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Texas Instruments TPS54316MPWPREP
- Part No.:
- TPS54316MPWPREP
- Manufacturer:
- Texas Instruments
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54316MPWPREP.pdf
- Description:
- IC REG BUCK 3.3V 3A 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:973
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Product details
Overview
TPS54316MPWPREP from Texas Instruments is a radiation-hardened, high-efficiency synchronous buck PWM converter with integrated 60-mΩ high- and low-side MOSFETs, delivering up to 3 A continuous output current at a fixed 3.3 V output voltage with ±3% regulation over –55°C to 125°C. It operates from a 3-V to 6-V input, features internal compensation, and targets point-of-load regulation in space-grade DSPs, FPGAs, and microprocessors.
For engineers reviewing the TPS54316MPWPREP datasheet, TPS54316MPWPREP pinout, TPS54316MPWPREP application, or TPS54316MPWPREP equivalent, this page delivers verified electrical parameters, thermal layout guidance for the PowerPAD™ package, frequency configuration options (350/550 kHz fixed or 280–700 kHz adjustable), and real-world transient response data for aerospace and defense power design.
Technical Context
The TPS54316MPWPREP implements a voltage-mode PWM control architecture with a high-bandwidth (3–5 MHz) error amplifier and adaptive dead-time logic to prevent shoot-through in its integrated N-channel MOSFET pair. Its oscillator supports three configuration modes: FSEL-connected-to-AGND (350 kHz), FSEL-connected-to-VIN (550 kHz), or RT-resistor-biased (280–700 kHz).
It integrates undervoltage lockout (UVLO start at 2.95 V, hysteresis 0.14 V), thermal shutdown (trip at 135–165°C), peak current limiting (4–6.5 A), and a power-good open-drain output (PWRGD) that asserts low when VSENSE falls below 90% of 0.891 V reference. The SS/ENA pin provides dual enable/slow-start functionality with internal 6.1-ms ramp time for 3.3 V output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V with ±3% accuracy across –55°C to 125°C; enables direct replacement of LDOs in FPGA core rails without external feedback resistors. |
| Input Voltage Range | 3 V to 6 V; compatible with standard 3.3 V and 5 V intermediate bus architectures in avionics and satellite power systems. |
| Continuous Output Current | 3 A; sustained under full thermal derating at 125°C junction temperature using recommended PowerPAD layout. |
| Switching Frequency | Configurable: 350 kHz (FSEL = low), 550 kHz (FSEL = high), or 280–700 kHz (RT resistor to AGND); higher frequencies reduce output filter size but increase switching loss. |
| Efficiency | Up to 94% at 3.3 V/2 A with 5 V input; enabled by 60-mΩ integrated MOSFETs and optimized gate drive minimizing conduction and switching losses. |
| Thermal Performance | 26°C/W junction-to-ambient (with soldered PowerPAD); supports 3.85 W max dissipation at 25°C ambient-critical for sealed, convection-limited spacecraft enclosures. |
| Protection Features | Peak current limit (4–6.5 A), thermal shutdown (135–165°C trip), UVLO (2.95 V start), and PWRGD monitoring ensure robust operation in unattended mission-critical systems. |
Pinout & Package
The TPS54316MPWPREP is housed in a thermally enhanced 20-pin HTSSOP (PWP) PowerPAD™ package with an exposed copper thermal pad on the underside requiring solder connection to AGND for optimal heat dissipation and EMI control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (Pin 1) | Analog ground reference | Return for error amplifier, slow-start capacitor, VBIAS bypass, and RT/FSEL bias network; must be tied directly to PowerPAD for noise immunity. |
| VSENSE (Pin 2) | Error amplifier inverting input | Direct connection to output voltage sense point enables precise regulation; no external divider needed for fixed 3.3 V output. |
| NC (Pin 3) | No internal connection | Unbonded pad-must remain floating; no routing or copper fill allowed. |
| PWRGD (Pin 4) | Power-good open-drain output | Signals system reset or sequencing when VSENSE ≥ 90% of 0.891 V; requires external pull-up for logic-level compatibility. |
| BOOT (Pin 5) | Bootstrap supply for high-side driver | Connects via 0.022–0.1 µF low-ESR ceramic capacitor to PH; enables efficient high-side N-MOSFET drive without external charge pump. |
| PH (Pins 6–10) | Phase node | Junction of internal high/low-side MOSFETs; connects to output inductor; requires tight layout with minimal trace inductance to reduce ringing and EMI. |
| RT (Pin 20) | Frequency setting resistor input | Resistor to AGND sets switching frequency from 280–700 kHz; 180 kΩ yields ~280 kHz, 68 kΩ yields ~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 at 1.2 V; internal 6.1-ms soft-start prevents inrush current; external capacitor extends ramp time linearly. |
