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Texas Instruments TPS54550PWPR
- Part No.:
- TPS54550PWPR
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54550PWPR.pdf
- Description:
- IC REG BUCK ADJ 6A 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:9,718
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Product details
Overview
TPS54550PWPR from Texas Instruments is a 4.5–20 V input, 6-A synchronous buck PWM converter with integrated high-side MOSFET and external low-side MOSFET drive. It delivers adjustable output down to 0.891 V (±1% accuracy), supports 250–700 kHz switching frequency, and features power good (PWRGD), synchronization (SYNC), and thermal shutdown for industrial point-of-load regulation.
For engineers reviewing the TPS54550PWPR datasheet, TPS54550PWPR pinout, TPS54550PWPR application, or TPS54550PWPR equivalent, key selection criteria include its 16-pin HTSSOP PowerPAD™ package, 7.5-A peak current limit, 180° out-of-phase sync capability, adjustable UVLO, and compatibility with high-efficiency DC/DC designs for FPGAs, DSPs, and LCD power rails.
Technical Context
The TPS54550PWPR implements a feed-forward modulator with constant gain (Km = 8 V/V) and adaptive dead-time control to prevent shoot-through between the internal high-side MOSFET and external low-side MOSFET. Its error amplifier provides 60–80 dB open-loop gain and 1–2.8 MHz unity-gain bandwidth for tight transient response.
Switching frequency is set via RT pin resistor (250–700 kHz) or fixed at 250/500 kHz; SYNC operates bidirectionally-outputting a falling-edge signal 180° out of phase with PH when RT is grounded/floating, or accepting external falling-edge sync when RT is resistor-connected. The device uses digital slow-start (1150 cycles) and hiccup-mode overcurrent protection with 4.5-ms recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 20 V - Supports wide industrial input rails including 5 V, 12 V, and 19 V adapters. |
| Output Current | 6 A continuous, 7.5 A peak - Sustains full load under transient conditions without derating at TJ ≤ 125°C. |
| Output Voltage Accuracy | ±1% at 0.891 V reference - Ensures stable core voltage for FPGAs and microprocessors. |
| Switching Frequency | 250 kHz to 700 kHz - Adjustable via RT resistor; enables optimization of size vs. efficiency trade-offs. |
| Thermal Shutdown | 165°C trip, 7°C hysteresis - Protects against sustained overload or poor PCB thermal design. |
| Power Good Output | Open-drain PWRGD with 97% threshold and 2–4 ms delay - Provides reliable system-level power sequencing feedback. |
| UVLO Threshold | 4.49 V start / 3.69 V stop (internal); adjustable via external divider - Prevents erratic startup during brownout conditions. |
Pinout & Package
TPS54550PWPR is housed in a thermally enhanced 16-pin HTSSOP (PWP) package with exposed PowerPAD™ for improved heat dissipation. The package measures 5.0 mm × 4.4 mm × 1.2 mm and requires solder connection of the PowerPAD to PGND/AGND for proper operation and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 VIN | Input supply rail | Bypassed with ≥10-μF ceramic capacitor; supplies high-side FET and bias regulator. |
| 3 UVLO | Undervoltage lockout control | External resistor divider overrides default 4.49 V start threshold for custom brownout behavior. |
| 4 PWRGD | Power good status indicator | Open-drain output pulled low if VSENSE < 97%, overcurrent, thermal fault, or UVLO active. |
| 5 RT | Frequency programming | Resistor to AGND sets 250–700 kHz; floating/grounded selects fixed 500/250 kHz modes. |
| 6 SYNC | Bidirectional sync I/O | Outputs falling edge 180° out of phase with PH when RT grounded/floating; accepts falling-edge sync when RT resistor-connected. |
| 7 SSENA | Enable/slow-start control | Pulled below 0.5 V disables switching; capacitor to ground extends soft-start time for large output capacitance. |
| 8 COMP | Error amplifier output | Connects to VSENSE via RC network for loop compensation and stability tuning. |
| 9 VSENSE | Feedback node | Inverting input of error amp; connected to resistor divider from output to set regulated voltage. |
| 10 AGND | Analog ground reference | Internally isolated ground for sensitive analog circuitry; must connect to PowerPAD and PGND. |
