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Texas Instruments TPS54339EDDA
- Part No.:
- TPS54339EDDA
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS54339EDDA.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:1,805
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Product details
Overview
TPS54339EDDA 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, D-CAP2™ adaptive on-time control, 600-kHz pseudo-fixed switching frequency, and Eco-mode™ for light-load efficiency. It operates from 4.5 V to 23 V input and delivers adjustable output voltage from 0.76 V to 7.0 V, supporting digital TV power supplies and networking terminal applications.
For engineers reviewing the TPS54339EDDA datasheet, TPS54339EDDA pinout, TPS54339EDDA application, or TPS54339EDDA equivalent, key selection considerations include its D-CAP2™ transient response, pre-biased soft-start capability, cycle-by-cycle overcurrent protection, thermal shutdown at 165°C, and compatibility with ceramic output capacitors down to 22 µF.
Technical Context
The TPS54339EDDA implements D-CAP2™ mode control using an adaptive on-time PWM architecture that eliminates external compensation while maintaining stability with ultra-low-ESR ceramic output capacitors. Its internal one-shot timer sets on-time inversely proportional to VIN and proportional to VOUT, enabling pseudo-constant 600-kHz operation across input voltage range.
Eco-mode™ enables discontinuous conduction mode at light loads, reducing quiescent current to ≤10 µA in shutdown and sustaining >85% efficiency at 30 mA output. Protection includes valley-current-based OCP, non-latching 125% overvoltage detection, 65% undervoltage hiccup, and thermal shutdown with 40°C hysteresis.
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 24 V rails. |
| Output Current | 3 A continuous - sufficient for powering SoCs, FPGAs, and DDR memory subsystems. |
| Switching Frequency | 600 kHz - enables compact magnetics and predictable EMI profile without external clock synchronization. |
| Feedback Reference | 0.765 V ±1.7% - enables precise output regulation with standard resistor dividers and minimizes divider current error. |
| High-Side RDS(on) | 140 mΩ - reduces conduction loss at high duty cycles, improving efficiency in 3.3 V–5 V output configurations. |
| Low-Side RDS(on) | 70 mΩ - lowers synchronous rectification loss during light-to-moderate load conditions. |
| Shutdown Current | ≤10 µA - meets stringent system-level standby power budgets in always-on consumer electronics. |
Pinout & Package
The TPS54339EDDA uses an 8-pin SO PowerPAD™ (DDA) package with exposed thermal pad soldered to PCB ground for enhanced thermal dissipation (θJA = 46.2°C/W). The package is RoHS-compliant, lead-free (NiPdAu), and rated MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBST (Pin 1) | Bootstrap supply for high-side gate driver | Requires 0.1 µF ceramic capacitor between VBST and SW; internal diode connects VREG5 to VBST for startup assist. |
| VIN (Pin 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 (Pin 3) | Switch node | Connects internal high- and low-side FETs; critical high-di/dt node requiring minimal trace area and Kelvin feedback routing. |
| GND (Pin 4) | Power ground return | Single-point analog/power ground tie point; thermal pad must be soldered directly to PGND plane. |
| VFB (Pin 5) | Feedback input | Monitors output via resistor divider; 0.765 V reference enables accurate VOUT programming with 1% resistors. |
| VREG5 (Pin 6) | Internal 5.5 V LDO output | Powers internal circuitry; requires 0.47 µF ceramic capacitor to GND; inactive when EN = low. |
| EN (Pin 7) | Enable control input | Active-high logic; 1.6 V threshold ensures robust noise immunity; internal 200–800 kΩ pull-down enables default disable. |
| SS (Pin 8) | Soft-start timing control | 6 µA current source charges external capacitor; enables adjustable ramp time and pre-biased startup without output sinking. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ Adaptive On-Time Control | Enables zero-external-compensation design with fast transient response (<10 µs) and stable operation using ceramic output capacitors as low as 22 µF. |
| Eco-mode™ Light-Load Operation | Reduces switching frequency and enters discontinuous conduction mode below ~300 mA, maintaining >85% efficiency at 30 mA output. |
| Pre-Biased Soft Start | Prevents reverse current flow during startup into pre-charged outputs by incrementally enabling low-side FET gate drive until full duty cycle is reached. |
| Cycle-by-Cycle Overcurrent Protection | Monitors low-side FET voltage during conduction; triggers hiccup mode after 7 consecutive overcurrent cycles, limiting peak inductor current to 4.1 A typical. |
| Integrated Thermal Pad (PowerPAD™) | Exposed copper pad on underside of DDA package provides direct thermal path to PCB; requires ≥4 thermal vias to inner ground plane for optimal θJA. |
Applications
| Digital TV Power Supply | Networking Home Terminal |
|---|---|
Use Scenario: Powers main SoC, video decoder, and HDMI interface in 4K UHD television platforms with strict standby power limits. IC Role / Device Role / Timing Role: Primary 1.05 V/3 A buck regulator delivering clean, low-noise core voltage with <20 mV ripple under dynamic load steps. Use Value: D-CAP2™ control maintains regulation during rapid CPU/GPU load transients without external compensation, reducing BOM count by two capacitors and one resistor. | Use Scenario: Supplies 3.3 V rail for Ethernet PHY, Wi-Fi module, and USB controller in residential gateway devices operating 24/7. IC Role / Device Role / Timing Role: High-efficiency intermediate bus converter enabling >90% efficiency at full load and <10 µA shutdown current for Energy Star compliance. Use Value: Eco-mode™ extends battery backup runtime during AC brownouts and reduces thermal stress on densely packed PCBs. |
| High Definition Blu-ray Disc™ Player | Digital Set Top Box (STB) |
