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Texas Instruments TPS56339DDCR
- Part No.:
- TPS56339DDCR
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
TPS56339DDCR.pdf
- Description:
- IC REG BUCK ADJ 3A SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,678
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Product details
Overview
TPS56339DDCR 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, internal 5-ms soft-start, and Advanced Emulated Current Mode (AECM) control for fast transient response-used in 12-V/19-V distributed power-bus supplies for video surveillance systems.
For engineers reviewing the TPS56339DDCR datasheet, TPS56339DDCR pinout, TPS56339DDCR application, or TPS56339DDCR equivalent, key selection considerations include input voltage range (4.5–24 V), output current capability (3 A continuous), quiescent current (98 µA), shutdown current (3 µA), and thermal shutdown threshold (160 °C).
Technical Context
The TPS56339DDCR implements Advanced Emulated Current Mode (AECM) control with fixed-frequency operation (420–600 kHz), enabling predictable EMI behavior and fast load-transient response without external compensation. Its internal adaptive loop adjustment supports stable regulation across 0.8–16 V output range.
It integrates cycle-by-cycle current limiting on both high-side (3.9–5.4 A typical limit) and low-side (2.7–4.7 A) MOSFETs, non-latched undervoltage protection (62.5% UVP threshold), hiccup-mode recovery, and thermal shutdown (160 °C trip, 140 °C hysteresis), ensuring robust operation under overload and fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 24 V - supports wide industrial and consumer supply rails including 12-V and 19-V bus systems. |
| Output Current | 3 A continuous - delivers full rated load without external current-sense components or heatsinking in compact layout. |
| Switching Frequency | 500 kHz (typical), 420–600 kHz range - enables small external inductors (e.g., 5.6 µH for 5 V out) and predictable EMI filtering. |
| Quiescent Current | 98 µA (typical) - minimizes standby power loss in always-on applications like security cameras. |
| Shutdown Current | 3 µA (typical) - ensures ultra-low system-level leakage when disabled via EN pin. |
| Internal Soft-Start | 5 ms - prevents inrush current into bulk capacitance and enables monotonic startup into pre-biased outputs. |
| Thermal Shutdown | 160 °C (trip), 20 °C hysteresis - protects silicon integrity during sustained overload or poor PCB thermal design. |
Pinout & Package
SOT-23-6 (DDC) package, 1.60 mm × 2.90 mm body size, thermally enhanced with exposed pad not present - optimized for space-constrained industrial and consumer PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power and signal ground reference | Common return for low-side MOSFET source and controller circuitry; FB must connect to this pin at single-point for noise immunity. |
| SW (Pin 2) | Switch node | Connection between high- and low-side MOSFETs; drives external inductor and boot capacitor; high dv/dt node requiring tight layout. |
| VIN (Pin 3) | Main input supply | Drain of high-side MOSFET and primary input rail connection; requires local 10-µF ceramic input capacitor. |
| EN (Pin 5) | Enable control input | Logic-level enable with 1.18 V rise threshold; internal 1.2-µA pull-up allows floating for self-start; supports adjustable UVLO with resistor divider. |
| FB (Pin 4) | Feedback input | Connects to resistor divider from VOUT; references internal 0.802 V ±2.5% bandgap; determines regulated output voltage (0.8–16 V). |
| BOOT (Pin 6) | Bootstrap supply | Supplies gate drive for high-side MOSFET via 0.1-µF ceramic capacitor to SW; monitored for UVLO (2.2 V threshold) to ensure reliable high-side turn-on. |
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 complexity. |
| Internal Loop Compensation | Adaptive compensation network - removes need for external Type-II/III compensation, simplifying design across 0.8–16 V output range. |
| Advanced Emulated Current Mode | Fixed-frequency control with fast transient response - achieves <100 mV output deviation under 1-A step load without output capacitor tuning. |
| Dual MOSFET Current Limit | High-side peak (4.7 A typ) + low-side valley (3.6 A typ) limiting - prevents runaway current during short-circuit while maintaining hiccup-mode recovery. |
| Pre-Biased Soft Start | Monotonic startup into pre-charged outputs - avoids reverse current flow through low-side MOSFET, protecting downstream loads. |
Applications
| Video Surveillance Systems | Smart Home Appliances |
|---|---|
Use Scenario: Powering image sensor, ISP, and video encoder in IP security cameras with 12-V input bus. IC Role / Device Role / Timing Role: Primary 5-V or 3.3-V point-of-load regulator delivering 3-A peak current during motion-triggered recording. Use Value: High efficiency (>90% at 1-A load, 12-VIN/5-VOUT) extends thermal margin; 5-ms soft-start prevents camera reset during brownout recovery. | Use Scenario: Regulating 3.3-V logic supply for MCU and touch interface in smart refrigerators or washing machines. IC Role / Device Role / Timing Role: Always-on auxiliary rail supporting real-time clock, Wi-Fi module, and sensor hub with ultra-low quiescent current. Use Value: 98-µA IQ enables >1-year battery backup for RTC; SOT-23-6 footprint saves space on crowded mainboard. |
| Digital TV Power Management | Wireless Speaker Audio Subsystem |
