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Texas Instruments TPS54328DRCR
- Part No.:
- TPS54328DRCR
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS54328DRCR.pdf
- Description:
- IC REG BUCK ADJ 3A 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,958
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Product details
Overview
TPS54328DRCR from Texas Instruments is a 3-A synchronous step-down DC/DC converter with D-CAP2™ adaptive on-time control, integrated 100 mΩ high-side and 70 mΩ low-side N-channel MOSFETs, 700-kHz switching frequency, Eco-Mode™ for light-load efficiency, and 0.76 V to 7 V adjustable output voltage - used in digital TV power supplies and networking home terminals.
For engineers reviewing the TPS54328DRCR datasheet, TPS54328DRCR pinout, TPS54328DRCR application, or TPS54328DRCR equivalent, key selection considerations include input voltage range (4.5–18 V), thermal performance in the 3.0 mm × 3.0 mm VSON package, soft-start adjustability, cycle-by-cycle overcurrent protection, and compatibility with ceramic output capacitors.
Technical Context
The TPS54328DRCR implements D-CAP2™ mode control using adaptive on-time PWM, eliminating external compensation while enabling fast transient response. Its internal one-shot timer sets on-time based on VIN and VOUT to maintain pseudo-constant 700-kHz operation across input and load variations.
Eco-Mode™ enables automatic transition from continuous conduction mode (CCM) to discontinuous conduction mode (DCM) at light loads, reducing switching losses. The device integrates UVLO (3.45–4.05 V), non-latching thermal shutdown (165°C), and valley-current-based cycle-by-cycle overcurrent protection with dual OCL thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports wide industrial and consumer input rails including 5 V, 12 V, and 15 V bus systems. |
| Output Current | 3 A continuous - delivers full rated current with thermal derating per RθJB = 18.9°C/W in VSON package. |
| Switching Frequency | 700 kHz - fixed-frequency operation enables predictable EMI filtering and compact magnetics design. |
| High-Side RDS(on) | 100 mΩ - minimizes conduction loss at high duty cycles; optimized for lower-VOUT applications. |
| Low-Side RDS(on) | 70 mΩ - reduces conduction loss during freewheeling phase; improves efficiency at medium-to-high loads. |
| Feedback Reference | 765 mV ±16 mV - precise bandgap reference enables accurate output regulation across temperature and line. |
| Shutdown Current | <10 µA - ensures ultra-low system standby power in always-on applications. |
Pinout & Package
TPS54328DRCR uses a 10-pin VSON (DRC) package measuring 3.00 mm × 3.00 mm with exposed thermal pad (PGND). The package supports high-power density PCB layouts and requires soldering of the thermal pad to a dedicated PGND copper area for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable input | Active-high logic control; threshold 1.6 V (min), 0.45 V (max); enables/disable converter with hysteresis. |
| VIN (Pins 9,10) | Input supply | Primary power input; accepts 4.5–18 V; requires local 10-µF ceramic + 0.1-µF decoupling. |
| VFB (Pin 2) | Feedback input | Monitors output via resistor divider; 765-mV reference sets VOUT = 0.765 × (1 + R1/R2). |
| VREG5 (Pin 3) | Internal LDO output | 5.5-V regulated supply for gate drive; powers VBST via internal diode; requires 1-µF ceramic to GND. |
| SS (Pin 4) | Soft-start control | Adjustable ramp via external capacitor; 2-µA charge current enables controlled VOUT rise and pre-biased startup. |
| GND (Pin 5) | Analog ground | Signal return for VFB and SS; must be connected at single point near IC to minimize noise coupling. |
| SW (Pins 6,7) | Switch node | Connection between HS and LS FETs; drives external inductor; requires tight layout to reduce EMI and ringing. |
| VBST (Pin 8) | Bootstrap supply | Charged via internal diode from VREG5; requires 0.1-µF ceramic to SW for high-side gate drive. |
| Thermal Pad | Power ground | Exposed bottom pad; must be soldered to PGND plane for thermal dissipation and low-inductance return path. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ Adaptive On-Time Control | Enables zero-external-compensation design with fast transient response (<50 µs recovery for 1-A load step) and stable operation with ceramic output capacitors. |
| Eco-Mode™ Light-Load Efficiency | Automatically enters DCM below ~300 mA load, reducing quiescent current to <10 µA and maintaining >85% efficiency at 10-mA output. |
| Integrated Dual Power FETs | 100 mΩ HS + 70 mΩ LS MOSFETs co-optimized for 0.76–7 V output range, minimizing conduction loss without external drivers. |
| Pre-Biased Soft Start | Prevents reverse current flow during startup into pre-charged outputs by gradually enabling synchronous rectification cycle-by-cycle. |
| Cycle-by-Cycle Overcurrent Protection | Valley-current sensing on low-side FET provides accurate current limiting (3.5–5.7 A typ.) with non-latching fault recovery. |
Applications
| Digital TV Power Supply | Networking Home Terminal |
|---|---|
Use Scenario: Powers SoC core voltage (1.05 V @ 3 A) and memory interface rails in flat-panel TVs with variable input (12 V or PoE-derived 5–18 V). IC Role / Device Role / Timing Role: Primary buck regulator delivering tightly regulated low-voltage rail with fast transient response to handle video processing bursts. Use Value: D-CAP2™ control maintains <50 mV output deviation during 1-A load steps, eliminating need for large bulk capacitance. | Use Scenario: Supplies 1.8 V and 3.3 V rails for Ethernet PHYs, Wi-Fi modules, and microcontrollers in residential gateways and set-top boxes. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter operating across ambient temperatures (–40°C to 85°C) with Eco-Mode™ extending battery backup runtime. Use Value: 700-kHz switching enables small 1.5-µH inductors and 22–68-µF ceramic output caps, reducing board area by >30% vs legacy solutions. |
| High Definition Blu-ray Disc™ Player | Digital Set Top Box (STB) |
