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Texas Instruments TPS54326PWPR
- Part No.:
- TPS54326PWPR
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54326PWPR.pdf
- Description:
- IC REG BUCK ADJ 3A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,732
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Product details
Overview
TPS54326PWPR from Texas Instruments is a 3-A synchronous step-down DC/DC converter with integrated high-side (120 mΩ) and low-side (70 mΩ) N-channel MOSFETs, D-CAP2™ adaptive on-time control, and Auto-Skip Eco-mode™ for light-load efficiency. It operates from 4.5 V to 18 V VCC and 2 V to 18 V VIN, delivers adjustable output from 0.76 V to 5.5 V, and targets digital TV, Blu-ray player, and STB power rails.
For engineers reviewing the TPS54326PWPR datasheet, TPS54326PWPR pinout, TPS54326PWPR application, or TPS54326PWPR equivalent, this page delivers verified electrical parameters, HTSSOP-14 package mapping, thermal design guidance, and real-world substitution options - all grounded in TI's SLVSA13E production datasheet and validated operating conditions.
Technical Context
The TPS54326PWPR implements D-CAP2™ mode control using adaptive on-time PWM, where on-time is inversely proportional to VIN and proportional to VO - enabling pseudo-fixed 700 kHz switching without an external oscillator. Its internal ramp compensates for zero-output-ripple ceramic capacitors, eliminating ESR dependency.
It integrates dual current-sense paths for cycle-by-cycle overcurrent protection: valley-current detection during low-side conduction and temperature-compensated voltage sensing across PGND pins. Power good activation occurs after 1.7× soft-start time, with ±10% output window and 10 ms fault delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3 A continuous - supports mid-power system rails without external current boosting |
| Input Voltage Range | 4.5 V–18 V (VCC), 2 V–18 V (VIN) - accommodates wide-input industrial and consumer supplies |
| Output Voltage Range | 0.76 V–5.5 V - programmable via resistor divider for core logic, I/O, and analog rail generation |
| Switching Frequency | ~700 kHz nominal - enables compact magnetics and predictable EMI filtering design |
| FET RDS(on) | 120 mΩ (HS), 70 mΩ (LS) - minimizes conduction loss at 3 A, supporting >90% peak efficiency |
| Light-Load Efficiency | Auto-Skip Eco-mode™ - reduces switching losses below ~300 mA, extending battery runtime |
| Thermal Shutdown | 150°C threshold with 25°C hysteresis - protects against sustained overload or poor PCB heatsinking |
Pinout & Package
TPS54326PWPR uses the 14-pin HTSSOP (PWP) package with exposed PowerPAD™ thermal pad, optimized for surface-mount thermal dissipation via soldered copper plane connection. θJA = 55.6°C/W, θJB = 26.4°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VO (Pin 1) | Output voltage node | Connects directly to output capacitor and feedback divider; used for on-time adjustment |
| VFB (Pin 2) | Feedback input | Monitors regulated output via resistor divider; reference = 0.765 V ±1.5% |
| VREG5 (Pin 3) | 5.5 V LDO output | Powers internal circuitry; requires 1 µF ceramic bypass to PGND |
| SS (Pin 4) | Soft-start control | 2 µA current source charges external capacitor; enables pre-biased startup |
| GND (Pin 5) | Signal ground | Reference for analog blocks; must be star-connected to PGND near IC |
| PG (Pin 6) | Open-drain power good | Asserts high after 1.7× soft-start when VO is within ±10%; sinks 5 mA max |
| EN (Pin 7) | Enable input | Active-high logic; 1.5 V threshold; pulls down to disable and discharge VO |
| PGND1, PGND2 (Pins 8,9) | Power ground returns | Low-side FET sources and current sense inputs; connect directly to PowerPAD™ |
| SW1, SW2 (Pins 10,11) | Switch nodes | High-side drain / low-side source connections; route with minimal loop area |
| VBST (Pin 12) | Bootstrap supply | Charged via internal diode from VREG5; requires 0.1 µF ceramic to SW1/SW2 |
| VIN (Pin 13) | Main power input | Drain of high-side FET; accepts up to 18 V; decouple with ≥10 µF ceramic |
| VCC (Pin 14) | Bias supply input | 4.5–18 V input for control logic; may be tied to VIN if within range |
| PowerPAD™ (Exposed) | Thermal & electrical ground | Mandatory solder connection to PGND plane; primary heat path to PCB |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ adaptive on-time control | Enables stable regulation with ceramic output capacitors and eliminates external compensation |
| Auto-Skip Eco-mode™ | Reduces quiescent current to <10 µA in shutdown and extends light-load efficiency down to 1 mA |
| Integrated 120 mΩ/70 mΩ FETs | Eliminates external MOSFETs and gate drivers; simplifies layout and improves thermal coupling |
| Pre-biased soft start | Prevents reverse current flow during startup when output is pre-charged; avoids bus droop |
| Comprehensive protection suite | Includes cycle-by-cycle OCP, output OVP/UVP (120%/70%), UVLO (3.8 V), and thermal shutdown |
Applications
| Digital TV Power Supply | Blu-ray Disc™ Player |
|---|---|
|
Use Scenario: Powers SoC core, memory, and HDMI interface rails in 4K-capable broadcast receivers. IC Role / Device Role / Timing Role: Primary 1.05 V/3 A buck regulator delivering stable core voltage under dynamic video decoding loads. Use Value: D-CAP2™ fast transient response maintains <±1% output deviation during burst-mode GPU activity. |
Use Scenario: Supplies 1.8 V and 3.3 V rails for BD-ROM controller, audio DAC, and servo motor driver. IC Role / Device Role / Timing Role: Dual-rail generator with independent feedback loops; one TPS54326PWPR per rail. Use Value: Auto-Skip Eco-mode™ achieves >85% efficiency at 50 mA standby, reducing thermal load in sealed enclosures. |
| Home Networking Terminal | Digital Set Top Box (STB) |
|
