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Texas Instruments TPS54239DDA
- Part No.:
- TPS54239DDA
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS54239DDA.pdf
- Description:
- IC REG BUCK ADJ 2A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:334
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Product details
Overview
TPS54239DDA from Texas Instruments is a 2-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 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 core rails.
For engineers reviewing the TPS54239DDA datasheet, TPS54239DDA pinout, TPS54239DDA application, or TPS54239DDA equivalent, key selection considerations include its 600-kHz pseudo-fixed switching frequency, thermal shutdown at 165°C, cycle-by-cycle overcurrent protection, UVLO activation at ~3.75 V on VREG5, and compatibility with low-ESR ceramic output capacitors in compact SO PowerPAD™ (DDA) packages.
Technical Context
The TPS54239DDA implements D-CAP2™ mode control-a proprietary adaptive on-time PWM architecture that eliminates need for external loop compensation while maintaining stability with ultra-low-ESR ceramic capacitors. Its internal one-shot timer sets on-time based on VIN and VOUT, enabling pseudo-constant 600-kHz operation across input voltage range.
It integrates dual N-FETs with matched RDS(on) values (140 mΩ HS / 70 mΩ LS), a 5.5-V VREG5 LDO for biasing, and comprehensive protection including non-latching thermal shutdown (165°C), hiccup-mode overcurrent (2.5–4.6 A), and output overvoltage (125% of target) detection activated after 1.7× soft-start time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 23 V - supports wide industrial and consumer input buses including 12-V and 19-V systems without pre-regulation. |
| Output Current | 2 A continuous - sufficient for powering SoC cores, FPGAs, and DSPs in embedded video applications. |
| Switching Frequency | 600 kHz (pseudo-fixed) - enables compact magnetics and EMI filtering while balancing efficiency and size. |
| Feedback Reference | 765 mV ±16 mV - precise bandgap reference ensures tight output regulation across temperature and load. |
| High-Side RDS(on) | 140 mΩ - minimizes conduction loss at high duty cycles, improving efficiency in low-VOUT applications. |
| Low-Side RDS(on) | 70 mΩ - reduces synchronous rectification loss during light-load and discontinuous conduction modes. |
| Shutdown Current | <10 μA - enables ultra-low-power standby in battery-backed or always-on systems. |
| Soft-Start Control | Adjustable via external capacitor on SS pin - prevents inrush current and allows controlled ramp-up even with pre-biased outputs. |
Pinout & Package
The TPS54239DDA is housed in 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, moisture-sensitivity level 2 (260°C peak reflow), and rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VBST | 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. |
| 2: VIN | Main input power supply | Accepts 4.5–23 V; powers internal circuitry and high-side driver; requires local 10-μF ceramic decoupling. |
| 3: SW | Switch node | Connection point between high- and low-side FETs; critical for layout-must be short, low-inductance, and shielded from noise. |
| 4: GND | Power ground return | Single-point connection point for SW, VFB, and SS returns; must tie to exposed thermal pad and system PGND. |
| 5: VFB | Feedback input | Monitors output via resistor divider; 765-mV reference enables precise output setting; sensitive to noise-requires Kelvin routing. |
| 6: VREG5 | 5.5-V internal LDO output | Powers internal logic and VBST bootstrap; requires 0.47-μF ceramic capacitor to GND; disabled when EN = low. |
| 7: EN | Enable control input | Active-high logic input (1.6 V threshold); internal 200–800 kΩ pull-down enables default disable; supports sequencing. |
| 8: SS | Soft-start timing control | 6-μA current source charges external capacitor; determines startup ramp time and enables pre-biased start capability. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ adaptive on-time control | Eliminates external compensation network and enables stable operation with ceramic output capacitors as low as 22 μF. |
| Pre-biased soft start | Prevents reverse current flow into pre-charged outputs by gradually enabling low-side FET conduction during startup. |
| Cycle-by-cycle overcurrent protection | Detects valley current during low-side conduction; triggers hiccup mode after 7 consecutive overcurrent cycles. |
| Thermal shutdown with hysteresis | Shuts down at 165°C junction temperature and resumes only after cooling by ≥40°C-prevents thermal runaway. |
| VREG5 LDO with UVLO | Provides regulated 5.5-V bias rail; disables entire IC if VREG5 drops below 3.75 V, ensuring robust input undervoltage lockout. |
| Exposed thermal pad (PowerPAD™) | Enables direct PCB copper plane heat sinking; requires soldered connection to PGND for θJA ≤ 46.2°C/W performance. |
Applications
| Digital TV Power Supply | Blu-ray Disc Player Core Rail |
|---|---|
|
Use Scenario: Supplies 1.05 V @ 2 A to main SoC in flat-panel TV main board under dynamic video load conditions. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing tightly regulated core voltage with fast transient response to CPU/GPU burst loads. Use Value: D-CAP2™ control maintains <50 mV output deviation during 1-A load steps, eliminating need for large bulk capacitance. |
Use Scenario: Powers 1.2-V FPGA configuration logic and 3.3-V interface circuitry in high-definition optical disc players. IC Role / Device Role / Timing Role: Dual-output capable via resistor-divider tuning; delivers stable rail despite varying disc motor current draw. Use Value: Pre-biased soft start prevents voltage droop on shared 3.3-V bus when FPGA resets and reconfigures. |
| Networking Home Terminal | Digital Set Top Box (STB) |
|
