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Texas Instruments TPS54339EDDAR
- Part No.:
- TPS54339EDDAR
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS54339EDDAR.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:4,191
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Product details
Overview
TPS54339EDDAR 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 7.0 V. It employs D-CAP2™ adaptive on-time control for fast transient response and supports ceramic output capacitors in digital TV, Blu-ray player, and STB power supplies.
For engineers reviewing the TPS54339EDDAR datasheet, TPS54339EDDAR pinout, TPS54339EDDAR application, or TPS54339EDDAR equivalent, key selection criteria include Eco-mode™ light-load efficiency (<10 µA shutdown current), 600-kHz switching frequency, cycle-by-cycle overcurrent protection, thermal shutdown at 165°C, and SO PowerPAD™ (DDA) package thermal performance.
Technical Context
The TPS54339EDDAR implements D-CAP2™ mode control combining adaptive on-time PWM with internal pseudo-compensation, enabling stable operation with ultra-low-ESR ceramic capacitors without external compensation components. Its one-shot timer sets on-time inversely proportional to VIN and proportional to VOUT, maintaining ~600 kHz pseudo-fixed frequency across input and load ranges.
Eco-mode™ enables automatic transition from continuous conduction mode (CCM) to discontinuous conduction mode (DCM) below ~300 mA load, reducing switching losses while retaining regulation. Pre-biased soft-start prevents output sinking during startup, and valley-current-based OCP provides cycle-by-cycle current limiting with hiccup-mode recovery under sustained overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 23 V - supports wide industrial and consumer input rails including 5 V, 12 V, and 19 V adapters. |
| Output Current | 3 A continuous - sufficient for core logic rails in set-top boxes and media processors. |
| Switching Frequency | 600 kHz - balances EMI, size, and efficiency; fixed by adaptive on-time, not oscillator. |
| FET RDS(on) | 140 mΩ (HS) / 70 mΩ (LS) - enables high efficiency at 3 A with minimal conduction loss. |
| VFB Reference | 0.765 V ±13 mV - sets output accuracy; used with resistor divider to program 0.76–7.0 V range. |
| Shutdown Current | <10 µA - ensures ultra-low system standby power in always-on consumer devices. |
| Thermal Shutdown | 165°C threshold with 40°C hysteresis - protects against PCB-level thermal runaway in enclosed enclosures. |
Pinout & Package
The TPS54339EDDAR 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 thermal pad must be connected to a dedicated GND copper plane via ≥4 thermal vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBST (Pin 1) | Bootstrap supply | Drives high-side gate; requires 0.1 µF ceramic capacitor between VBST and SW for proper level-shifting. |
| VIN (Pin 2) | Main input supply | Accepts 4.5–23 V; powers internal circuitry and high-side driver; bypass with ≥10 µF ceramic capacitor. |
| SW (Pin 3) | Switch node | Connects between internal HS and LS FETs; critical high-dI/dt node requiring minimized trace area and Kelvin feedback routing. |
| GND (Pin 4) | Power ground | Return for switching current; must tie analog ground (SS/VFB) at single point near this pin to avoid noise coupling. |
| VFB (Pin 5) | Feedback input | Monitors output via resistor divider; 0.765 V reference enables precise output programming and stability with ceramic caps. |
| VREG5 (Pin 6) | 5.5 V LDO output | Provides regulated bias for external circuits; requires 0.47 µF ceramic cap to GND; inactive when EN = low. |
| EN (Pin 7) | Enable control | Active-high logic input (1.6 V threshold); internal 200–800 kΩ pull-down allows direct MCU GPIO control. |
| SS (Pin 8) | Soft-start timing | 6 µA current source charges external capacitor; controls ramp rate of output voltage to prevent inrush and overshoot. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ Adaptive On-Time Control | Eliminates need for external compensation components and enables stable regulation with ceramic output capacitors down to 22 µF. |
| Eco-mode™ Light-Load Operation | Reduces quiescent current to <10 µA at no load while maintaining regulation, extending battery life in standby modes. |
| Pre-Biased Soft-Start | Prevents reverse current flow into pre-charged outputs by gradually enabling synchronous rectification during startup. |
| Cycle-by-Cycle Overcurrent Protection | Detects low-side FET voltage during conduction to limit peak inductor current to 3.5–5.7 A, preventing thermal stress under short-circuit. |
| Integrated Thermal Pad (PowerPAD™) | Exposed copper pad on bottom surface enables direct PCB heat sinking, lowering junction temperature rise by >30% vs. standard SOIC. |
Applications
| Digital TV Power Supply | High Definition Blu-ray Disc™ Player |
|---|---|
Use Scenario: Supplies 1.05 V/3 A core voltage to MPEG decoder SoC and 3.3 V/2 A I/O rail from 12 V input. IC Role / Device Role / Timing Role: Primary buck regulator delivering tightly regulated, low-noise power with fast transient response to handle video decode bursts. Use Value: D-CAP2™ control reduces required output capacitance by 40% versus traditional PWM, saving board space and cost. | Use Scenario: Powers laser diode driver, servo controller, and HDMI PHY from 19 V adapter in compact optical drive enclosure. IC Role / Device Role / Timing Role: Main DC/DC converter managing dynamic load steps up to 2 A/µs during disc spin-up and seek operations. Use Value: Eco-mode™ maintains >85% efficiency at 50 mA standby, meeting Energy Star® requirements for idle power. |
| Networking Home Terminal | Digital Set Top Box (STB) |