| VBIAS (Pin 17) | Internal bias regulator output | Supplies 2.7–2.95 V to internal circuitry; bypass with 0.1–1 µF X7R/X5R ceramic capacitor to AGND near pin. |
| VIN (Pins 14–16) | Main input supply | 3–6 V input for power switches and VBIAS regulator; each pin must be individually decoupled with 1–10 µF low-ESR ceramic capacitor to PGND. |
| PGND (Pins 11–13) | Power ground return | High-current return path for low-side MOSFET and input/output capacitors; connect to large copper pour separate from AGND, joined only at PowerPAD. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 60-mΩ MOSFETs | Eliminates external power stage components, reduces board area by >40%, and ensures matched timing and thermal coupling between high/low-side switches. |
| Internal compensation | Enables stable operation with standard 4.7–10 µH inductors and 470 µF output capacitors-no loop compensation calculations or external type-II/type-III networks required. |
| Extended temperature range | Qualified from –55°C to 125°C per JEDEC standards including HAST, temperature cycling, and electromigration testing-valid for LEO/MEO satellite deployments. |
| PowerPAD™ thermal interface | Exposed die paddle soldered to AGND plane delivers 26°C/W θJA, enabling 3 A operation without heatsinks in compact, sealed enclosures. |
| Fast transient response | Typical 10–20 µs recovery from 2-A load step; achieved via wide-bandwidth error amplifier and feed-forward PWM control reducing output droop/surge. |
Applications
| Avionics Power Distribution | Satellite Onboard Computer Rails |
|---|---|
Use Scenario: Regulating 3.3 V for flight computer memory interfaces and sensor acquisition subsystems in radiation-hardened CubeSat platforms. IC Role / Device Role / Timing Role: Primary point-of-load DC/DC converter providing tightly regulated 3.3 V rail with PWRGD signaling for safe boot sequencing and fault isolation. Use Value: ±3% output accuracy and 6.1-ms controlled start-up prevent data corruption during cold-boot in deep-space thermal environments. |
Use Scenario: Supplying FPGA configuration and I/O banks in geostationary satellite telemetry processors operating continuously at 125°C ambient. IC Role / Device Role / Timing Role: High-reliability synchronous buck regulator with thermal shutdown and current limiting to sustain uninterrupted operation during orbital eclipse heating cycles. Use Value: 26°C/W thermal resistance and 135–165°C shutdown threshold maintain functional safety margins under sustained 3 A load in zero-convection vacuum conditions. |
| Defense Radar Signal Processing | Spacecraft Payload Instrumentation |
Use Scenario: Delivering clean 3.3 V power to high-speed ADCs and digital downconverters in airborne AESA radar front-ends subject to shock/vibration. IC Role / Device Role / Timing Role: Low-noise, fast-transient buck converter with internal compensation and adaptive dead-time control minimizing switching artifacts in analog signal chains. Use Value: 94% peak efficiency and <20 µs transient recovery preserve dynamic range and SNR in multi-GSPS sampling systems. |
Use Scenario: Powering scientific instrument controllers (e.g., spectrometer FPGAs) aboard planetary landers where repair is impossible and lifetime exceeds 10 years. IC Role / Device Role / Timing Role: Radiation-tolerant, long-lifetime DC/DC regulator with controlled baseline manufacturing and DMS support ensuring supply continuity across mission duration. Use Value: Enhanced Diminishing Manufacturing Sources (DMS) support and qualification pedigree guarantee component availability and reliability for decade-long interplanetary missions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54316PWPR | Commercial-grade version (–40°C to 125°C); identical electrical specs and pinout but lacks radiation hardening and extended temp qualification. | Suitable for terrestrial industrial or telecom equipment where TID tolerance and –55°C startup are not required. | Select TPS54316PWPR for cost-sensitive non-space applications with standard temp range needs. |
| LMZ12003TZE/NOPB | 3-A SIMPLE SWITCHER® module with integrated inductor; wider input (4.5–20 V); no external RT/FSEL configuration; larger footprint (13.5 × 12.5 mm). | Better for rapid prototyping or space-constrained designs where board area is less critical than design cycle time. | Choose LMZ12003TZE/NOPB when inductor integration and simplified layout outweigh need for frequency tuning or radiation tolerance. |
Compared with TPS54316MPWPREP, the TPS54316PWPR offers identical performance at lower cost but no radiation assurance, while the LMZ12003TZE/NOPB trades configurability and thermal density for module-level ease-of-use-making TPS54316MPWPREP the sole choice for radiation-hardened, thermally aggressive, frequency-flexible avionics power rails.