Use Scenario: Generates 1.8-V and 2.5-V rails for Ethernet PHY, Wi-Fi module, and memory interfaces in residential gateway devices. IC Role / Device Role / Timing Role: Secondary buck regulator supporting multiple voltage domains with minimal BOM count and footprint. Use Value: 600-kHz switching enables use of 2.2-μH inductor and 22-μF ceramic caps-reducing solution size by >30% vs. lower-frequency alternatives. |
Use Scenario: Delivers 5-V and 1.05-V rails to MPEG decoder SoC and HDMI transmitter in cable/satellite STBs. IC Role / Device Role / Timing Role: Main DC/DC converter handling full system load; coordinated enable sequencing with upstream AC/DC controller. Use Value: Thermal shutdown and hiccup-mode OCP ensure safe operation during sustained overload (e.g., HDMI hot-plug transients). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54229DDA | Same DDA package and pinout; 1.7-A rating, 4.5–18-V input, 600-kHz fSW, but lacks VREG5 output and pre-biased soft start. | Not suitable where 5.5-V bias rail or pre-biased startup is required; limited to lower-current applications. | Select only if output current ≤1.7 A and VREG5 functionality is unused; verify feedback divider compatibility. |
| MP2307DN-LF-Z | Monolithic 2-A buck; 4.5–23-V input, 600-kHz fSW, but uses voltage-mode control requiring external compensation and larger output capacitance. | Higher output ripple and slower transient response; not optimized for ceramic-only designs. | Choose only if cost sensitivity outweighs performance needs; expect additional design effort for loop stability and EMI filtering. |
Compared with TPS54239DDA, TPS54229DDA offers reduced current capability and missing bias rail functionality, while MP2307DN-LF-Z requires external compensation and delivers inferior transient performance-making TPS54239DDA the optimal choice for compact, high-performance, ceramic-capacitor-based 2-A buck designs.
Availability
TPS54239DDA is available at Aetrix Electronics and suitable for digital TV power supplies, Blu-ray disc player core rails, and networking home terminals requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS54239DDA 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 and automotive-grade reliability.
The TPS54239DDA belongs to TI's SWIFT™ synchronous buck converter family, designed specifically for space-constrained, high-transient-response applications in consumer electronics and digital video equipment where low ESR ceramic capacitors and minimal external components are essential.
FAQ
What is the maximum input voltage rating for the TPS54239DDA?
The TPS54239DDA has an absolute maximum input voltage rating of 25 V on the VIN pin, but its recommended operating range is 4.5 V to 23 V. Exceeding 23 V may trigger overvoltage stress on internal circuitry, and operation above 25 V risks permanent damage. Always observe the 23-V upper limit in normal operation per TI's recommended conditions.
Does the TPS54239DDA support pre-biased output startup?
Yes, the TPS54239DDA supports pre-biased soft start. When the output voltage is already present at startup, the device gradually enables low-side FET conduction using cycle-by-cycle pulse-width incrementation-preventing reverse current flow and ensuring smooth ramp-up into regulation without disrupting adjacent rails.
What package type and thermal characteristics does the TPS54239DDA use?
The TPS54239DDA uses the 8-pin SO PowerPAD™ (DDA) package with an exposed thermal pad. Its thermal resistance is θJA = 46.2°C/W (junction-to-ambient) and θJCbot = 6.6°C/W (junction-to-board), requiring the thermal pad to be soldered directly to a PCB ground plane with thermal vias for optimal heat dissipation in 2-A operation.
Can the TPS54239DDA operate without external compensation components?
Yes, the TPS54239DDA operates without external compensation due to its D-CAP2™ adaptive on-time control architecture. This proprietary mode provides inherent stability with ceramic output capacitors (22–68 μF typical), eliminating the need for Type II or III compensation networks and reducing BOM count and layout complexity.
What is the function of the VREG5 pin on the TPS54239DDA?
The VREG5 pin on the TPS54239DDA provides a regulated 5.5-V output (typical 5.5 V, min 5.2 V, max 5.7 V) used to power internal logic and the high-side gate driver bootstrap circuit. It is active only when EN is high, requires a 0.47-μF ceramic capacitor to GND, and serves as the UVLO sense point for system-level undervoltage protection.
TPS54239DDA 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:
- 2A
- 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
TPS54239DDA FAQ
1.How can I place an order for TPS54239DDA through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54239DDA 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 TPS54239DDA reliable?
The price and inventory of TPS54239DDA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54239DDA is usually 5 days.
3.What payment methods are accepted for TPS54239DDA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54239DDA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54239DDA?
TPS54239DDA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54239DDA 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 TPS54239DDA?
For technical support, including TPS54239DDA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54239DDA requirements.
6.How does Aetrix verify that TPS54239DDA is sourced from the original manufacturer or authorized distributors?
All TPS54239DDA 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 TPS54239DDA meets industry standards.
7.What is the process for return or replacement of TPS54239DDA?
All TPS54239DDA units undergo pre-shipment inspection (PSI). If there is an issue with TPS54239DDA, 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 TPS54239DDA part is unused and in its original packaging.
Return procedure for TPS54239DDA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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