| 11 PGND | Power ground return | Carries high di/dt currents from LSG driver; connects to PowerPAD and AGND for low-impedance path. |
| 12 VBIAS | Bias voltage supply | Provides ~7.8 V internal rail for gate drivers; requires 1.0-μF X7R/X5R ceramic bypass capacitor. |
| 13 LSG | Low-side gate driver output | Drives external N-channel MOSFET gate directly; 100 mA sink/source capability. |
| 14, 15 PH | Phase node connection | Connects to LC filter inductor; carries high-frequency AC switching waveform and DC output current. |
| 16 BOOT | High-side gate bootstrap | Requires 0.1-μF ceramic cap + 24-Ω resistor to PH for high-side FET gate drive voltage generation. |
| PowerPAD | Thermal & electrical ground | Exposed pad must be soldered to PCB copper pour tied to PGND/AGND for thermal conduction and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side MOSFET | 40 mΩ rDS(ON) at VIN = 12 V - Reduces conduction loss and simplifies layout vs. dual-MOSFET controllers. |
| Adjustable output voltage | Down to 0.891 V with ±1% accuracy - Meets low-core-voltage requirements of modern ASICs and processors. |
| 180° out-of-phase synchronization | Two TPS54550PWPR devices reduce RMS input ripple by √2 - Lowers required input capacitance and EMI filtering burden. |
| Thermal shutdown with hysteresis | 165°C trip, 7°C hysteresis - Enables automatic recovery after cooling without external reset circuitry. |
| Digital slow-start | 1150 switching cycles (≈2.3–4.6 ms) - Limits inrush current during startup into large output capacitors. |
Applications
| Industrial Point-of-Load Regulation | FPGA Core Power Supply |
|---|---|
Use Scenario: Regulating 1.2 V or 1.8 V for programmable logic on factory automation controllers with 4.5–20 V input bus. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing dynamic load steps up to 6 A while maintaining tight voltage tolerance. Use Value: Integrated high-side FET and 6-A capability eliminate discrete switch losses, reducing board area and thermal complexity. | Use Scenario: Powering Xilinx or Intel FPGA core rails requiring precise 0.891–1.2 V with fast transient response. IC Role / Device Role / Timing Role: High-bandwidth buck regulator using feed-forward modulation and 2.8 MHz error amp bandwidth for sub-100 ns load step recovery. Use Value: ±1% reference accuracy and digital slow-start ensure reliable configuration and stable operation across temperature. |
| LCD Monitor/TV Backlight Power | Computer Peripheral DC/DC Conversion |
Use Scenario: Generating 3.3 V or 5 V from 12 V input for LCD panel logic and timing controllers in commercial displays. IC Role / Device Role / Timing Role: Fixed-frequency (500 kHz) buck converter synchronized to system clock via SYNC pin to minimize beat frequencies. Use Value: 180° sync capability allows dual-rail designs sharing one bulk capacitor, cutting BOM cost and footprint. | Use Scenario: Converting 19 V adapter output to 5 V or 3.3 V for USB hubs, docking stations, or external storage enclosures. IC Role / Device Role / Timing Role: Wide-input (4.5–20 V), robust controller with thermal shutdown and hiccup-mode OCP for unattended operation. Use Value: Adjustable UVLO prevents startup during unstable input conditions; PWRGD enables safe peripheral enumeration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54650PWPR | Higher 6-A continuous / 8-A peak rating; identical pinout and feature set; improved thermal resistance (35.5°C/W vs. 40.1°C/W). | Preferred for higher ambient temperatures or sustained 6-A loads where junction temperature margin is critical. | Select TPS54650PWPR when operating near thermal limits or requiring extended lifetime at full load. |
| LM5116WGX/NOPB | Controller-only (no integrated high-side FET); supports up to 10 A with external MOSFETs; wider 6–100 V input range; no PowerPAD package. | Suitable for high-input-voltage industrial systems (>20 V) or designs requiring discrete FET selection for efficiency optimization. | Choose LM5116WGX/NOPB for >20 V inputs or when discrete FETs are needed for ultra-low quiescent current or specialized RDS(ON). |
Compared with TPS54550PWPR, TPS54650PWPR offers better thermal performance in the same PWP package, while LM5116WGX/NOPB trades integration for input voltage flexibility and external FET control-making it suitable for non-standard input rails or efficiency-critical high-current designs.