Use Scenario: Generates 1.2 V CPU core voltage and 1.8 V I/O voltage from 12 V input in BD players with strict acoustic noise requirements. IC Role / Device Role / Timing Role: Low-noise synchronous buck converter leveraging Eco-Mode™ to eliminate audible switching frequencies at light loads. Use Value: Auto-skip operation suppresses 700-kHz tone under idle conditions, meeting consumer audio noise specifications. | Use Scenario: Provides 5.5 V VREG5-derived auxiliary power and main 1.05 V SoC rail in STBs with multi-rail power sequencing demands. IC Role / Device Role / Timing Role: Dual-role IC supplying both regulated output and internal gate drive (via VREG5/VBST), simplifying BOM and layout. Use Value: Integrated 5.5-V LDO eliminates need for external bias supply, reducing component count and improving reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54327DRCR | Same 10-pin VSON package, identical pinout, but rated for 2.5 A max output current and 120 mΩ/85 mΩ FETs. | Suitable for lower-current applications where thermal margin or cost optimization is prioritized over 3-A capability. | Select when full 3-A output is not required and lower RDS(on) trade-off is acceptable for reduced BOM cost. |
| MP2332HG-10-LF-Z | Monolithic 3-A buck with 700-kHz fixed frequency, but uses voltage-mode control requiring external compensation and lacks Eco-Mode™. | Better suited for designs needing deterministic frequency control and less sensitive to light-load efficiency. | Choose when design requires strict EMI predictability and can accommodate additional compensation components and higher light-load quiescent current. |
Compared with TPS54328DRCR, TPS54327DRCR offers pin-compatible down-rating for cost-sensitive 2.5-A use cases, while MP2332HG-10-LF-Z provides fixed-frequency voltage-mode control at the expense of added external components and reduced light-load efficiency.
Availability
TPS54328DRCR is available at Aetrix Electronics and suitable for digital TV power supplies, networking home terminals, and high-definition Blu-ray Disc™ players requiring stable component supply, long-term production continuity, and automotive-grade reliability validation.
Supply support for TPS54328DRCR 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 technologies, with decades of expertise in high-efficiency DC/DC conversion.
The TPS543xx family was designed specifically for space-constrained, high-efficiency point-of-load applications in consumer electronics, delivering integrated FETs, adaptive control, and robust protection in thermally enhanced packages like the DRC VSON.
FAQ
What is the maximum output current capability of the TPS54328DRCR?
The TPS54328DRCR delivers up to 3 A continuous output current under recommended operating conditions (TA = –40°C to 85°C, proper PCB thermal design). Its current limit is specified at 3.5–5.7 A, and thermal performance is validated with RθJB = 18.9°C/W in the 3.0 mm × 3.0 mm VSON package. Derating applies above 60°C ambient.
Does the TPS54328DRCR support pre-biased output startup?
Yes, the TPS54328DRCR includes proprietary pre-biased soft start. When the output is pre-charged, the controller incrementally enables the low-side FET gate drive on a cycle-by-cycle basis, preventing reverse current flow and ensuring smooth VOUT ramp-up without sinking charge from the pre-biased rail.
What package type and thermal characteristics apply to the TPS54328DRCR?
The TPS54328DRCR uses the 10-pin VSON (DRC) package measuring 3.00 mm × 3.00 mm with an exposed thermal pad. Its junction-to-board thermal resistance is 18.9°C/W, and the thermal pad must be soldered to a PGND copper area to achieve rated performance and prevent thermal shutdown under full load.
How does Eco-Mode™ improve light-load efficiency in the TPS54328DRCR?
Eco-Mode™ in the TPS54328DRCR enables automatic transition from continuous conduction mode (CCM) to discontinuous conduction mode (DCM) as load decreases. This reduces switching losses and lowers quiescent current to <10 µA, maintaining >85% efficiency even at 10-mA output - critical for always-on consumer devices.
Can the TPS54328DRCR operate with ceramic output capacitors?
Yes, the TPS54328DRCR is explicitly designed for ceramic output capacitors. Its D-CAP2™ control architecture includes internal ripple injection to stabilize regulation without requiring ESR-dependent output ripple, enabling use of ultra-low-ESR ceramics (22–68 µF typical) and eliminating POSCAP/SP-CAP dependencies.
TPS54328DRCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP2™, Eco-Mode™
- Package/Case:
- 10-VFDFN Exposed Pad
- 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):
- 18V
- Voltage - Output (Min/Fixed):
- 0.76V
- Voltage - Output (Max):
- 7V
- 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:
- 10-VSON (3x3)
TPS54328DRCR FAQ
1.How can I place an order for TPS54328DRCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54328DRCR 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 TPS54328DRCR reliable?
The price and inventory of TPS54328DRCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54328DRCR is usually 5 days.
3.What payment methods are accepted for TPS54328DRCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54328DRCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54328DRCR?
TPS54328DRCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54328DRCR 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 TPS54328DRCR?
For technical support, including TPS54328DRCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54328DRCR requirements.
6.How does Aetrix verify that TPS54328DRCR is sourced from the original manufacturer or authorized distributors?
All TPS54328DRCR 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 TPS54328DRCR meets industry standards.
7.What is the process for return or replacement of TPS54328DRCR?
All TPS54328DRCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54328DRCR, 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 TPS54328DRCR part is unused and in its original packaging.
Return procedure for TPS54328DRCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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