Use Scenario: Generating 5-V and 12-V rails for display driver ICs and HDMI interface in LCD TVs. IC Role / Device Role / Timing Role: Secondary buck converter following front-end PFC stage; handles dynamic backlight dimming transients. Use Value: AECM control delivers <50-µs response to 2-A load steps, minimizing visible flicker; 97% max duty cycle supports low-dropout operation near 5-V input. | Use Scenario: Supplying 3.3-V digital core and 5-V Class-D amplifier bias in Bluetooth-enabled smart speakers. IC Role / Device Role / Timing Role: Compact, high-density POL converter placed adjacent to audio SoC and amplifier IC. Use Value: Integrated MOSFETs eliminate discrete FET layout concerns; thermal shutdown (160 °C) prevents damage during extended high-volume playback. |
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, 3-A rating, but 650-kHz fSW and higher RDS(on) (90 mΩ HS / 50 mΩ LS). | Lower max input voltage limits use in 19-V bus systems; reduced efficiency at high VIN due to higher conduction loss. | Select when higher switching frequency enables smaller magnetics and input capacitors are constrained. |
| MP2339DJ-LF-Z | Monolithic 3-A buck in SOT-23-6, 4.5–28-V input, but uses voltage-mode control, no internal soft-start, and 1.2-V feedback reference. | Lacks AECM transient performance and monotonic pre-biased startup; requires external soft-start circuit for critical loads. | Choose where cost sensitivity outweighs need for fast transient response and simplified design-in. |
Compared with TPS56339DDCR, TPS563201DDCR trades input voltage headroom for higher frequency and MP2339DJ-LF-Z sacrifices control-loop sophistication for broader input range and lower unit cost-making TPS56339DDCR optimal for 12/19-V industrial systems demanding reliability, ease of design, and consistent transient behavior.
Availability
TPS56339DDCR is available at Aetrix Electronics and suitable for video surveillance systems, smart home appliances, and digital TV power management requiring stable component supply, long-term production continuity, and TI-qualified automotive-grade traceability.
Supply support for TPS56339DDCR 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-reliability power conversion solutions.
The TPS56339 belongs to TI's D-CAP™-compatible synchronous buck converter family, designed specifically for space-constrained, high-efficiency point-of-load applications in industrial, consumer, and security electronics where minimal external components and robust fault protection are essential.
FAQ
What is the maximum duty cycle supported by the TPS56339DDCR?
The TPS56339DDCR supports up to 97% maximum duty cycle, enabled by its 5-µs maximum on-time and 115-ns minimum off-time. This allows operation with very low input-to-output voltage differentials-critical for 5-V output from 6.5-V input or 12-V output from 13-V input-without dropping out of regulation.
Does the TPS56339DDCR require external compensation components?
No, the TPS56339DDCR features internal loop compensation optimized for its Advanced Emulated Current Mode architecture. It operates stably across the full 0.8–16-V output range without external compensation networks, significantly reducing design time and component count compared to traditional current-mode controllers.
Can the TPS56339DDCR safely start into a pre-biased output voltage?
Yes, the TPS56339DDCR implements monotonic pre-biased soft start: both high-side and low-side MOSFETs remain off until the internal soft-start voltage exceeds the FB pin voltage. This prevents reverse current flow through the low-side FET and ensures controlled ramp-up even when the output is already charged to a non-zero voltage.
What protection features are integrated into the TPS56339DDCR?
The TPS56339DDCR integrates cycle-by-cycle high-side and low-side current limiting, non-latched undervoltage protection (UVP) with 62.5% threshold and 120-µs deglitch, thermal shutdown (160 °C trip, 140 °C hysteresis), BOOT-SW UVLO (2.2 V), and input UVLO (4.2 V rising). All protections enter hiccup mode to limit power dissipation during sustained faults.
How does the EN pin function on the TPS56339DDCR?
The EN pin on the TPS56339DDCR has an internal 1.2-µA pull-up current, allowing it to be left floating for automatic enable when VIN is within operating range. It triggers at 1.18 V (rising) and releases at 1.12 V (falling), and can be configured with external resistors to adjust input UVLO thresholds-enabling precise power sequencing in multi-rail systems.
TPS56339DDCR 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
TPS56339DDCR FAQ
1.How can I place an order for TPS56339DDCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS56339DDCR 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 TPS56339DDCR reliable?
The price and inventory of TPS56339DDCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS56339DDCR is usually 5 days.
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TPS56339DDCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS56339DDCR 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 TPS56339DDCR?
For technical support, including TPS56339DDCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS56339DDCR requirements.
6.How does Aetrix verify that TPS56339DDCR is sourced from the original manufacturer or authorized distributors?
All TPS56339DDCR 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 TPS56339DDCR meets industry standards.
7.What is the process for return or replacement of TPS56339DDCR?
All TPS56339DDCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS56339DDCR, 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 TPS56339DDCR part is unused and in its original packaging.
Return procedure for TPS56339DDCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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