Use Scenario: Generates 1.2 V/2.5 A CPU core rail and 1.8 V/1.5 A memory rail from PoE-derived 48 V–5 V intermediate bus. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator handling bursty packet processing loads with minimal thermal derating. Use Value: 140 mΩ/70 mΩ FETs achieve 92% peak efficiency at 12 V input, reducing heatsink requirements in fanless designs. | Use Scenario: Delivers 5 V/2 A for tuner and demodulator, plus 3.3 V/1.2 A for conditional access module from 12 V wall adapter. IC Role / Device Role / Timing Role: Dual-rail power manager supporting hot-plug CA modules and RF front-end sequencing. Use Value: Adjustable soft-start (via SS pin) prevents inrush-induced brownout on shared 12 V input during cold boot. |
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, but 2.5 A output and 150 mΩ/80 mΩ FETs; lacks VREG5 output. | Suitable for lower-current applications where auxiliary 5.5 V bias rail is unnecessary. | Select when output current ≤2.5 A and no VREG5 is needed; saves BOM cost but sacrifices headroom and bias capability. |
| MP2339DJ-LF-Z | Monolithic 3 A buck, 4.5–28 V input, 600 kHz, but uses voltage-mode control and requires external compensation. | Better suited for designs needing programmable frequency or tighter EMI control via external sync. | Choose when design requires synchronization to system clock or when ceramic-cap stability with voltage-mode is verified. |
Compared with TPS54339EDDAR, TPS54337DDAR offers lower cost and identical footprint but reduced current capability and missing VREG5, while MP2339DJ-LF-Z trades D-CAP2™ simplicity for greater flexibility in loop tuning and EMI management.
Availability
TPS54339EDDAR is available at Aetrix Electronics and suitable for digital TV power supplies, Blu-ray player subsystems, and STB mainboard designs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production lots.
Supply support for TPS54339EDDAR 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 TPS54339E product line delivers cost-optimized, integrated synchronous buck converters for consumer electronics power rails, emphasizing ease of use, ceramic-cap compatibility, and Eco-mode™ efficiency across light-to-full load conditions.
FAQ
What is the maximum recommended input voltage for the TPS54339EDDAR?
The absolute maximum VIN rating for the TPS54339EDDAR is 25 V, but the recommended operating range is 4.5 V to 23 V per TI's datasheet. Exceeding 23 V risks violating safe operating area limits for internal FETs and may trigger UVLO or thermal shutdown. For 24 V nominal systems, a front-end clamp or pre-regulator is advised before the TPS54339EDDAR input.
Does the TPS54339EDDAR support pre-biased output startup?
Yes, the TPS54339EDDAR includes hardware-based pre-biased soft-start. When the output is already charged above the target voltage at enable, the controller delays activation of the low-side FET and incrementally increases its on-time cycle-by-cycle until reaching normal DCM/CVM operation-preventing reverse current and ensuring monotonic ramp-up of TPS54339EDDAR's output voltage.
How does the TPS54339EDDAR achieve stability with ceramic output capacitors?
The TPS54339EDDAR achieves ceramic-cap stability via D-CAP2™ mode control, which embeds internal pseudo-compensation and adds a controlled ramp to the reference voltage to simulate ripple. This eliminates reliance on ESR-induced output ripple for loop stability-enabling use of 22–68 µF X5R/X7R ceramics without external RC networks or compensation components.
What thermal management is required for the TPS54339EDDAR at full 3-A load?
At 3 A and 12 V input → 1.05 V output, the TPS54339EDDAR dissipates ~1.2 W. To maintain TJ < 125°C in a 60°C ambient, the PCB must provide ≤35°C/W total thermal resistance. This requires soldering the exposed thermal pad to ≥1 cm² internal GND plane with ≥4 × 0.3 mm vias, plus optional top-side copper fill around the DDA package per TI's PowerPAD™ layout guidelines.
Can the TPS54339EDDAR's switching frequency be adjusted externally?
No, the TPS54339EDDAR does not support external frequency adjustment. Its 600-kHz switching frequency results from adaptive on-time control-calculated dynamically as tON ∝ VOUT/VIN. While fSW varies slightly with input/output conditions (±5% typical), it is not user-programmable. For adjustable frequency, consider TI's TPS54340 or MPQ4420A alternatives.
TPS54339EDDAR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™, D-CAP2™, Eco-Mode™
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm 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):
- 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
TPS54339EDDAR FAQ
1.How can I place an order for TPS54339EDDAR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54339EDDAR 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 TPS54339EDDAR reliable?
The price and inventory of TPS54339EDDAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54339EDDAR is usually 5 days.
3.What payment methods are accepted for TPS54339EDDAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54339EDDAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54339EDDAR?
TPS54339EDDAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54339EDDAR 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 TPS54339EDDAR?
For technical support, including TPS54339EDDAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54339EDDAR requirements.
6.How does Aetrix verify that TPS54339EDDAR is sourced from the original manufacturer or authorized distributors?
All TPS54339EDDAR 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 TPS54339EDDAR meets industry standards.
7.What is the process for return or replacement of TPS54339EDDAR?
All TPS54339EDDAR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54339EDDAR, 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 TPS54339EDDAR part is unused and in its original packaging.
Return procedure for TPS54339EDDAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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