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Texas Instruments TPS54339DDA
- Part No.:
- TPS54339DDA
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS54339DDA.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:249
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Product details
Overview
TPS54339DDA from Texas Instruments is a 3-A synchronous step-down DC/DC converter with integrated high-side (140 mΩ) and low-side (70 mΩ) N-channel MOSFETs, operating from 4.5 V to 23 V input and delivering adjustable output voltage from 0.76 V to 7 V. It uses D-CAP2™ adaptive on-time control for fast transient response without external compensation, supports ceramic output capacitors, and features pre-biased soft start-used in digital TV power supplies and Blu-ray disc player voltage rails.
For engineers reviewing the TPS54339DDA datasheet, TPS54339DDA pinout, TPS54339DDA application, or TPS54339DDA equivalent, key selection considerations include its 600-kHz pseudo-fixed switching frequency, thermal shutdown at 165°C, cycle-by-cycle overcurrent protection, 5.5-V internal VREG5 regulator, and SO PowerPAD™ (DDA) package with exposed thermal pad for enhanced thermal performance.
Technical Context
The TPS54339DDA implements D-CAP2™ mode control-a proprietary adaptive on-time PWM architecture that combines constant on-time operation with internal ripple injection to enable stability with ultra-low-ESR ceramic output capacitors. Its feedback loop references a 0.765-V bandgap, and the on-time is dynamically adjusted based on VIN and VOUT to maintain ~600 kHz switching across input and load conditions.
Protection functions are tightly integrated: valley-current sensing enables cycle-by-cycle overcurrent limiting; output overvoltage triggers at 125% of setpoint after 1.7× soft-start time; undervoltage lockout monitors VREG5 (3.45–4.05 V threshold); and thermal shutdown activates at 165°C with 40°C hysteresis. The device also provides pre-biased soft start via controlled low-side gate activation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 23 V - supports wide industrial and consumer DC bus inputs including 12 V and 19 V adapter rails. |
| Output Current | 3 A continuous - sufficient for powering SoCs, FPGAs, and memory subsystems in embedded video systems. |
| Switching Frequency | ~600 kHz - fixed-frequency-equivalent operation enables predictable EMI filtering and compact magnetics design. |
| FET RDS(on) | 140 mΩ (HS), 70 mΩ (LS) - optimized conduction loss for 10–30% duty cycles typical in 1.05–3.3 V output applications. |
| VFB Reference | 0.765 V ±15 mV - high-accuracy internal reference enabling precise output regulation with standard resistor dividers. |
| Soft Start | Adjustable via external capacitor - sets ramp time per tSS = (1.1 × CSS) / 6 µA, supporting controlled inrush current management. |
| Shutdown Current | <10 µA - enables ultra-low-power standby in always-on system blocks such as HDMI receiver logic rails. |
Pinout & Package
The TPS54339DDA is housed in an 8-pin SO PowerPAD™ (DDA) package with an exposed thermal pad on the underside, requiring solder connection to PCB ground plane for thermal dissipation (θJB = 29.7°C/W). Pin 1 is VBST; pin 2 is VIN; pin 3 is SW; pin 4 is GND; pin 5 is VFB; pin 6 is VREG5; pin 7 is EN; pin 8 is SS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBST (1) | Bootstrap supply for high-side gate driver | Requires 0.1 µF ceramic capacitor to SW; internal diode connects VREG5 to VBST for startup assist. |
| VIN (2) | Main input power supply | Accepts 4.5–23 V; must be decoupled with ≥10 µF ceramic + 0.1 µF high-frequency bypass near pin. |
| SW (3) | Switch node between HS and LS FETs | High dv/dt node; requires minimal trace area and Kelvin routing to output inductor to reduce EMI. |
| GND (4) | Power ground return | Single-point analog ground tie recommended; thermal pad must be soldered to PGND for thermal integrity. |
| VFB (5) | Feedback input for output voltage regulation | Connects to resistor divider; 0.765 V reference enables accurate setting of 0.76–7 V outputs. |
| VREG5 (6) | 5.5-V internal LDO output | Powers internal circuitry; requires 0.47 µF ceramic cap to GND; inactive when EN = low. |
| EN (7) | Enable control input | Active-high logic; internal 200–800 kΩ pull-down; 1.6 V threshold ensures robust noise immunity. |
| SS (8) | Soft-start timing control | 6 µA internal charge current; external capacitor sets ramp time and enables pre-biased startup. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ adaptive on-time control | Enables stable operation with zero-ESR ceramic output capacitors and eliminates need for external compensation network. |
| Pre-biased soft start | Prevents reverse current flow into pre-charged output by incrementally enabling low-side FET conduction during startup. |
| Integrated 5.5-V VREG5 LDO | Supplies internal bias independently of VIN; reduces external component count and improves light-load efficiency. |
| Cycle-by-cycle overcurrent protection | Detects valley current on low-side FET; non-latching hiccup mode activates after 7 consecutive overcurrent cycles. |
| Thermal shutdown with hysteresis | Shuts down at 165°C junction temperature and remains off until die cools by 40°C, preventing thermal runaway. |
Applications
| Digital TV Power Supply | Blu-ray Disc Player Core Rail |
|---|---|
|
Use Scenario: Supplies 1.05 V @ 3 A to main SoC in 4K UHD television platforms with tight transient requirements. IC Role / Device Role / Timing Role: Primary buck regulator delivering core processor voltage with <100 µs load-step response. Use Value: D-CAP2™ control maintains regulation during rapid SoC activity bursts without output capacitor derating. |
Use Scenario: Powers video decoder ASIC and HDMI transmitter in high-definition optical disc players. IC Role / Device Role / Timing Role: Synchronous step-down converter generating 1.2 V/1.8 V rails from 12 V input. Use Value: Pre-biased soft start prevents disruption of hot-plugged HDMI link during power-up sequences. |
| Networking Home Terminal | Digital Set Top Box (STB) |
|
