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Texas Instruments TPS54302DDCT
- Part No.:
- TPS54302DDCT
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
TPS54302DDCT.pdf
- Description:
- IC REG BUCK ADJ 3A SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,343
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Product details
Overview
TPS54302DDCT from Texas Instruments is a 4.5V to 28V input, 3A synchronous step-down DC/DC converter in SOT-23-THIN (6-pin) package, integrating 85mΩ high-side and 40mΩ low-side MOSFETs, operating at fixed 400kHz with spread-spectrum EMI reduction - used for 12V/24V distributed power-bus regulation in white goods and audio systems.
For engineers reviewing the TPS54302DDCT datasheet, TPS54302DDCT pinout, TPS54302DDCT application, or TPS54302DDCT equivalent, key selection considerations include its 2μA shutdown current, internal 5ms soft-start, Eco-mode pulse skip for light-load efficiency, overcurrent hiccup protection, and thermal shutdown at 160°C - all critical for industrial and consumer power supply design.
Technical Context
The TPS54302DDCT employs peak current-mode control with internal slope compensation to prevent subharmonic oscillation across duty cycles, and integrates boot recharge diode and internal loop compensation to eliminate external compensation components. Its fixed 400kHz switching frequency is dithered ±6% via spread-spectrum modulation to reduce conducted and radiated EMI peaks.
It features dual overcurrent protection: cycle-by-cycle high-side current limiting (4–6A typical) and low-side valley-current limiting (3.1–5.5A), both triggering hiccup mode after 512 cycles of sustained overload. Output voltage is set via FB pin with 0.596V (±2.5%) internal reference, enabling precise 3.3V/5V/12V regulation using standard resistor dividers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 28V - supports direct connection to 12V/24V industrial and automotive bus rails without pre-regulation. |
| Output Current | 3A continuous - delivers full rated load in compact SOT-23-THIN footprint with no external heat sink required under typical conditions. |
| Switching Frequency | Fixed 400kHz (±110kHz) - enables small external inductors (e.g., 10µH) and predictable EMI filter design. |
| Quiescent Current | 45μA (non-switching), 2μA (shutdown) - extends battery life in always-on or standby systems. |
| Feedback Reference | 0.596V ±2.5% - allows accurate output setting (e.g., 5V with 100kΩ/13.3kΩ divider) with minimal error across temperature. |
| Thermal Shutdown | 160°C activation with 10°C hysteresis - protects against sustained overload or poor PCB thermal design while enabling automatic recovery. |
| EMI Reduction | Frequency spread spectrum (±6% jitter, 1/512 swing frequency) - lowers peak EMI by >10dB without added shielding or filtering components. |
Pinout & Package
SOT-23-THIN (6-pin) package, 2.9mm × 2.8mm footprint, with exposed pad for thermal enhancement (RθJA = 118.9°C/W on standard PCB).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power and signal ground reference | Return path for low-side MOSFET source and controller circuitry; must be connected at single point near FB divider for stable regulation. |
| SW (Pin 2) | Switch node | Connection between high- and low-side MOSFETs; drives external bootstrap capacitor and carries high di/dt; requires tight layout to minimize EMI. |
| VIN (Pin 3) | Main input supply | Drain of high-side MOSFET; accepts 4.5V–28V; requires local 10µF ceramic decoupling capacitor placed adjacent to pin. |
| FB (Pin 4) | Feedback input | Compares output voltage (via resistor divider) to 0.596V reference; high-impedance input (IIN < 100nA) minimizes divider current error. |
| EN (Pin 5) | Enable control | Logic-level input (1.23V rising threshold); floating enables operation; internal pullup allows simple on/off control without external bias. |
| BOOT (Pin 6) | High-side gate drive supply | Requires 0.1µF X7R/X5R ceramic capacitor to SW; UVLO disables high-side if BOOT–SW < 2.1V, preventing shoot-through. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | 85mΩ high-side + 40mΩ low-side MOSFETs enable 3A output in SOT-23-THIN without external switches or drivers. |
| Advanced Eco-mode | Pulse-skipping below 500mA peak inductor current improves light-load efficiency (>85% at 10mA) without audible noise. |
| Internal Soft Start | 5ms ramp time limits inrush current during power-up, eliminating need for external soft-start circuitry. |
| Overvoltage Protection | 108% VREF trip (≈0.644V) forces high-side off; recovers at 104% (≈0.620V) - suppresses output overshoot during load dump or fault recovery. |
| Robust Fault Handling | Hiccup-mode OCP (512-cycle wait, 16384-cycle restart) and thermal shutdown (160°C/150°C hysteresis) ensure safe operation under sustained faults. |
Applications
| White Goods Power Supply | Audio System DC/DC |
|---|---|
Use Scenario: Regulating 24V bus to 5V/3.3V for microcontrollers, sensors, and display logic in refrigerators, washing machines, and dishwashers. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing isolated, low-noise, and thermally robust 3A output with hiccup-mode fault containment. Use Value: Enables compact, fanless power design meeting IEC 60335 safety requirements while surviving motor-induced transients and ambient temperatures up to 85°C. | Use Scenario: Converting 12V supply to clean 5V rail for DACs, op-amps, and digital audio processors in home theater receivers and soundbars. IC Role / Device Role / Timing Role: EMI-optimized step-down converter delivering low-ripple, low-noise power with spread-spectrum switching to avoid interference with analog audio paths. Use Value: Reduces conducted EMI by >10dB versus fixed-frequency alternatives, eliminating need for ferrite beads or LC filters in sensitive audio signal chains. |
| STB/DTV Power Management | Printer Mainboard Supply |
