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Texas Instruments TPS54328DRCT
- Part No.:
- TPS54328DRCT
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS54328DRCT.pdf
- Description:
- IC REG BUCK ADJ 3A 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:486
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Product details
Overview
TPS54328DRCT 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. It delivers stable power in digital TV, Blu-ray player, and STB power rails.
For engineers reviewing the TPS54328DRCT datasheet, TPS54328DRCT pinout, TPS54328DRCT application, or TPS54328DRCT equivalent, key selection criteria include input voltage range (4.5–18 V), thermal performance in VSON-10 package, soft-start adjustability, cycle-by-cycle overcurrent protection, and compatibility with ceramic output capacitors.
Technical Context
The TPS54328DRCT 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 voltage variations.
Eco-Mode™ enables automatic transition from continuous conduction mode (CCM) to discontinuous conduction mode (DCM) at light loads, reducing switching losses. Proprietary circuitry supports both ultra-low-ESR ceramic and polymer capacitors without requiring ESR-induced ripple for stability.
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 - sufficient for powering SoCs, FPGAs, and memory subsystems in embedded video applications. |
| Switching Frequency | 700 kHz - enables compact magnetics and balances EMI vs. efficiency trade-offs in space-constrained designs. |
| High-Side RDS(on) | 100 mΩ - reduces conduction loss at high duty cycles; optimized for lower-VOUT applications like 1.05 V core supplies. |
| Low-Side RDS(on) | 70 mΩ - minimizes freewheeling loss during DCM and improves light-load efficiency via Eco-Mode™. |
| Feedback Reference | 0.765 V ±12 mV - enables precise output regulation down to sub-1 V with standard resistor dividers. |
| Shutdown Current | <10 µA - ensures minimal standby power draw in always-on consumer electronics. |
Pinout & Package
The TPS54328DRCT uses a 10-pin VSON (DRC) package measuring 3.0 mm × 3.0 mm with exposed thermal pad (PGND). Thermal pad must be soldered to PCB ground plane for reliable 3-A operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 EN | Enable input | Active-high logic control; threshold 1.6 V high, 0.45 V low - compatible with 3.3 V and 5 V microcontrollers. |
| 2 VFB | Feedback input | Monitors output via resistor divider; 0.765 V reference enables accurate regulation of 1.05 V, 1.2 V, 1.8 V, etc. |
| 3 VREG5 | Internal LDO output | 5.5 V ±0.3 V regulated supply for gate drive; requires 1 µF ceramic capacitor to GND; inactive when EN = low. |
| 4 SS | Soft-start control | Capacitor-connected node; 2 µA charge current enables programmable startup ramp - prevents inrush and supports pre-biased outputs. |
| 5 GND | Signal ground | Reference return for VFB and SS; must connect to single-point ground near thermal pad to minimize noise coupling. |
| 6 SW | Switch node | Connection between internal high- and low-side FETs; drives external inductor; requires tight layout and Kelvin connection to minimize ringing. |
| 7 VBST | Bootstrap supply | Charged via internal diode from VREG5; requires 0.1 µF ceramic capacitor to SW - enables high-side FET gate drive above VIN. |
| 8–9 VIN | Power input | Dual-input pins reduce trace resistance and improve current sharing; accepts 4.5–18 V with 20 V absolute max rating. |
| 10 Exposed Pad | PGND thermal pad | Power ground return for low-side FET; must be soldered to large copper area for thermal dissipation and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ adaptive on-time control | Enables zero-external-compensation design with <10 µs load-step response and stable operation with ceramic capacitors. |
| Eco-Mode™ auto-skip operation | Reduces quiescent current to <10 µA at light loads while maintaining regulation - extends battery life in standby modes. |
| Integrated 100 mΩ / 70 mΩ FETs | Eliminates external power switches and associated gate drivers; simplifies BOM and improves thermal performance in 3 mm × 3 mm footprint. |
| Pre-biased soft start | Prevents reverse current flow during startup into pre-charged outputs - critical for hot-swap and multi-rail sequencing applications. |
| Cycle-by-cycle overcurrent protection | Detects valley current on low-side FET; non-latching shutdown at 3.5–5.7 A - protects against short-circuit and overload without latch-up. |
Applications
| Digital TV Power Supply | Blu-ray Disc™ Player |
|---|---|
Use Scenario: Powers main SoC, DDR memory, and HDMI interface from 12 V input rail under dynamic video decoding loads. IC Role / Device Role / Timing Role: Primary 1.05 V/3 A buck regulator delivering clean, low-noise core voltage with fast transient recovery. Use Value: D-CAP2™ control maintains <50 mVpp output ripple during 2.25 A load steps, eliminating need for bulk electrolytic capacitors. | Use Scenario: Supplies 1.2 V processor core and 3.3 V peripheral rails in compact optical disc playback units. IC Role / Device Role / Timing Role: High-efficiency synchronous buck converter operating in Eco-Mode™ during menu navigation idle periods. Use Value: Achieves >85% efficiency at 100 mA load due to 70 mΩ low-side FET and adaptive skip mode. |
| Networking Home Terminal | Digital Set Top Box (STB) |
