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Texas Instruments TPS5431DDA
- Part No.:
- TPS5431DDA
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS5431DDA.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:1,610
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Product details
Overview
TPS5431DDA from Texas Instruments is a 3A, wide-input-range synchronous step-down DC/DC converter with integrated 100mΩ high-side N-channel MOSFET, 5.5V–23V input range, fixed 500kHz switching frequency, and adjustable output down to 1.22V (±1.5% initial accuracy), used in 12V/24V distributed power systems and industrial audio supplies.
For engineers reviewing the TPS5431DDA datasheet, TPS5431DDA pinout, TPS5431DDA application, or TPS5431DDA equivalent, key selection criteria include input voltage ceiling (23V max), thermal performance in HSOIC-8 PowerPAD™, internal compensation for minimal external parts, and hiccup-mode overcurrent protection for robust load fault handling.
Technical Context
The TPS5431DDA implements voltage-mode PWM control with input voltage feed-forward to maintain constant power-stage gain across its 5.5V–23V input range, improving line regulation and transient response. Its internal 1.221V bandgap reference and type-3 compensation network enable stable operation without external compensation components.
Functional protection includes cycle-by-cycle overcurrent limiting (4.0–6.0A peak), thermal shutdown at 135°C–162°C with 14°C hysteresis, and overvoltage protection triggered at 112.5% × VREF. The ENA pin supports active-high enable with 1.3V rising threshold and 0.5V falling threshold, plus internal 1.5MΩ pullup for floating-pin operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5.5V to 23V - defines maximum rail compatibility; exceeds 12V/19V automotive and industrial bus requirements. |
| Output Current | 3A continuous - supports mid-power loads like LCD displays or car audio amplifiers without external current boosting. |
| Switching Frequency | 500kHz ±100kHz - enables compact magnetics and low-output-ripple designs with standard 15µH inductors. |
| Feedback Reference | 1.221V ±0.024V - sets minimum output voltage and determines resistor-divider accuracy for precise VOUT programming. |
| High-Side RDS(on) | 100mΩ typical at 12V VIN - directly determines conduction loss and thermal rise under full 3A load. |
| Shutdown Current | 15µA typical - enables ultra-low-power standby in battery-backed or energy-sensitive systems. |
| Junction Temp Range | –40°C to +125°C - qualifies for under-hood automotive and industrial ambient environments without derating. |
Pinout & Package
The TPS5431DDA is housed in an 8-pin HSOIC package with exposed thermal pad (PowerPAD™), requiring solder connection of the DAP to PCB ground plane for thermal integrity and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap capacitor node | Supplies gate drive voltage for high-side MOSFET; requires 0.01µF X7R/X5R ceramic between BOOT and PH. |
| NC (2,3) | No-connect terminals | Internally unconnected; must remain unpopulated or floating-no routing or termination permitted. |
| VSENSE | Feedback input | Monitors output divider midpoint; regulates VOUT by comparing to 1.221V reference with ±1.5% accuracy. |
| ENA | Enable control input | Active-high logic: ≥1.3V enables regulation; ≤0.5V disables switching and reduces IQ to 15µA. |
| GND | Power and signal ground | Reference for all analog circuits; must be connected to DAP (exposed thermal pad) for thermal and EMI performance. |
| VIN | Main input supply | Accepts 5.5V–23V; requires local 10µF ceramic bypass within 1mm of pin to minimize switching noise coupling. |
| PH | Power switch node | Connects to inductor and catch diode; carries high di/dt switching current-requires tight layout and Kelvin grounding. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 100mΩ High-Side MOSFET | Eliminates external switch and driver, reducing BOM count and PCB area while enabling >95% peak efficiency at 3A. |
| Internal Compensation Network | Removes need for external Type-3 compensation components, simplifying design and improving production consistency. |
| Voltage Feed-Forward Control | Maintains constant loop gain across input voltage variations, yielding superior line transient response without tuning. |
| Hiccup-Mode Overcurrent Protection | Shuts down regulator for 13–20ms upon sustained overload, then auto-restarts-prevents thermal runaway during short-circuit faults. |
| Thermal Shutdown with Hysteresis | Disables output at 135°C–162°C junction temp and re-enables only after 14°C cooldown-ensures safe recovery without oscillation. |
Applications
| Industrial Power Supply | Automotive Audio System |
|---|---|
Use Scenario: 24V truck-mounted display powering 5V logic and backlight circuitry in harsh temperature environments. IC Role / Device Role / Timing Role: Primary buck regulator converting 12V–23V vehicle battery to stable 5V rail with fast line transient response. Use Value: Input voltage feed-forward ensures consistent regulation during engine cranking dips; –40°C to +125°C rating guarantees reliability under hood. | Use Scenario: Compact Class-D amplifier supply in premium car audio head unit with space-constrained PCB layout. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter delivering 3A at 12V from 13.8V nominal battery rail. Use Value: Integrated MOSFET and internal compensation reduce component count by ≥4 vs discrete solutions; 500kHz switching minimizes inductor size. |
| LED Backlight Driver | Battery Charger Auxiliary Rail |
