My Inquiry
My Account
Texas Instruments TPS54339DDAR
- Part No.:
- TPS54339DDAR
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS54339DDAR.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:5,210
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS54339DDAR 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, 4.5 V to 23 V input range, 0.76 V to 7 V adjustable output, and 600 kHz switching frequency. It delivers stable power in digital TV, Blu-ray player, and STB power rails.
For engineers reviewing the TPS54339DDAR datasheet, TPS54339DDAR pinout, TPS54339DDAR application, or TPS54339DDAR equivalent, key selection criteria include its ceramic-capacitor-compatible D-CAP2™ transient response, pre-biased soft-start capability, cycle-by-cycle overcurrent protection, and thermal shutdown at 165°C - all critical for compact, high-reliability consumer power designs.
Technical Context
The TPS54339DDAR implements D-CAP2™ adaptive on-time control, combining constant on-time operation with internal ripple-simulation circuitry to eliminate external compensation and ensure stability with ultra-low-ESR ceramic output capacitors. Its one-shot timer sets on-time inversely proportional to VIN and proportional to VOUT, enabling pseudo-fixed 600 kHz operation across input voltage variations.
It integrates dual MOSFETs, a 5.5 V VREG5 LDO for gate drive bias, EN-active-high logic, SS-controlled soft-start with 6 µA charge current, and comprehensive protection including valley-current OCP, hiccup-mode UVP (65% threshold), non-latching OVP (125%), UVLO (3.75 V typical), and thermal shutdown (165°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 23 V - supports wide-input industrial and consumer bus rails without external regulators. |
| Output Current | 3 A continuous - sufficient for SoC core or memory rail in digital entertainment systems. |
| Switching Frequency | 600 kHz - enables compact magnetics and predictable EMI filtering while balancing efficiency and size. |
| 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. |
| VFB Reference | 0.765 V ±15 mV - enables precise output regulation with standard 1% feedback resistors. |
| Soft-Start Control | Adjustable via external capacitor (6 µA charge current) - prevents inrush and enables controlled ramp-up even with pre-biased outputs. |
| Shutdown Current | <10 µA - ensures ultra-low system standby power in always-on consumer devices. |
| Operating Temperature | –40°C to +85°C - qualified for commercial and extended-temperature consumer electronics environments. |
Pinout & Package
The TPS54339DDAR 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/Sn), and MSL Level-2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBST | Bootstrap supply | Provides gate drive voltage for high-side FET; requires 0.1 µF ceramic capacitor to SW node. |
| VIN | Main input supply | Accepts 4.5–23 V; powers internal circuitry and low-side FET driver; bypass with ≥10 µF ceramic. |
| SW | Switch node | Connects between internal HS and LS FETs; high di/dt node requiring minimal trace area and Kelvin routing. |
| GND | Power ground | Return path for switching current; must be connected to exposed thermal pad and separated from analog ground. |
| VFB | Feedback input | Senses output voltage via resistor divider; reference is 0.765 V; sensitive to noise - route away from SW. |
| VREG5 | Bias LDO output | 5.5 V regulated supply for gate drivers; requires 0.47 µF ceramic capacitor to GND; disabled when EN = low. |
| EN | Enable input | Active-high logic control (1.6 V threshold); internal 200–800 kΩ pull-down; supports sequencing and standby modes. |
| SS | Soft-start control | External capacitor sets ramp time; 6 µA internal current source enables pre-biased start-up without sinking output. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ adaptive on-time control | Enables zero-external-compensation design and fast transient response (<10 µs) with ceramic output capacitors. |
| Integrated dual MOSFETs | Reduces BOM count and layout complexity; 140 mΩ/70 mΩ RDS(on) optimizes efficiency at medium duty cycles. |
| Pre-biased soft-start | Prevents reverse current flow during startup when output is already biased - essential for hot-swap and multi-rail systems. |
| Cycle-by-cycle overcurrent protection | Monitors low-side FET voltage during conduction; triggers hiccup mode after 7 consecutive overcurrent events. |
| Thermal shutdown with hysteresis | Shuts down at 165°C junction temperature and restarts only after cooling by ≥40°C - prevents thermal runaway. |
| VREG5 LDO | Self-contained 5.5 V bias rail eliminates need for external bootstrap supply; supports robust gate drive under wide VIN conditions. |
Applications
| Digital Television Power Supply | High-Definition Blu-ray Disc™ Player |
|---|---|
Use Scenario: Powers main SoC core voltage (1.05 V/3 A) and DDR memory interface in flat-panel TV mainboards. IC Role / Device Role / Timing Role: Primary buck regulator delivering tightly regulated, low-noise DC power with fast load-step response to dynamic video processing loads. Use Value: D-CAP2™ control maintains <50 mV output deviation during 2 A load transients, eliminating need for large bulk capacitance. | Use Scenario: Supplies 1.2 V/2 A to BD-ROM controller ASIC and 3.3 V/1.5 A to servo motor driver in Blu-ray disc players. IC Role / Device Role / Timing Role: Dual-rail power manager supporting independent soft-start sequencing and hiccup-mode fault containment per rail. Use Value: Pre-biased soft-start prevents output collapse when 3.3 V rail powers up before 1.2 V rail, ensuring deterministic boot sequence. |
| Networking Home Terminal | Digital Set Top Box (STB) |
Use Scenario: Generates 1.8 V/2.5 A for broadband gateway SoC and 5 V/1 A auxiliary rail in cable/fiber home routers. IC Role / Device Role / Timing Role: High-efficiency primary converter operating from 12 V wall adapter input; optimized for light-load efficiency via low 10 µA shutdown current. Use Value: Achieves >85% efficiency at 100 mA load due to low quiescent current and optimized FET sizing - extends standby battery life. | Use Scenario: Delivers 1.05 V/3 A to STB application processor and 1.8 V/1.2 A to HDMI PHY in satellite/cable set-top boxes. IC Role / Device Role / Timing Role: Compact, thermally robust power stage using exposed PowerPAD™ for conduction cooling in sealed enclosures. Use Value: θJA = 46.2°C/W and thermal pad soldering enable full 3 A output without heatsink in 85°C ambient environments. |
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, 4.5–20 V input, 3 A, but fixed 1.2 V output (non-adjustable); no SS pin. | Limited to fixed-output applications; lacks soft-start and VFB adjustability - unsuitable for multi-voltage designs. | Select only if 1.2 V output suffices and board space constraints prohibit external feedback resistors. |
| MP2339DJ-LF-P | Monolithic 3 A buck, 4.5–26 V input, 0.8–15 V output, but uses current-mode control and requires external compensation. | Higher external component count; slower transient response than D-CAP2™; no pre-biased soft-start. | Choose when design requires wider output voltage range beyond 7 V or compatibility with existing current-mode layout practices. |
Compared with TPS54339DDAR, TPS54337DDAR trades flexibility for simplicity in fixed-voltage use cases, while MP2339DJ-LF-P offers broader output range at the cost of added compensation components and reduced transient performance - making TPS54339DDAR optimal for ceramic-capacitor-based, multi-rail consumer power systems.
