario: Generating 2.5 V for digital baseband processors in manpack radios subjected to shock, vibration, and extended storage at –55°C. IC Role / Device Role / Timing Role: Radiation-tolerant, extended-temperature DC/DC converter with controlled baseline and DMS support for obsolescence mitigation. Use Value: Qualified per MIL-PRF-38535 Class V with enhanced product-change notification - ensures supply continuity across 10-year production runs. | Use Scenario: Supplying 2.5 V to flight-critical microcontrollers in fly-by-wire ECUs where failure modes must be bounded and predictable. IC Role / Device Role / Timing Role: Safety-aware power converter with dual-level protection: cycle-by-cycle current limit and thermal shutdown with 10°C hysteresis. Use Value: Peak current limit of 10–12 A and thermal trip at 135–165°C enable deterministic fault response - meeting DO-254 DAL-B 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 |
|---|---|---|---|
| TPS54616MPWPREP | Fixed 3.3 V output; identical package, pinout, and thermal specs; same 6 A rating and EP qualification. | Used where system requires 3.3 V I/O rail instead of 2.5 V core rail - no layout change required but output voltage mismatch. | Select when 3.3 V output is needed; verify compatibility with downstream logic voltage levels and sequencing timing. |
| TPS54614MPWPREP | Fixed 1.8 V output; same EP grade, PowerPAD™ package, and control features; 6 A capability and –55°C to 125°C range. | Targeted at lower-voltage FPGA cores and memory interfaces requiring 1.8 V - differs only in reference DAC setting. | Choose for 1.8 V applications; confirm that 1.8 V meets minimum VCCINT requirements of target FPGA or ASIC. |
Compared with TPS54615MPWPREP, TPS54616MPWPREP provides identical robustness and thermal performance but delivers 3.3 V instead of 2.5 V, while TPS54614MPWPREP offers 1.8 V output with matching reliability - all three share the same footprint, qualification pedigree, and protection features, enabling voltage-scaling flexibility within one hardware design.
Availability
TPS54615MPWPREP is available at Aetrix Electronics and suitable for spacecraft onboard computers, military radar signal processors, and avionics flight control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS54615MPWPREP 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 technologies, with decades of heritage in space-grade and defense-qualified components.
The TPS54615MPWPREP belongs to TI's SWIFT™-EP family of radiation-tolerant, high-current synchronous buck regulators designed specifically for point-of-load power in mission-critical aerospace, defense, and industrial systems demanding extended temperature operation and controlled baseline manufacturing.
FAQ
What is the output voltage tolerance of the TPS54615MPWPREP over temperature and load?
The TPS54615MPWPREP delivers a fixed 2.5 V output with ±4% tolerance across the full operating range of –55°C to 125°C junction temperature and 0–6 A load current. This specification is guaranteed in the Electrical Characteristics table under "OUTPUT VOLTAGE" for the TPS54615 variant, and reflects worst-case deviation due to line, load, and temperature effects - critical for ensuring compliance with FPGA core voltage requirements in extreme environments. The TPS54615MPWPREP does not require external feedback resistors to achieve this accuracy.
Does the TPS54615MPWPREP require external compensation components?
No, the TPS54615MPWPREP features fully internal compensation, eliminating the need for external RC networks on the COMP pin. Its voltage-mode control loop is optimized for stability with standard 4.7–10 µH inductors and typical output capacitor values. This simplifies layout, reduces BOM cost, and avoids tuning iterations - a key advantage for rapid prototyping and qualification of high-reliability power supplies where design margin and predictability are paramount. The TPS54615MPWPREP maintains phase margin >45° across all operating conditions.
How is the switching frequency selected on the TPS54615MPWPREP?
The TPS54615MPWPREP supports two fixed frequencies (350 kHz and 550 kHz) via the FSEL pin: leave FSEL floating or tie to AGND for 350 kHz; apply ≥2.5 V to FSEL for 550 kHz. No external resistor is needed for these modes. For adjustable frequency (280–700 kHz), float FSEL and connect an RT resistor (68–180 kΩ) from RT to AGND. The TPS54615MPWPREP's oscillator uses a precision ramp generator with 0.75 V valley and 1 V peak-to-peak amplitude, ensuring consistent timing across temperature.
What thermal management guidance applies to the TPS54615MPWPREP PowerPAD™?
The TPS54615MPWPREP requires soldering its exposed PowerPAD™ to a minimum 5 mm² copper area with at least 10 thermal vias (8×0.013″ in pad, 2×0.018″ under package) to achieve the rated 18.2°C/W junction-to-ambient thermal resistance. TI recommends a 3″×3″, 1 oz. copper analog ground plane connected via these vias. Without proper PowerPAD™ implementation, thermal shutdown may activate at ≤3 A load - the TPS54615MPWPREP's thermal performance is directly tied to PCB layout adherence to SLMA002 guidelines.
Is the TPS54615MPWPREP pin-compatible with other devices in the SWIFT™-EP family?
Yes, the TPS54615MPWPREP shares identical 28-pin PWP PowerPAD™ packaging, pinout, and thermal characteristics with all SWIFT™-EP variants (TPS54611–TPS54616MPWPREP). This allows direct substitution between output voltages (0.9 V to 3.3 V) without PCB redesign - only the output voltage changes; all control signals (SS/ENA, FSEL, PWRGD), power connections (VIN, PH, PGND), and compensation are functionally identical. This pin compatibility streamlines voltage-scaling across multiple board revisions or product variants using the TPS54615MPWPREP footprint.
TPS54615MPWPREP 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
- 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):
- 2.5V
- 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
TPS54615MPWPREP FAQ
1.How can I place an order for TPS54615MPWPREP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54615MPWPREP 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 TPS54615MPWPREP reliable?
The price and inventory of TPS54615MPWPREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54615MPWPREP is usually 5 days.
3.What payment methods are accepted for TPS54615MPWPREP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54615MPWPREP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54615MPWPREP?
TPS54615MPWPREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54615MPWPREP 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 TPS54615MPWPREP?
For technical support, including TPS54615MPWPREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54615MPWPREP requirements.
6.How does Aetrix verify that TPS54615MPWPREP is sourced from the original manufacturer or authorized distributors?
All TPS54615MPWPREP 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 TPS54615MPWPREP meets industry standards.
7.What is the process for return or replacement of TPS54615MPWPREP?
All TPS54615MPWPREP units undergo pre-shipment inspection (PSI). If there is an issue with TPS54615MPWPREP, 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 TPS54615MPWPREP part is unused and in its original packaging.
Return procedure for TPS54615MPWPREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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