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Texas Instruments TPS56339DDCT
- Part No.:
- TPS56339DDCT
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
TPS56339DDCT.pdf
- Description:
- IC REG BUCK ADJ 3A SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,887
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Product details
Overview
TPS56339DDCT from Texas Instruments is a 4.5-V to 24-V input, 3-A synchronous buck DC/DC converter in SOT-23-6 package, featuring integrated 70-mΩ high-side and 35-mΩ low-side MOSFETs, fixed 500-kHz switching frequency, and internal 5-ms soft-start. It delivers regulated 0.8-V to 16-V output for point-of-load power in space-constrained industrial and consumer systems.
For engineers reviewing the TPS56339DDCT datasheet, TPS56339DDCT pinout, TPS56339DDCT application, or TPS56339DDCT equivalent, key selection considerations include its Advanced Emulated Current Mode (AECM) control for fast transient response, cycle-by-cycle current limiting on both FETs, 98-μA quiescent current, 3-μA shutdown current, and support for up to 97% duty cycle in dropout conditions.
Technical Context
The TPS56339DDCT employs Advanced Emulated Current Mode (AECM) control with a fixed 500-kHz oscillator, enabling predictable EMI filtering and fast load-step response without external compensation. Its internal adaptive loop adjustment maintains stability across 0.8-V to 16-V output range.
It integrates dual N-channel MOSFETs (70-mΩ HS / 35-mΩ LS), supports monotonic startup into pre-biased loads, and implements hiccup-mode undervoltage protection triggered at 62.5% of nominal VOUT with 120-μs deglitch and 38-ms restart delay. Thermal shutdown activates at 160°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 24 V - supports common 12-V and 19-V distributed bus rails without external regulators. |
| Output Current | 3 A continuous - sufficient for powering FPGA I/O banks, DSP cores, or multi-sensor modules. |
| Switching Frequency | Fixed 500 kHz (±8%) - enables compact magnetics and deterministic EMI filter design. |
| Quiescent Current | 98 μA typical - minimizes standby power loss in always-on subsystems like security camera wake logic. |
| Shutdown Current | 3 μA typical - ensures ultra-low system-level leakage during deep sleep modes. |
| Internal Soft-Start | 5 ms - limits inrush current into bulk capacitance, preventing input rail sag during power-up. |
| Duty Cycle Max | 97% - sustains regulation down to VIN ≈ VOUT + 0.5 V under light load, extending usable input range. |
Pinout & Package
SOT-23-6 (DDC) package, 1.60 mm × 2.90 mm body size, thermally enhanced with exposed pad (not electrically connected per datasheet).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power and signal ground reference | Source terminal of low-side MOSFET and controller ground; FB must connect here at single point to avoid noise coupling. |
| SW (Pin 2) | Switch node | Connection between high-side and low-side MOSFETs; requires tight layout to minimize ringing and EMI. |
| VIN (Pin 3) | Main input supply | Drain of high-side MOSFET; must be decoupled with ≥10-μF ceramic capacitor close to pin. |
| EN (Pin 5) | Enable control input | Logic-compatible enable with 1.18-V rise threshold; floats high by internal 1.2-μA pull-up for self-start. |
| FB (Pin 4) | Feedback input | Connects to resistor divider from VOUT; senses 0.802-V internal reference to regulate output voltage. |
| BOOT (Pin 6) | Bootstrap supply | Requires 0.1-μF ceramic capacitor to SW; supplies gate drive for high-side MOSFET; monitored for UVLO at 2.2 V. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | 70-mΩ HS + 35-mΩ LS MOSFETs - eliminates external FETs and drivers, reducing BOM count and layout area. |
| AECM Control Architecture | Fixed-frequency emulation with adaptive loop - achieves fast transient response without external compensation components. |
| Dual Current Limit Protection | 4.7-A HS peak limit + 3.6-A LS sourcing limit - prevents runaway current during overload while maintaining hiccup recovery. |
| Pre-Biased Soft Start | Monotonic ramp into pre-charged output - avoids reverse current flow that could damage downstream circuitry. |
| Thermal & UV Protection | 160°C thermal shutdown with 20°C hysteresis + non-latched VIN UVLO (4.2-V rising) - ensures robust operation under fault conditions. |
Applications
| Industrial Video Surveillance | Consumer LCD Monitors |
|---|---|
Use Scenario: Powering image sensor, ISP, and video encoder in IP cameras operating from 12-V PoE or 19-V AC adapter. IC Role / Device Role / Timing Role: Primary 3.3-V or 5-V point-of-load regulator delivering stable 3-A peak current during motion-triggered encoding bursts. Use Value: AECM control maintains <±2% output deviation during 2-A load steps, ensuring clean clock domains for pixel data capture. | Use Scenario: Generating 5-V and 12-V rails for LCD panel timing controller, backlight driver, and USB-HID interface in desktop monitors. IC Role / Device Role / Timing Role: Secondary buck regulator supplying 5-V logic rail with tight ripple (<20 mVpp) for TCON microcontroller. Use Value: 98-μA quiescent current enables <10-mW standby power, meeting Energy Star v8.0 requirements for display sleep mode. |
| Smart Speaker Audio DSP | Appliance Control Board |
