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Texas Instruments TPS54550PWPG4
- Part No.:
- TPS54550PWPG4
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54550PWPG4.pdf
- Description:
- IC REG BUCK ADJ 6A 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,968
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Product details
Overview
TPS54550PWPG4 from Texas Instruments is a synchronous buck PWM converter with integrated high-side MOSFET and external low-side FET drive, delivering up to 6 A continuous (7.5 A peak) output current, adjustable output voltage down to 0.891 V with ±1% accuracy, and programmable switching frequency from 250 kHz to 700 kHz - used in point-of-load regulation for FPGAs and microprocessors.
For engineers reviewing the TPS54550PWPG4 datasheet, TPS54550PWPG4 pinout, TPS54550PWPG4 application, or TPS54550PWPG4 equivalent, key selection criteria include input voltage range (4.5–20 V), thermal shutdown at 165°C, 180° synchronization capability, and PowerPAD™-enhanced thermal performance in the 16-pin HTSSOP package.
Technical Context
The TPS54550PWPG4 implements feed-forward PWM control with adaptive dead-time logic to prevent shoot-through between internal high-side and external low-side MOSFETs. Its modulator gain is fixed at 8 V/V across input voltage and frequency, maintaining stable loop dynamics.
It features a dual-function SYNC pin supporting both input (falling-edge triggered) and output (180° out-of-phase) modes depending on RT pin configuration, and integrates a precision 0.891 V reference trimmed during production for ±1% output accuracy over temperature and line.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 20 V - supports wide industrial and computing supply rails without pre-regulation. |
| Output Current | 6 A continuous, 7.5 A peak - enables single-chip power delivery for mid-power DSPs and ASICs. |
| Output Voltage Accuracy | ±1% at 0.891 V reference - ensures tight regulation for core voltages of modern processors. |
| Switching Frequency | 250–700 kHz (adjustable via RT resistor) - balances efficiency, size, and EMI in compact designs. |
| Thermal Shutdown | 165°C trip with 7°C hysteresis - protects against sustained overload while enabling automatic recovery. |
| UVLO Threshold | 4.49 V start / 3.69 V stop - prevents erratic startup under brownout conditions. |
| Power Good Output | Open-drain PWRGD with 97% threshold and 2–4 ms rising-edge delay - provides reliable system sequencing signal. |
Pinout & Package
TPS54550PWPG4 is housed in a thermally enhanced 16-pin HTSSOP (PWP) package with exposed PowerPAD™ for improved heat dissipation. The package requires solder connection of the PowerPAD to PGND/AGND for proper operation and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1,2) | Input supply rail | 4.5–20 V main power input; requires local 10-μF ceramic bypass. |
| UVLO (Pin 3) | Undervoltage lockout control | External resistor divider overrides default 4.49 V startup threshold. |
| PWRGD (Pin 4) | Power good status indicator | Open-drain output asserts low if VSENSE falls below 97% of target or fault occurs. |
| RT (Pin 5) | Frequency programming | Resistor to AGND sets switching frequency from 250–700 kHz; floating = 500 kHz. |
| SYNC (Pin 6) | Bidirectional sync I/O | Configurable as falling-edge input or 180° out-of-phase output based on RT state. |
| SSENA (Pin 7) | Enable/slow-start control | <0.5 V disables; capacitor to ground extends soft-start time linearly with value. |
| COMP (Pin 8) | Error amplifier output | Connect compensation network (R-C-Zener) between COMP and VSENSE for stability. |
| VSENSE (Pin 9) | Feedback input | Inverting input of error amp; connects to resistor divider from output to set voltage. |
| AGND (Pin 10) | Analog ground reference | Internal analog reference node; must be tied to PGND and PowerPAD. |
| PGND (Pin 11) | Power ground return | High-current return path for LSG driver; connects to PowerPAD and AGND. |
| VBIAS (Pin 12) | Bias supply output | 8.0 V regulated supply for internal circuits; requires 1.0 μF X7R/X5R ceramic bypass. |
| LSG (Pin 13) | Low-side gate driver | 100 mA capable driver for external N-channel MOSFET; no series gate resistor recommended. |
| PH (Pins 14,15) | Phase node connection | Connects to LC filter input; carries high di/dt switching current. |
| BOOT (Pin 16) | High-side gate bootstrap | Requires 0.1 μF ceramic + 24 Ω resistor to PH for high-side FET drive. |
| PowerPAD (Pin 17) | Thermal & electrical ground | Exposed pad must be soldered to PCB ground plane for thermal conduction and PGND/AGND tie. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 40 mΩ high-side MOSFET | Enables high-efficiency operation at 6 A without external high-side switch. |
| Adjustable output down to 0.891 V | Supports modern low-voltage cores (e.g., 0.9 V FPGA I/O, 1.2 V CPU cores) with ±1% accuracy. |
| 180° out-of-phase synchronization | Reduces RMS input ripple current by ~30%, allowing smaller input capacitors in multi-rail systems. |
| Adaptive dead-time control | Prevents shoot-through by dynamically delaying LSG turn-on until PH voltage drops below 1 V. |
| Feed-forward modulator (Km = 8 V/V) | Maintains constant loop gain across input voltage and frequency, simplifying compensation design. |
| Thermally enhanced PowerPAD™ package | 40.1°C/W junction-to-ambient (with 2-layer 3″×3″ board) enables 6 A operation without heatsink. |
Applications
| Point-of-Load Regulation for FPGAs | Industrial LCD Power Supply |
|---|---|
|
Use Scenario: Powers core voltage (e.g., 1.2 V) of Xilinx Artix-7 FPGA with dynamic load steps up to 4 A/μs. IC Role / Device Role / Timing Role: Primary synchronous buck regulator with fast transient response enabled by feed-forward modulator and 0.891 V reference. Use Value: Delivers 6 A continuous current with <1% output deviation during load transients, eliminating need for secondary post-regulation. |