Use Scenario: Constant-current LED string driver in commercial LCD signage using 12V input and adjustable 18–36V output. IC Role / Device Role / Timing Role: Adjustable-output buck controller regulating feedback via external op-amp to set LED current. Use Value: 1.22V reference and wide VOUT adjustability support precise current-sense amplifier interface; 3A capability drives multi-string arrays. | Use Scenario: Auxiliary 3.3V/5V rail generation in smart Li-ion battery charger managing USB-C PD negotiation and MCU power. IC Role / Device Role / Timing Role: Secondary regulated supply isolated from main charging path, enabled only during communication phases. Use Value: 15µA shutdown current extends battery life during idle; ENA pin allows synchronized enable/disable with USB enumeration state. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS5430DDA | Wider 5.5V–36V input range; identical pinout, package, and feature set except UVLO and max VIN ratings. | Suitable where input may exceed 23V (e.g., 24V industrial buses with surge tolerance); not rated for 23V-only designs with strict margining. | Select TPS5430DDA only if system requires >23V input headroom; otherwise TPS5431DDA offers tighter voltage stress margins. |
| MP2332HG-50 | 3A, 4.5V–36V input, 500kHz, but uses current-mode control and lacks internal feed-forward; 1.215V ref, no hiccup OCP. | Requires external compensation; less robust line transient response; different fault-handling behavior under overload. | Choose MP2332HG-50 when cost sensitivity outweighs need for feed-forward line regulation or hiccup-mode safety. |
Compared with TPS5430DDA, the TPS5431DDA trades input voltage headroom for tighter thermal and voltage stress margins at 23V rails; versus MP2332HG-50, it delivers superior line regulation and integrated protection-critical for automotive and industrial reliability.
Availability
TPS5431DDA is available at Aetrix Electronics and suitable for industrial power supplies, automotive audio systems, LED backlight drivers, and battery charger auxiliary rails requiring stable component supply across extended temperature and voltage ranges.
Supply support for TPS5431DDA 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 decades of expertise in high-reliability power conversion ICs.
The TPS543x product line was engineered for compact, high-efficiency DC/DC conversion in space-constrained industrial, automotive, and consumer electronics-emphasizing integration, thermal resilience, and ease of design.
FAQ
What is the maximum input voltage rating for the TPS5431DDA?
The TPS5431DDA has an absolute maximum input voltage rating of 25V and a recommended operating range of 5.5V to 23V. Exceeding 23V during normal operation risks violating the device's safe operating area, especially under thermal stress or transients. The 25V absolute max is a damage threshold-not a functional limit-and should never be approached in design.
Does the TPS5431DDA require external compensation components?
No, the TPS5431DDA features an internally compensated voltage-mode control loop optimized for stability with standard output filter configurations. This eliminates the need for external compensation networks such as RC or RCD networks typically required in open-loop buck controllers, reducing BOM count and layout complexity.
How does the ENA pin function on the TPS5431DDA?
The ENA pin on the TPS5431DDA is an active-high enable input with a 1.3V rising threshold and 0.5V falling threshold. When pulled above 1.3V, the device initiates soft-start and begins regulation; below 0.5V, it enters shutdown mode drawing just 15µA. An internal 1.5MΩ pullup allows floating ENA for default-enable operation.
What thermal pad connection is required for the TPS5431DDA DDA package?
The exposed thermal pad (DAP) on the TPS5431DDA's HSOIC-8 PowerPAD™ package must be soldered to a PCB copper pour tied to GND. This connection is mandatory-not optional-for both thermal dissipation (reducing θJA from 45°C/W to ~15°C/W) and electrical stability, as the DAP serves as the primary GND return path for high-frequency switching currents.
Can the TPS5431DDA be used in a 12V-to-5V application with 3A output?
Yes, the TPS5431DDA is validated for 12V-to-5V conversion at up to 3A continuous output. TI provides reference schematics (e.g., SLVS632L Figure 7-1) confirming this configuration, including recommended 15µH inductor, 0.01µF BOOT capacitor, and resistor divider values (R1=10kΩ, R2=3.24kΩ) to achieve 5.0V ±1.5% accuracy across temperature.
TPS5431DDA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 5.5V
- Voltage - Input (Max):
- 23V
- Voltage - Output (Min/Fixed):
- 1.221V
- Voltage - Output (Max):
- 20.47V
- Current - Output:
- 3A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
TPS5431DDA FAQ
1.How can I place an order for TPS5431DDA through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS5431DDA 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 TPS5431DDA reliable?
The price and inventory of TPS5431DDA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS5431DDA is usually 5 days.
3.What payment methods are accepted for TPS5431DDA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS5431DDA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS5431DDA?
TPS5431DDA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS5431DDA 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 TPS5431DDA?
For technical support, including TPS5431DDA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS5431DDA requirements.
6.How does Aetrix verify that TPS5431DDA is sourced from the original manufacturer or authorized distributors?
All TPS5431DDA 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 TPS5431DDA meets industry standards.
7.What is the process for return or replacement of TPS5431DDA?
All TPS5431DDA units undergo pre-shipment inspection (PSI). If there is an issue with TPS5431DDA, 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 TPS5431DDA part is unused and in its original packaging.
Return procedure for TPS5431DDA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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