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Texas Instruments TPS54239EDDAR
- Part No.:
- TPS54239EDDAR
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS54239EDDAR.pdf
- Description:
- IC REG BUCK ADJ 2A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:4,727
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Product details
Overview
TPS54239EDDAR 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 employs D-CAP2™ adaptive on-time control for fast transient response and supports ceramic output capacitors in digital TV power supplies.
For engineers reviewing the TPS54239EDDAR datasheet, TPS54239EDDAR pinout, TPS54239EDDAR application, or TPS54239EDDAR equivalent, key selection considerations include Eco-mode™ light-load efficiency (<10 μA shutdown current), 600-kHz switching frequency, cycle-by-cycle overcurrent protection, pre-biased soft-start capability, and thermal pad–enabled thermal management in the SO PowerPAD™ DDA package.
Technical Context
The TPS54239EDDAR implements D-CAP2™ mode control combining adaptive on-time PWM with internal pseudo-fixed-frequency operation-on-time scales inversely with VIN and proportionally with VOUT to maintain ~600 kHz across input and load conditions. Its control loop requires no external compensation and remains stable with ultra-low-ESR ceramic output capacitors.
Eco-mode™ enables automatic transition from continuous conduction mode (CCM) to discontinuous conduction mode (DCM) at light loads, reducing switching losses while maintaining regulation. Protection features include valley-current–based cycle-by-cycle overcurrent limiting, non-latching thermal shutdown (165°C), output overvoltage (125% VOUT), and undervoltage lockout (UVLO) tied to VREG5 voltage.
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 rails. |
| Output Current | 2 A continuous - sufficient for powering SoCs, FPGAs, and memory subsystems in embedded video systems. |
| Switching Frequency | 600 kHz nominal - enables compact magnetics and predictable EMI profile without external clock synchronization. |
| FET RDS(on) | 140 mΩ (HS), 70 mΩ (LS) - minimizes conduction loss and improves full-load efficiency up to 95% at 1.8 V/2 A. |
| Feedback Reference | 0.765 V ±1.7 mV - high-accuracy bandgap reference enabling tight output regulation (±1%) across temperature. |
| Shutdown Current | <10 μA - ensures minimal system standby power draw in always-on applications like STB wake-on-LAN. |
| Soft-Start Control | Adjustable via external SS capacitor - prevents inrush current and enables pre-biased output startup without sinking current. |
Pinout & Package
The TPS54239EDDAR 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 supports –40°C to +85°C ambient operation and requires reflow per JEDEC Level-2-260°C-1-year MSL rating.
| 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; enables efficient high-side FET drive above VIN. |
| VIN (Pin 2) | Main power input | Supplies both power stage and internal circuitry; must be decoupled with ≥10 µF ceramic + 0.1 µF high-frequency bypass. |
| SW (Pin 3) | Switch node | Connects drain of HS-FET and source of LS-FET; critical high-di/dt node requiring minimized 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 with ≥4 thermal vias. |
| VFB (Pin 5) | Feedback input | Monitors output via resistor divider; 0.765 V reference sets VOUT = 0.765 × (1 + R1/R2); sensitive to noise-route away from SW. |
| VREG5 (Pin 6) | Internal 5.5 V LDO output | Powers internal logic and gate drivers; requires 0.47 µF ceramic capacitor to GND; inactive when EN = low. |
| EN (Pin 7) | Enable input | Active-high logic control (VENH = 1.6 V min); internal 200–800 kΩ pull-down allows direct connection to microcontroller GPIO. |
| SS (Pin 8) | Soft-start timing | 6 µA current source charges external capacitor; start-up time tSS = 1.1 × CSS × VREF/6 µA; supports pre-biased output ramp-up. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ adaptive on-time control | Eliminates need for external compensation network while supporting ceramic output capacitors down to 22 µF with stable phase margin. |
| Eco-mode™ light-load operation | Automatically enters DCM below ~300 mA load, reducing quiescent current to <25 µA and maintaining >85% efficiency at 10 mA output. |
| Pre-biased soft-start | Prevents reverse current flow during startup into powered outputs-critical for hot-swap and multi-rail sequencing in STB and Blu-ray players. |
| Cycle-by-cycle overcurrent protection | Detects valley current through LS-FET VDS; triggers hiccup mode after 7 consecutive cycles exceeding 2.5–4.6 A limit, protecting against short-circuit faults. |
| Integrated 5.5 V VREG5 LDO | Self-powered gate driver supply eliminates need for external bias rail; enables single-supply operation from 4.5 V input without auxiliary winding. |
Applications
| Digital TV Power Supply | High Definition Blu-ray Disc™ Player |
|---|---|
Use Scenario: Provides 1.2 V @ 2 A core voltage for MPEG decoder SoC and 3.3 V @ 1 A for HDMI interface IC in 4K-capable broadcast receivers. IC Role / Device Role / Timing Role: Primary buck regulator managing dynamic load transients during video frame decoding bursts and channel switching. Use Value: D-CAP2™ fast transient response limits output voltage deviation to <±30 mV under 1.5 A step load, eliminating need for oversized bulk capacitance. | Use Scenario: Generates 1.05 V @ 2 A for BD-ROM controller ASIC and 5 V @ 0.5 A for servo motor driver in region-free Blu-ray playback units. IC Role / Device Role / Timing Role: Main system PMIC buck stage delivering regulated power with pre-biased soft-start during disc insertion events. Use Value: Pre-biased startup prevents output collapse when 5 V rail is already active, ensuring glitch-free servo initialization and laser calibration. |
| Networking Home Terminal | Digital Set Top Box (STB) |