Use Scenario: Generates 3.3 V and 5 V rails for backlight drivers and logic in commercial-grade LCD monitors. IC Role / Device Role / Timing Role: Main DC-DC converter operating at 500 kHz with SYNC output driving secondary TPS54550 for interleaved 180° operation. Use Value: Reduces input capacitor RMS current by 30%, enabling smaller 105°C-rated bulk capacitors and extending lifetime. |
| Computer Peripheral Power | Point-of-Load for High-Performance DSPs |
|
Use Scenario: Supplies 1.8 V to USB 3.0 controller and PCIe switch in docking station with strict thermal limits. IC Role / Device Role / Timing Role: Compact, thermally optimized buck regulator using PowerPAD™ to dissipate >2 W without airflow. Use Value: Maintains full 6 A output at +70°C ambient due to 1.37 W power rating at TA = +70°C (PWP package). |
Use Scenario: Provides 0.95 V core voltage to TI C66x DSP with tight tolerance and low noise requirements. IC Role / Device Role / Timing Role: Precision-regulated buck stage with 1% reference accuracy and open-loop gain >60 dB for stable feedback. Use Value: Achieves <±5 mV output deviation over line, load, and temperature - meeting DSP core voltage spec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54620RGYT | 6-A dual-channel controller with integrated FETs; fixed 600 kHz frequency; no external LSG drive. | Eliminates external low-side MOSFET but lacks 180° sync and adjustable frequency. | Choose when board space is critical and external FET cost/complexity must be avoided. |
| LM5116WGX/NOPB | 100-V input, 5-A controller with external high- and low-side FET drive; no integrated high-side FET. | Supports higher input voltage (up to 100 V) but requires two external MOSFETs and more layout effort. | Choose for industrial 24/48 V input systems where TPS54550PWPG4's 20 V max is insufficient. |
Compared with TPS54550PWPG4, TPS54620RGYT reduces component count but sacrifices flexibility in frequency tuning and sync topology, while LM5116WGX/NOPB extends input range at the cost of increased BOM complexity and footprint.
Availability
TPS54550PWPG4 is available at Aetrix Electronics and suitable for point-of-load regulation, industrial display power, and computer peripheral applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS54550PWPG4 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 TPS54550PWPG4 belongs to TI's SWIFT™ synchronous buck controller family, designed specifically for high-current, high-efficiency point-of-load applications in computing, industrial, and consumer electronics.
FAQ
What is the maximum output current capability of the TPS54550PWPG4?
The TPS54550PWPG4 delivers up to 6 A continuous output current and supports 7.5 A peak current. This rating assumes proper thermal management using the PowerPAD™ and adherence to the specified PCB layout guidelines, including 2 oz. copper and adequate ground plane area. Derating applies above +70°C ambient per the thermal impedance table in the datasheet.
Does the TPS54550PWPG4 require an external low-side MOSFET?
Yes, the TPS54550PWPG4 requires an external low-side N-channel MOSFET driven by the LSG pin. It integrates only the high-side MOSFET (40 mΩ typical rDS(on)). The LSG driver provides 100 mA sink/source capability and is optimized for common logic-level MOSFETs - no gate resistor is recommended per the datasheet.
How is the switching frequency set on the TPS54550PWPG4?
The switching frequency of the TPS54550PWPG4 is set via the RT pin: grounding RT selects 250 kHz, floating RT selects 500 kHz, and connecting a resistor from RT to AGND adjusts frequency from 250 kHz to 700 kHz per the equation fsw ≈ 46000 / RRT(kΩ) – 35.9. The RT resistor value must be selected to achieve the desired frequency within ±10% tolerance.
What is the function of the PowerPAD™ on the TPS54550PWPG4 package?
The PowerPAD™ on the TPS54550PWPG4 is an exposed thermal pad that must be soldered to the PCB ground plane. It serves dual roles: providing low-thermal-resistance path from die to PCB (40.1°C/W junction-to-ambient) and electrically connecting internal PGND and AGND nodes. Failure to solder the PowerPAD™ results in thermal failure and improper operation.
Can the TPS54550PWPG4 synchronize to an external clock source?
Yes, the TPS54550PWPG4 can synchronize to an external clock via the SYNC pin when an RT resistor is used. In this mode, SYNC becomes a falling-edge-triggered input accepting frequencies from 225 kHz to 770 kHz. The RT resistor must be set to 90–110% of the external clock frequency to ensure stable locking and avoid jitter.
TPS54550PWPG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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
TPS54550PWPG4 FAQ
1.How can I place an order for TPS54550PWPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54550PWPG4 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 TPS54550PWPG4 reliable?
The price and inventory of TPS54550PWPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54550PWPG4 is usually 5 days.
3.What payment methods are accepted for TPS54550PWPG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54550PWPG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54550PWPG4?
TPS54550PWPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54550PWPG4 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 TPS54550PWPG4?
For technical support, including TPS54550PWPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54550PWPG4 requirements.
6.How does Aetrix verify that TPS54550PWPG4 is sourced from the original manufacturer or authorized distributors?
All TPS54550PWPG4 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 TPS54550PWPG4 meets industry standards.
7.What is the process for return or replacement of TPS54550PWPG4?
All TPS54550PWPG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS54550PWPG4, 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 TPS54550PWPG4 part is unused and in its original packaging.
Return procedure for TPS54550PWPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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