Use Scenario: Generating 3.3V/5V from 12V input for SoC, memory, and HDMI interface in set-top boxes and digital TVs. IC Role / Device Role / Timing Role: High-efficiency, fast-transient buck converter supporting dynamic load steps (1.5A in 10µs) with minimal output deviation (±5%). Use Value: Maintains stable core voltage during burst data transfers and channel changes, preventing video artifacts or firmware resets. | Use Scenario: Providing 5V/3A for print engine controllers, stepper motor drivers, and sensor interfaces in inkjet/laser printers. IC Role / Device Role / Timing Role: Industrial-grade buck regulator with thermal hiccup and overcurrent protection to withstand frequent motor stall events and hot ambient environments. Use Value: Survives repeated short-circuit conditions on motor outputs without latch-up or permanent damage, reducing field failure rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54302DRCT | Same silicon, 3mm × 3mm SON-8 package with thermal pad; higher current capability (3.5A) due to lower RθJA (57.2°C/W vs 118.9°C/W). | Better suited for high-ambient or high-duty-cycle applications where thermal headroom is constrained. | Select TPS54302DRCT when board space allows larger package and thermal performance is prioritized over minimal footprint. |
| MP2332HG-5-LF-Z | Monolithic 3A buck with 4.5–28V input, but fixed 500kHz fSW, no spread spectrum, and 0.8V reference; requires external compensation. | Lacks integrated EMI reduction and internal loop compensation - increases BOM count and layout sensitivity. | Choose MP2332HG-5-LF-Z only if cost is primary constraint and EMI compliance can be achieved via external filtering. |
Compared with TPS54302DDCT, TPS54302DRCT offers superior thermal performance in a slightly larger package, while MP2332HG-5-LF-Z trades EMI robustness and integration for lower unit cost - making TPS54302DDCT optimal for space-constrained, EMI-sensitive industrial and consumer designs requiring zero-compensation simplicity.
Availability
TPS54302DDCT is available at Aetrix Electronics and suitable for white goods, audio systems, STB/DTV, and printer power supply designs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS54302DDCT 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 TPS54302DDCT belongs to TI's high-density synchronous buck converter product line, designed specifically for space-constrained industrial and consumer applications demanding low EMI, high efficiency across load range, and robust fault protection without external complexity.
FAQ
What is the maximum input voltage rating for the TPS54302DDCT?
The TPS54302DDCT has an absolute maximum input voltage rating of 30V, but its recommended operating input voltage range is 4.5V to 28V. Operation above 28V may trigger VIN UVLO hysteresis (3.3–3.9V falling threshold) or degrade long-term reliability. The device is commonly deployed on 12V and 24V industrial buses within this validated range.
Does the TPS54302DDCT require external compensation components?
No, the TPS54302DDCT includes fully internal loop compensation, eliminating the need for external RC networks on the COMP or FB pins. This simplifies design, reduces BOM count, and ensures stable operation with standard output capacitors (e.g., 22µF ceramic) across its full 3A load range and input voltage span.
How does the TPS54302DDCT achieve EMI reduction?
The TPS54302DDCT achieves EMI reduction through built-in frequency spread spectrum modulation: ±6% dither around its 400kHz center frequency with a 1/512 swing rate (1.024ms period). This spreads energy across a wider bandwidth, lowering peak emissions by >10dB compared to fixed-frequency operation - verified per CISPR-22 Class B standards in reference designs.
What protection features are integrated into the TPS54302DDCT?
The TPS54302DDCT integrates overcurrent protection (hiccup-mode on both high- and low-side MOSFETs), overvoltage protection (108% trip, 104% recovery), thermal shutdown (160°C activation, 150°C recovery), input UVLO (4.1V rising threshold), and BOOT UVLO (2.1V). All protections are fully autonomous and require no external circuitry.
Can the TPS54302DDCT safely start into a prebiased output?
Yes, the TPS54302DDCT implements safe start-up into prebiased outputs: both high- and low-side MOSFETs remain disabled until the internal soft-start voltage exceeds the FB pin voltage, preventing reverse current flow and output discharge. This behavior is confirmed in TI's SLVSDG6C datasheet Section 6.3.6 and validated in reference design testing.
TPS54302DDCT 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):
- 28V
- Voltage - Output (Min/Fixed):
- 0.596V
- Voltage - Output (Max):
- 28V
- Current - Output:
- 3A
- Frequency - Switching:
- 400kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
TPS54302DDCT FAQ
1.How can I place an order for TPS54302DDCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54302DDCT 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 TPS54302DDCT reliable?
The price and inventory of TPS54302DDCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54302DDCT is usually 5 days.
3.What payment methods are accepted for TPS54302DDCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54302DDCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54302DDCT?
TPS54302DDCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54302DDCT 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 TPS54302DDCT?
For technical support, including TPS54302DDCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54302DDCT requirements.
6.How does Aetrix verify that TPS54302DDCT is sourced from the original manufacturer or authorized distributors?
All TPS54302DDCT 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 TPS54302DDCT meets industry standards.
7.What is the process for return or replacement of TPS54302DDCT?
All TPS54302DDCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS54302DDCT, 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 TPS54302DDCT part is unused and in its original packaging.
Return procedure for TPS54302DDCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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