Availability
TPS54339DDAR is available at Aetrix Electronics and suitable for digital television power supplies, Blu-ray player SoC rails, and STB application processor power delivery requiring stable component supply, long-term lifecycle support, and consistent parametric performance.
Supply support for TPS54339DDAR 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 TPS54339DDAR belongs to TI's SWIFT™ synchronous buck converter family, designed specifically for cost-sensitive, space-constrained consumer electronics requiring fast transient response, low ESR capacitor compatibility, and seamless integration into multi-rail power architectures.
FAQ
What is the maximum recommended output current for the TPS54339DDAR?
The TPS54339DDAR is rated for continuous 3 A output current under recommended operating conditions (–40°C to 85°C, proper thermal layout). Its cycle-by-cycle overcurrent limit is specified at 3.5–5.7 A, but sustained operation above 3 A requires careful thermal design - including full soldering of the exposed PowerPAD™ to a ≥4 cm² copper plane with ≥6 thermal vias - to maintain junction temperature below 150°C. Derating is advised above 70°C ambient.
Does the TPS54339DDAR support pre-biased output startup?
Yes, the TPS54339DDAR supports pre-biased soft-start. When the output voltage is already present at startup, the device avoids sinking current by gradually enabling synchronous rectification - starting with narrow low-side gate pulses and incrementing on-time cycle-by-cycle until reaching normal duty-cycle operation. This behavior is intrinsic to the control architecture and requires no external components or configuration; it is confirmed in the functional description and startup waveform figures of the SLVSBT2 datasheet.
What is the purpose of the VREG5 pin on the TPS54339DDAR?
The VREG5 pin on the TPS54339DDAR provides a regulated 5.5 V output (typical) used internally to bias the high-side and low-side gate drivers. It is powered from VIN and remains active only when EN is high. A 0.47 µF ceramic capacitor must be placed between VREG5 and GND for stability. VREG5 is not intended as a general-purpose LDO - its output current capability is limited to 10 mA, and it shuts down completely during device disable or UVLO conditions.
Can the TPS54339DDAR operate with ceramic output capacitors only?
Yes, the TPS54339DDAR is explicitly designed for ceramic output capacitors. Its D-CAP2™ control architecture includes internal ripple-simulation circuitry that eliminates dependency on capacitor ESR for loop stability - unlike traditional voltage-mode or current-mode controllers. The datasheet confirms stable operation with "ultra-low ESR ceramic capacitors" and recommends 22 µF to 68 µF total output capacitance, typically implemented with two or more parallel 22 µF X5R/X7R MLCCs.
What is the switching frequency tolerance of the TPS54339DDAR?
TPS54339DDAR operates at a nominal 600 kHz switching frequency, but this is a pseudo-constant value determined adaptively by VIN and VOUT via its on-time timer. Typical frequency variation is ±10% across input voltage (4.5–23 V) and load (0–3 A), as shown in Figures 9 and 10 of the SLVSBT2 datasheet. At VIN = 12 V and VOUT = 1.05 V, measured fSW ranges from 550 kHz to 650 kHz - a natural consequence of adaptive on-time control, not a specification error or defect.
TPS54339DDAR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™, D-CAP2™
- 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
TPS54339DDAR FAQ
1.How can I place an order for TPS54339DDAR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54339DDAR 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 TPS54339DDAR reliable?
The price and inventory of TPS54339DDAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54339DDAR is usually 5 days.
3.What payment methods are accepted for TPS54339DDAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54339DDAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54339DDAR?
TPS54339DDAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54339DDAR 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 TPS54339DDAR?
For technical support, including TPS54339DDAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54339DDAR requirements.
6.How does Aetrix verify that TPS54339DDAR is sourced from the original manufacturer or authorized distributors?
All TPS54339DDAR 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 TPS54339DDAR meets industry standards.
7.What is the process for return or replacement of TPS54339DDAR?
All TPS54339DDAR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54339DDAR, 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 TPS54339DDAR part is unused and in its original packaging.
Return procedure for TPS54339DDAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS54339DDAR Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