Use Scenario: Providing 1.2-V core supply to audio DSP and 3.3-V I/O supply to Wi-Fi/BT SoC in voice-controlled speakers. IC Role / Device Role / Timing Role: Dual-rail power solution using single TPS56339DDCT per rail with feedback divider tuning. Use Value: Internal 5-ms soft-start prevents brownout resets during cold boot when multiple rails sequence simultaneously. | Use Scenario: Regulating 3.3-V MCU supply and 5-V sensor interface rail in washing machine main control board exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Main system regulator supporting –40°C to +125°C junction operation with integrated thermal shutdown. Use Value: 160°C thermal shutdown with 20°C hysteresis prevents latch-up during motor surge events while allowing safe auto-recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS563201DDCR | Same SOT-23-6 package, 4.5–17-V input, 2-A output, 580-kHz fSW, 100-mΩ/60-mΩ RDS(on) | Lower current rating and narrower input range; less suitable for 19-V bus or 3-A loads. | Select when cost sensitivity outweighs 3-A headroom and 24-V tolerance requirements. |
| MP2332GDD-Z | 3-A, 4.5–28-V input, SOT-23-6, 500-kHz, but uses constant-on-time control and lacks pre-biased soft start. | No monotonic startup into pre-biased outputs; higher EMI variability due to variable frequency under light load. | Choose only if fixed-frequency AECM control and hiccup-mode UVP are not required. |
Compared with TPS56339DDCT, TPS563201DDCR offers lower cost but sacrifices 33% output current and 7-V input headroom, while MP2332GDD-Z matches current and voltage specs but replaces deterministic AECM control with COT architecture-impacting EMI predictability and startup behavior in pre-biased systems.
Availability
TPS56339DDCT is available at Aetrix Electronics and suitable for industrial video surveillance, consumer LCD monitors, and smart speaker audio DSP applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS56339DDCT 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management ICs with broad industrial and automotive qualification.
The TPS563xx family targets high-density, low-component-count DC/DC conversion for space-constrained applications such as portable instrumentation, IoT edge nodes, and consumer electronics where thermal performance and fast transient response are critical.
FAQ
What is the maximum duty cycle supported by the TPS56339DDCT?
The TPS56339DDCT supports up to 97% duty cycle, enabled by its 5-μs maximum on-time and frequency foldback scheme. This allows regulation at very low input-to-output differentials-for example, sustaining 5-V output with VIN as low as ~5.3 V under light load-making it suitable for wide-input industrial power buses.
Does the TPS56339DDCT require external compensation components?
No, the TPS56339DDCT features internal loop compensation optimized for 0.8-V to 16-V output range. Its Advanced Emulated Current Mode (AECM) control with adaptive loop adjustment eliminates the need for external compensation networks, reducing design complexity and PCB area while maintaining stability across all supported VOUT configurations.
Can the TPS56339DDCT safely start into a pre-biased output voltage?
Yes, the TPS56339DDCT implements monotonic pre-biased soft start. During startup, both high-side and low-side MOSFETs remain off until the internal soft-start voltage exceeds the FB pin voltage, preventing reverse current flow and ensuring controlled ramp-up even when the output capacitor is already charged-critical for hot-swap and redundant power systems.
What protection features does the TPS56339DDCT include?
The TPS56339DDCT includes cycle-by-cycle high-side and low-side current limiting, non-latched input undervoltage lockout (UVLO), output undervoltage protection (UVP) with hiccup mode, and thermal shutdown at 160°C with 20°C hysteresis. These features collectively prevent damage during overloads, input sags, short circuits, and overheating without requiring external supervision circuitry.
What is the recommended bootstrap capacitor value for the TPS56339DDCT?
The TPS56339DDCT requires a 0.1-μF X7R ceramic capacitor between BOOT and SW pins. This value ensures sufficient charge storage to maintain high-side gate drive above the 2.2-V BOOT-SW UVLO threshold across full load and temperature ranges, especially during high-duty-cycle operation near dropout conditions.
TPS56339DDCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- 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):
- 24V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 16V
- Current - Output:
- 3A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
TPS56339DDCT FAQ
1.How can I place an order for TPS56339DDCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS56339DDCT 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 TPS56339DDCT reliable?
The price and inventory of TPS56339DDCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS56339DDCT is usually 5 days.
3.What payment methods are accepted for TPS56339DDCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS56339DDCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS56339DDCT?
TPS56339DDCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS56339DDCT 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 TPS56339DDCT?
For technical support, including TPS56339DDCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS56339DDCT requirements.
6.How does Aetrix verify that TPS56339DDCT is sourced from the original manufacturer or authorized distributors?
All TPS56339DDCT 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 TPS56339DDCT meets industry standards.
7.What is the process for return or replacement of TPS56339DDCT?
All TPS56339DDCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS56339DDCT, 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 TPS56339DDCT part is unused and in its original packaging.
Return procedure for TPS56339DDCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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