Use Scenario: Provides 3.3 V @ 2 A to Ethernet PHY and packet processor in residential gateway devices. IC Role / Device Role / Timing Role: High-efficiency intermediate bus converter replacing discrete controller + FET solutions. Use Value: Integrated 140 mΩ/70 mΩ FETs achieve >92% efficiency at full load, reducing board-level heat generation. |
Use Scenario: Generates 5 V and 1.05 V rails for tuner, demodulator, and conditional access module in cable STBs. IC Role / Device Role / Timing Role: Dual-rail power solution using single IC with adjustable VFB divider and VREG5 auxiliary supply. Use Value: VREG5 powers internal logic and can optionally bias external circuits, eliminating need for second LDO. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54337DDA | Same DDA package and pinout; lower 2.5-A rating; 4.5–28 V input; no VREG5 output. | Lacks integrated 5.5-V LDO; requires external bias for control circuitry; suited for space-constrained 2.5-A designs. | Select when VREG5 is not needed and peak current demand stays ≤2.5 A; verify thermal margin with θJA = 49.1°C/W. |
| MP2339DJ-LF-Z | Monolithic 3-A buck; 4.5–26 V input; 0.8–15 V output; 500 kHz fixed frequency; no VREG5 or pre-biased soft start. | Fixed-frequency control requires external compensation; lacks D-CAP2™ transient performance and pre-bias capability. | Choose for cost-sensitive designs where ceramic capacitor compatibility and ultrafast load steps are secondary to BOM simplicity. |
Compared with TPS54339DDA, TPS54337DDA offers identical layout compatibility but reduced current and missing VREG5, while MP2339DJ-LF-Z trades adaptive control and advanced soft start for lower unit cost and simpler loop tuning-making TPS54339DDA optimal for high-transient, pre-biased, or multi-rail systems.
Availability
TPS54339DDA is available at Aetrix Electronics and suitable for digital TV power supplies, Blu-ray disc player core rails, and networking home terminal voltage regulation requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS54339DDA 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 and automotive-grade reliability.
The TPS54339DDA belongs to TI's SWIFT™ synchronous buck converter family, designed specifically for high-density, low-ESR-capacitor-compatible power rails in consumer video, networking, and set-top box applications demanding fast transient response and minimal external components.
FAQ
What is the maximum input voltage rating for the TPS54339DDA?
The TPS54339DDA has an absolute maximum input voltage rating of 25 V on the VIN pin, with recommended operating range from 4.5 V to 23 V. Exceeding 25 V risks permanent damage; transient spikes up to 27 V are allowed for ≤10 ns. For reliable 23 V nominal operation, ensure input filtering suppresses overshoot beyond this limit.
Does the TPS54339DDA support pre-biased output startup?
Yes, the TPS54339DDA implements hardware-based pre-biased soft start. When the output voltage is already present at startup, the device gradually enables low-side FET conduction instead of forcing immediate current sink, preventing reverse current flow and ensuring smooth regulation ramp-up without disrupting downstream circuitry.
What is the purpose of the VREG5 pin on the TPS54339DDA?
The VREG5 pin on the TPS54339DDA delivers a regulated 5.5-V output (typical 5.5 V, min 5.2 V, max 5.7 V) to power internal control circuitry. It is active only when EN is high, requires a 0.47 µF ceramic capacitor to GND, and can optionally supply external bias-eliminating the need for a separate LDO in many designs.
How does the D-CAP2™ control mode improve transient response in the TPS54339DDA?
D-CAP2™ control in the TPS54339DDA uses adaptive on-time modulation with internal ripple injection to achieve inherent stability and sub-100 µs load-step response without external compensation components. This allows direct use of ceramic output capacitors and reduces output capacitance requirements by up to 50% compared to traditional voltage-mode controllers.
What thermal management is required for the TPS54339DDA in continuous 3-A operation?
For continuous 3-A operation, the TPS54339DDA requires its exposed thermal pad to be soldered to a minimum 100 mm² copper pour connected to internal ground planes via ≥4 thermal vias (0.3 mm diameter). With this layout, junction temperature rise remains within specification at ambient ≤60°C; θJB = 29.7°C/W confirms effective board-level heat extraction.
TPS54339DDA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™, D-CAP2™
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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):
- 23V
- Voltage - Output (Min/Fixed):
- 0.76V
- Voltage - Output (Max):
- 7V
- Current - Output:
- 3A
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
TPS54339DDA FAQ
1.How can I place an order for TPS54339DDA through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54339DDA 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 TPS54339DDA reliable?
The price and inventory of TPS54339DDA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54339DDA is usually 5 days.
3.What payment methods are accepted for TPS54339DDA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54339DDA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54339DDA?
TPS54339DDA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54339DDA 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 TPS54339DDA?
For technical support, including TPS54339DDA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54339DDA requirements.
6.How does Aetrix verify that TPS54339DDA is sourced from the original manufacturer or authorized distributors?
All TPS54339DDA 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 TPS54339DDA meets industry standards.
7.What is the process for return or replacement of TPS54339DDA?
All TPS54339DDA units undergo pre-shipment inspection (PSI). If there is an issue with TPS54339DDA, 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 TPS54339DDA part is unused and in its original packaging.
Return procedure for TPS54339DDA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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