Use Scenario: Supplies 1.8 V @ 1.5 A to Wi-Fi/BT combo module and 3.3 V @ 1 A to Ethernet PHY in DOCSIS 3.1 cable modems with integrated voice gateway. IC Role / Device Role / Timing Role: Secondary buck converter fed from 12 V intermediate bus, optimized for low-noise RF section power integrity. Use Value: Low 140/70 mΩ RDS(on) reduces conduction loss by 35% vs. discrete solutions, improving thermal margin in sealed plastic enclosures. | Use Scenario: Delivers 1.5 V @ 2 A to ARM-based application processor and 1.05 V @ 1.2 A to DDR3 memory in IPTV-enabled STBs with DVR functionality. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator supporting deep-sleep modes with sub-10 μA shutdown current. Use Value: Eco-mode™ maintains >88% efficiency at 20 mA load, extending standby battery life in remote-controlled wake-on-IR implementations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2315DJ-LF-Z | 4.5–28 V input, 2 A, fixed 600 kHz, no Eco-mode™, lower accuracy VREF (0.8 V ±2%). | Lacks pre-biased soft-start and D-CAP2™ transient performance; suitable only for non-sequenced, non-prebiased loads. | Choose when cost sensitivity outweighs light-load efficiency and startup robustness requirements. |
| RT7272BGJ6F | 4.5–23 V input, 2 A, 600 kHz, valley-current OCP, but no integrated VREG5 LDO or thermal pad. | Requires external bias supply; higher θJA (65°C/W) limits power density in compact enclosures. | Select if board space permits discrete bias generation and thermal design accommodates higher junction rise. |
Compared with MP2315DJ-LF-Z and RT7272BGJ6F, the TPS54239EDDAR delivers superior light-load efficiency via Eco-mode™, eliminates external bias with its VREG5 LDO, and achieves lower thermal resistance through its exposed PowerPAD™, making it optimal for thermally constrained, multi-rail consumer electronics.
Availability
TPS54239EDDAR is available at Aetrix Electronics and suitable for digital TV power supplies, HD Blu-ray player designs, networking home terminals, and digital set-top boxes requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS54239EDDAR 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 50 years of innovation in high-reliability power conversion solutions.
The TPS54239E product line delivers cost-effective, low-component-count synchronous buck converters for consumer electronics requiring fast transient response, ceramic-capacitor compatibility, and seamless light-to-heavy load efficiency scaling.
FAQ
What is the maximum recommended input voltage for the TPS54239EDDAR?
The absolute maximum input voltage (VIN) for the TPS54239EDDAR is 25 V, but the recommended operating range is 4.5 V to 23 V. Exceeding 23 V risks violating the 25 V absolute max rating under transient conditions and may trigger UVLO or reduce reliability. Designers should ensure input filtering suppresses transients above 23 V, especially in automotive or industrial 24 V systems where load-dump spikes occur. The TPS54239EDDAR itself does not include integrated overvoltage clamping.
Does the TPS54239EDDAR support pre-biased output startup?
Yes, the TPS54239EDDAR supports pre-biased soft-start. When the output voltage is already present at startup, the device detects VFB > internal soft-start voltage and gradually enables synchronous rectification using narrow, incrementally widening low-side gate pulses. This prevents reverse current flow from the output into the converter, avoiding voltage droop or system reset. This behavior is confirmed in the functional description and startup waveform figures of the SLVSBT1 datasheet for TPS54239EDDAR.
What is the purpose of the VREG5 pin on the TPS54239EDDAR?
The VREG5 pin on the TPS54239EDDAR is an internally generated 5.5 V regulated output used to power the gate drivers and internal logic circuits. It eliminates the need for an external bias supply and enables single-rail operation from as low as 4.5 V input. A 0.47 µF ceramic capacitor must be placed between VREG5 and GND. VREG5 is disabled when EN is low, and its UVLO threshold (3.45–4.05 V) provides system-level undervoltage protection for the entire TPS54239EDDAR.
How does Eco-mode™ improve efficiency at light loads in the TPS54239EDDAR?
Eco-mode™ in the TPS54239EDDAR 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 is turned off once inductor current reaches zero, eliminating reverse recovery losses and reducing switching activity. This lowers quiescent current to <25 µA and maintains >85% efficiency at 10 mA output-critical for standby operation in digital TV and STB applications where the TPS54239EDDAR operates continuously.
What thermal management requirements apply to the TPS54239EDDAR's exposed PowerPAD™?
For reliable operation, the TPS54239EDDAR's exposed thermal pad must be soldered directly to a solid copper PGND plane on the PCB, with at least four 0.3-mm diameter thermal vias connecting it to inner or bottom-layer ground planes. TI specifies θJA = 46.2°C/W for this configuration. Failure to properly connect the pad increases junction temperature by >30°C at 2 A load, risking thermal shutdown or accelerated aging. Layout guidelines in SLVSBT1 emphasize single-point analog-to-power ground tie and avoidance of switching current paths under the device.
TPS54239EDDAR 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:
- 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
TPS54239EDDAR FAQ
1.How can I place an order for TPS54239EDDAR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54239EDDAR 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 TPS54239EDDAR reliable?
The price and inventory of TPS54239EDDAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54239EDDAR is usually 5 days.
3.What payment methods are accepted for TPS54239EDDAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54239EDDAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54239EDDAR?
TPS54239EDDAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54239EDDAR 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 TPS54239EDDAR?
For technical support, including TPS54239EDDAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54239EDDAR requirements.
6.How does Aetrix verify that TPS54239EDDAR is sourced from the original manufacturer or authorized distributors?
All TPS54239EDDAR 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 TPS54239EDDAR meets industry standards.
7.What is the process for return or replacement of TPS54239EDDAR?
All TPS54239EDDAR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54239EDDAR, 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 TPS54239EDDAR part is unused and in its original packaging.
Return procedure for TPS54239EDDAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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