Use Scenario: Generates 1.2 V core voltage for BD-ROM controller ASIC and 5 V for servo motor drivers in optical disc players. IC Role / Device Role / Timing Role: Dual-rail support via single IC (using VREG5 for auxiliary 5 V generation) simplifies power tree and improves layout density. Use Value: Pre-biased soft start prevents output voltage collapse during hot-plug insertion of disc trays, avoiding system reset events. | Use Scenario: Delivers 1.8 V and 3.3 V rails for QAM demodulator, MPEG decoder, and front-panel display in cable/satellite STBs. IC Role / Device Role / Timing Role: Synchronous buck with integrated FETs replaces discrete controller + external MOSFET solution, reducing footprint by 40%. Use Value: 600-kHz fixed-frequency operation enables predictable EMI filtering and avoids interference with RF tuner bands. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54337DDAR | Same DDA package, 4.5–28 V input, 3-A rating, but uses D-CAP3™ control and lacks pre-biased soft start. | Higher input voltage ceiling (28 V vs 23 V); no hiccup-mode UVLO recovery-requires external reset for sustained undervoltage. | Choose for wider VIN range where pre-bias startup is not required and higher UVLO threshold is acceptable. |
| MP2339DJ-LF-Z | Monolithic 3-A buck with 4.5–28 V input, 600-kHz fixed frequency, but uses voltage-mode control and requires external compensation. | No Eco-mode™ or D-CAP2™ transient optimization; higher BOM count due to compensation network and larger output capacitance (≥47 µF). | Choose when design reuse of existing voltage-mode layout is prioritized over efficiency optimization at light loads. |
Compared with TPS54339EDDA, TPS54337DDAR offers extended input range but sacrifices pre-biased startup and hiccup-mode UVLO recovery, while MP2339DJ-LF-Z requires external compensation and delivers lower light-load efficiency-making TPS54339EDDA optimal for space-constrained, transient-sensitive consumer power rails.
Availability
TPS54339EDDA is available at Aetrix Electronics and suitable for digital TV power supplies, networking home terminals, high-definition Blu-ray Disc™ players, and digital set-top boxes requiring stable component supply across long production lifecycles.
Supply support for TPS54339EDDA 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 over 90 years of innovation in high-reliability silicon solutions.
The TPS54339E product line delivers highly integrated, low-external-component synchronous buck converters optimized for cost-sensitive, space-constrained consumer electronics requiring fast transient response and ultra-low standby power.
FAQ
What is the maximum input voltage rating for the TPS54339EDDA?
The TPS54339EDDA has an absolute maximum input voltage rating of 25 V on the VIN pin, but its recommended operating input voltage range is 4.5 V to 23 V per the datasheet. Exceeding 23 V may degrade long-term reliability or trigger overvoltage protection on internal circuits such as VREG5, which has a separate 29 V absolute max rating. Always maintain design margin below absolute maximums for safety-critical applications.
Does the TPS54339EDDA support pre-biased output startup?
Yes, the TPS54339EDDA supports pre-biased soft start through proprietary internal circuitry that incrementally enables low-side FET gate drive during startup. This prevents reverse current flow into a pre-charged output, ensuring smooth ramp-up without output voltage collapse. The feature is enabled automatically when the SS pin voltage exceeds the feedback voltage (VFB), and no external components are required to activate it.
What is the purpose of the VREG5 pin on the TPS54339EDDA?
The VREG5 pin on the TPS54339EDDA provides a regulated 5.5 V output (typical 5.5 V, min 5.2 V, max 5.7 V) used to power internal circuitry and optionally supply auxiliary 5 V rails. It is active only when EN is high, draws up to 10 mA, and requires a 0.47 µF ceramic capacitor to GND. An internal diode connects VREG5 to VBST, aiding bootstrap capacitor charging during startup.
How does Eco-mode™ improve efficiency in the TPS54339EDDA at light loads?
Eco-mode™ in the TPS54339EDDA improves light-load efficiency by automatically transitioning from continuous conduction mode (CCM) to discontinuous conduction mode (DCM) when output current drops below ~300 mA. In DCM, the low-side FET turns off when inductor current reaches zero, eliminating reverse recovery losses and reducing switching activity-lowering quiescent current to ≤10 µA in shutdown and sustaining >85% efficiency at 30 mA output.
What thermal management requirements apply to the TPS54339EDDA's exposed PowerPAD™?
TPS54339EDDA's exposed thermal pad (PowerPAD™) must be soldered directly to a PCB ground plane with ≥4 thermal vias (0.3 mm diameter minimum) connecting to inner-layer ground planes. The datasheet specifies θJA = 46.2°C/W for the DDA package-achievable only with proper pad layout. Failure to solder the pad results in thermal derating exceeding 50°C/W and potential thermal shutdown under 2 A load at 85°C ambient.
TPS54339EDDA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™, D-CAP2™, Eco-Mode™
- 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
TPS54339EDDA FAQ
1.How can I place an order for TPS54339EDDA through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54339EDDA 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 TPS54339EDDA reliable?
The price and inventory of TPS54339EDDA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54339EDDA is usually 5 days.
3.What payment methods are accepted for TPS54339EDDA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54339EDDA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54339EDDA?
TPS54339EDDA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54339EDDA 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 TPS54339EDDA?
For technical support, including TPS54339EDDA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54339EDDA requirements.
6.How does Aetrix verify that TPS54339EDDA is sourced from the original manufacturer or authorized distributors?
All TPS54339EDDA 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 TPS54339EDDA meets industry standards.
7.What is the process for return or replacement of TPS54339EDDA?
All TPS54339EDDA units undergo pre-shipment inspection (PSI). If there is an issue with TPS54339EDDA, 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 TPS54339EDDA part is unused and in its original packaging.
Return procedure for TPS54339EDDA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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