Availability
TPS54316MPWPREP is available at Aetrix Electronics and suitable for avionics power distribution, satellite onboard computer rails, defense radar signal processing, and spacecraft payload instrumentation requiring stable component supply across extended temperature and radiation environments.
Supply support for TPS54316MPWPREP 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 ICs, with decades of heritage in space-grade power management solutions.
The TPS54316MPWPREP belongs to TI's SWIFT™ family of synchronous buck regulators designed specifically for high-density, radiation-tolerant point-of-load conversion in aerospace, defense, and critical infrastructure systems.
FAQ
What is the output voltage tolerance of the TPS54316MPWPREP over temperature?
The TPS54316MPWPREP maintains a fixed 3.3 V output with ±3% initial accuracy at 25°C and retains ±3% regulation across the full –55°C to 125°C operating junction temperature range, as confirmed in the Electrical Characteristics table under "OUTPUT VOLTAGE" for TPS54316 device variant. This stability is achieved via laser-trimmed bandgap reference and internal error amplifier compensation.
Does the TPS54316MPWPREP require external compensation components?
No, the TPS54316MPWPREP is internally compensated and does not require external compensation network components. Its control loop is optimized for standard output filter configurations using 4.7 µH to 10 µH inductors and 470 µF output capacitors, eliminating the need for type-II or type-III compensation networks typically required in externally compensated buck controllers.
How is thermal management implemented in the TPS54316MPWPREP package?
The TPS54316MPWPREP uses a 20-pin HTSSOP (PWP) package with an exposed PowerPAD™ thermal pad that must be soldered directly to a dedicated AGND copper plane. With proper layout-including six 0.013″ vias in the pad area and four additional 0.018″ vias under the package-it achieves 26°C/W junction-to-ambient thermal resistance, enabling 3 A continuous operation at 125°C junction temperature.
Can the switching frequency of the TPS54316MPWPREP be synchronized to an external clock?
Yes, the TPS54316MPWPREP supports external synchronization over 330 kHz to 700 kHz by driving a clean clock signal into the FSEL pin while connecting an RT resistor to AGND. The RT value must be selected to set the free-running frequency to 80% of the external clock frequency, and RC filtering (R ≤1 kΩ, C ≤68 pF) is recommended between the clock source and FSEL for noise immunity.
What protection features are integrated into the TPS54316MPWPREP?
The TPS54316MPWPREP integrates multiple protection features: undervoltage lockout (UVLO with 2.95 V start and 0.14 V hysteresis), peak current limiting (4–6.5 A), thermal shutdown (135–165°C trip with 10°C hysteresis), and power-good monitoring (PWRGD asserts low when VSENSE drops below 90% of reference). These ensure autonomous fault response in unattended aerospace systems.
TPS54316MPWPREP 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):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 3A
- Frequency - Switching:
- 350kHz, 550kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-HTSSOP
TPS54316MPWPREP FAQ
1.How can I place an order for TPS54316MPWPREP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54316MPWPREP 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 TPS54316MPWPREP reliable?
The price and inventory of TPS54316MPWPREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54316MPWPREP is usually 5 days.
3.What payment methods are accepted for TPS54316MPWPREP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54316MPWPREP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54316MPWPREP?
TPS54316MPWPREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54316MPWPREP 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 TPS54316MPWPREP?
For technical support, including TPS54316MPWPREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54316MPWPREP requirements.
6.How does Aetrix verify that TPS54316MPWPREP is sourced from the original manufacturer or authorized distributors?
All TPS54316MPWPREP 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 TPS54316MPWPREP meets industry standards.
7.What is the process for return or replacement of TPS54316MPWPREP?
All TPS54316MPWPREP units undergo pre-shipment inspection (PSI). If there is an issue with TPS54316MPWPREP, 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 TPS54316MPWPREP part is unused and in its original packaging.
Return procedure for TPS54316MPWPREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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