Use Scenario: Regulates 1.8 V FPGA I/O bank and 5 V USB PHY from shared 12 V wall adapter input. IC Role / Device Role / Timing Role: Dual-output-capable buck controller (with external feedback resistors) supporting multiple voltage domains. Use Value: Adjustable soft start prevents brownout during simultaneous power-up of Ethernet PHY and Wi-Fi module. | Use Scenario: Provides 1.05 V/3 A core supply for broadcast demodulator ICs with strict EMI limits in living-room environments. IC Role / Device Role / Timing Role: Synchronous step-down converter with 700-kHz fixed-frequency operation for predictable EMI filtering. Use Value: VSON-10 package with thermal pad meets thermal derating requirements at 85°C ambient without heatsink. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54327DRCT | Same 3-A rating and D-CAP2™ control, but 4.5–28 V input range and no VREG5 LDO output. | Better suited for higher-input industrial systems; lacks integrated 5.5 V bias rail for external gate drivers. | Select TPS54327DRCT only if input exceeds 18 V or VREG5 is unused; otherwise TPS54328DRCT provides superior integration. |
| MP2332HG-LED-Z | 3-A synchronous buck with 4.5–28 V input, but uses current-mode control and lacks Eco-Mode™. | Higher light-load quiescent current (~30 µA); requires external compensation network. | Choose MP2332HG-LED-Z only if 28 V max input is required and D-CAP2™ simplicity is not critical. |
Compared with TPS54327DRCT and MP2332HG-LED-Z, the TPS54328DRCT uniquely combines 4.5–18 V operation, integrated VREG5 LDO, Eco-Mode™, and D-CAP2™ zero-compensation architecture - making it optimal for cost-sensitive, space-constrained consumer video power supplies.
Availability
TPS54328DRCT is available at Aetrix Electronics and suitable for digital TV power supplies, Blu-ray player designs, and STB manufacturing requiring stable component supply and long-term production continuity.
Supply support for TPS54328DRCT 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 TPS54328DRCT belongs to TI's D-CAP2™ synchronous buck converter family, designed specifically for low-voltage, high-current consumer electronics power rails where small size, fast transient response, and light-load efficiency are critical.
FAQ
What is the maximum input voltage rating for the TPS54328DRCT?
The TPS54328DRCT has an absolute maximum input voltage rating of 20 V on the VIN pin. Its recommended operating input range is 4.5 V to 18 V. Exceeding 20 V risks permanent damage per the Absolute Maximum Ratings table in the datasheet. The device includes undervoltage lockout (UVLO) that activates below ~3.6 V on the VREG5 pin to prevent erratic startup.
Does the TPS54328DRCT support pre-biased output startup?
Yes, the TPS54328DRCT supports pre-biased soft start. Its internal circuitry detects when the feedback voltage (VFB) exceeds the soft-start command level and gradually ramps up low-side FET conduction to avoid sinking current from a pre-charged output. This feature is confirmed in Section 7.3.4 of the datasheet and is essential for hot-swap and multi-rail sequencing applications.
What package type and thermal characteristics does the TPS54328DRCT use?
The TPS54328DRCT uses a 10-pin VSON (DRC) package measuring 3.0 mm × 3.0 mm with an exposed thermal pad connected to PGND. Its junction-to-board thermal resistance (RθJB) is 18.9°C/W, enabling 3 A operation at 85°C ambient when properly soldered to ≥100 mm² of 2-oz copper. The thermal pad must be connected to PCB ground for both thermal and EMI performance.
Can the TPS54328DRCT operate with ceramic output capacitors only?
Yes, the TPS54328DRCT is explicitly designed for ceramic output capacitors. Its D-CAP2™ control architecture eliminates reliance on ESR-induced ripple for loop stability, and the datasheet recommends 22 µF to 68 µF ceramic capacitors (e.g., X5R/X7R) with typical ESR ≤2 mΩ. This allows full elimination of electrolytic or POSCAP output capacitors in space-constrained designs.
What is the purpose of the VREG5 pin on the TPS54328DRCT?
The VREG5 pin on the TPS54328DRCT provides a regulated 5.5 V ±0.3 V output used to power the internal high-side gate driver and optionally external circuitry. It sources up to 10 mA and requires a 1 µF ceramic capacitor to GND. VREG5 is disabled when EN is low, and its voltage is monitored for UVLO protection - ensuring safe startup only when sufficient input voltage is present.
TPS54328DRCT 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)
TPS54328DRCT FAQ
1.How can I place an order for TPS54328DRCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54328DRCT 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 TPS54328DRCT reliable?
The price and inventory of TPS54328DRCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54328DRCT is usually 5 days.
3.What payment methods are accepted for TPS54328DRCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54328DRCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54328DRCT?
TPS54328DRCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54328DRCT 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 TPS54328DRCT?
For technical support, including TPS54328DRCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54328DRCT requirements.
6.How does Aetrix verify that TPS54328DRCT is sourced from the original manufacturer or authorized distributors?
All TPS54328DRCT 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 TPS54328DRCT meets industry standards.
7.What is the process for return or replacement of TPS54328DRCT?
All TPS54328DRCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS54328DRCT, 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 TPS54328DRCT part is unused and in its original packaging.
Return procedure for TPS54328DRCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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