Availability
TPS54550PWPR is available at Aetrix Electronics and suitable for industrial point-of-load regulation, FPGA core power, LCD monitor/TV power, and computer peripheral DC/DC conversion requiring stable component supply and long-term production continuity.
Supply support for TPS54550PWPR 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 power management ICs, with decades of expertise in high-efficiency DC/DC conversion.
The TPS54550PWPR belongs to TI's SWIFT™ synchronous buck controller family, designed specifically for medium-current (up to 6 A), high-efficiency point-of-load applications in industrial, computing, and display systems.
FAQ
What is the maximum output current capability of the TPS54550PWPR?
The TPS54550PWPR delivers 6 A continuous output current and supports up to 7.5 A peak current. This rating assumes proper PCB thermal design with the PowerPAD™ soldered to a minimum 3-inch × 3-inch, 2-layer, 2-oz copper board per TI's recommended layout. Derating applies above +70°C ambient.
How does the TPS54550PWPR achieve 180° out-of-phase synchronization?
The TPS54550PWPR achieves 180° out-of-phase synchronization by configuring the SYNC pin as an output (RT grounded or floating) to generate a falling-edge signal timed to occur midway between rising edges of the PH node. When two TPS54550PWPR devices share this SYNC signal, their input ripple currents cancel, reducing RMS input current by √2.
Can the TPS54550PWPR operate with an input voltage below 4.5 V?
No, the TPS54550PWPR has a hard undervoltage lockout (UVLO) threshold of 4.49 V typical. Operation below 4.5 V is prohibited-the device remains disabled until VIN exceeds the start threshold. External UVLO resistors can raise but not lower this threshold; no design supports sub-4.5 V operation.
What is the purpose of the PowerPAD™ on the TPS54550PWPR package?
The PowerPAD™ on the TPS54550PWPR is an exposed thermal pad that must be soldered to a PCB copper pour connected to PGND and AGND. It serves dual roles: lowering junction-to-ambient thermal resistance (40.1°C/W) and providing low-inductance grounding for high-frequency switching currents, critical for stability and EMI performance.
Does the TPS54550PWPR require an external low-side MOSFET?
Yes, the TPS54550PWPR integrates only the high-side MOSFET and requires an external N-channel low-side MOSFET driven by the LSG pin. This architecture allows designers to select optimal FETs for specific efficiency, thermal, or cost targets-unlike fully integrated buck converters.
TPS54550PWPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 0.891V
- Voltage - Output (Max):
- 17.2V
- Current - Output:
- 6A
- Frequency - Switching:
- 250kHz, 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-HTSSOP
TPS54550PWPR FAQ
1.How can I place an order for TPS54550PWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54550PWPR 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 TPS54550PWPR reliable?
The price and inventory of TPS54550PWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54550PWPR is usually 5 days.
3.What payment methods are accepted for TPS54550PWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54550PWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54550PWPR?
TPS54550PWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54550PWPR 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 TPS54550PWPR?
For technical support, including TPS54550PWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54550PWPR requirements.
6.How does Aetrix verify that TPS54550PWPR is sourced from the original manufacturer or authorized distributors?
All TPS54550PWPR 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 TPS54550PWPR meets industry standards.
7.What is the process for return or replacement of TPS54550PWPR?
All TPS54550PWPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54550PWPR, 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 TPS54550PWPR part is unused and in its original packaging.
Return procedure for TPS54550PWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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