Use Scenario: Regulates 1.2 V CPU core and 2.5 V PHY rails in DOCSIS 3.1 cable modems with deep-sleep modes. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter enabling rapid wake-from-sleep transitions. Use Value: Pre-biased soft start ensures clean 1.2 V ramp-up without disrupting upstream Ethernet link synchronization. |
Use Scenario: Delivers 5 V USB peripherals, 3.3 V tuner, and 1.0 V FPGA configuration rails in multi-tuner STBs. IC Role / Device Role / Timing Role: Main system PMIC buck stage; coordinated with TPS54326 variants for rail sequencing. Use Value: Power good output enables precise firmware-controlled power-up sequence across three independent domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54327PWPR | Same HTSSOP-14 package, 3-A rating, but wider VIN (4.5–28 V); higher RDS(on) (135/85 mΩ) | Better suited for 24 V industrial input; lower light-load efficiency due to no Eco-mode | Select when input exceeds 18 V and Eco-mode is not required |
| MP2332HGRT-P | 3-A, 4.5–28 V input, 700 kHz, QFN-10; lacks VREG5 output and PG pin | No integrated 5.5 V bias rail or power-good signaling; requires external LDO and monitoring | Choose for space-constrained designs where auxiliary rails and status signals are managed externally |
Compared with TPS54326PWPR, TPS54327PWPR trades Eco-mode efficiency for extended input range, while MP2332HGRT-P reduces footprint and cost at the expense of integrated bias and monitoring functions - making TPS54326PWPR optimal for consumer electronics requiring full-feature integration in HTSSOP.
Availability
TPS54326PWPR is available at Aetrix Electronics and suitable for digital TV, Blu-ray player, and STB power supply designs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS54326PWPR 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-reliability power conversion solutions.
The TPS543xx family was designed specifically for cost-sensitive, high-efficiency point-of-load applications in consumer electronics - emphasizing integration, thermal robustness, and seamless ceramic capacitor compatibility.
FAQ
What is the maximum input voltage the TPS54326PWPR can handle?
The TPS54326PWPR supports a VCC input range of 4.5 V to 18 V and a VIN power input range of 2 V to 18 V. Absolute maximum ratings specify VIN and VCC up to 20 V, but operation above 18 V is not recommended or guaranteed per TI's SLVSA13E datasheet. Exceeding 18 V risks violating recommended operating conditions and may trigger overvoltage protection or damage.
Does the TPS54326PWPR require external compensation components?
No, the TPS54326PWPR does not require external compensation components. Its D-CAP2™ control architecture embeds internal compensation and is explicitly designed to operate stably with ceramic output capacitors - including ultra-low-ESR types - without additional RC networks or type-II/type-III compensators.
How does the TPS54326PWPR manage pre-biased outputs during startup?
The TPS54326PWPR implements pre-biased soft start by detecting when the SS pin voltage exceeds VFB at power-on. It then incrementally increases low-side FET on-time cycle-by-cycle until reaching normal duty-cycle operation - preventing reverse current flow into the pre-charged output and avoiding bus collapse or downstream reset events.
What thermal considerations apply to the TPS54326PWPR in HTSSOP-14 (PWP) package?
The TPS54326PWPR in PWP package requires soldering its exposed PowerPAD™ directly to a PGND copper plane with ≥6 thermal vias. With θJA = 55.6°C/W, maintaining junction temperature ≤125°C at 3 A load demands ≥2 in² of 2-oz copper on inner or bottom layers - verified in TI's layout guidelines and thermal characterization data.
Can the TPS54326PWPR be used with only ceramic output capacitors?
Yes, the TPS54326PWPR is fully compatible with ceramic output capacitors. Its D-CAP2™ control loop includes an internal ripple injection circuit that replaces ESR-dependent stability - allowing stable operation with 22 µF–68 µF X5R/X7R ceramics, as confirmed in TI's recommended design values and Figure 11 ripple measurements.
TPS54326PWPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP2™, Eco-Mode™
- Package/Case:
- 14-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):
- 2V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.76V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 3A
- Frequency - Switching:
- 700kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-HTSSOP
TPS54326PWPR FAQ
1.How can I place an order for TPS54326PWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54326PWPR 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 TPS54326PWPR reliable?
The price and inventory of TPS54326PWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54326PWPR is usually 5 days.
3.What payment methods are accepted for TPS54326PWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54326PWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54326PWPR?
TPS54326PWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54326PWPR 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 TPS54326PWPR?
For technical support, including TPS54326PWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54326PWPR requirements.
6.How does Aetrix verify that TPS54326PWPR is sourced from the original manufacturer or authorized distributors?
All TPS54326PWPR 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 TPS54326PWPR meets industry standards.
7.What is the process for return or replacement of TPS54326PWPR?
All TPS54326PWPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54326PWPR, 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 TPS54326PWPR part is unused and in its original packaging.
Return procedure for TPS54326PWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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