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Texas Instruments TPS5431DDARG4
- Part No.:
- TPS5431DDARG4
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS5431DDARG4.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:2,976
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Product details
Overview
TPS5431DDARG4 from Texas Instruments is a 3A synchronous step-down (buck) DC-DC converter with integrated 100mΩ high-side N-channel MOSFET, designed for wide-input industrial and automotive power rails up to 23V. It delivers adjustable output down to 1.22V with ±1.5% initial accuracy, operates at fixed 500kHz switching frequency, and features internal compensation, input voltage feedforward, and comprehensive protection including overcurrent limiting, overvoltage protection, and thermal shutdown.
For engineers reviewing the TPS5431DDARG4 datasheet, TPS5431DDARG4 pinout, TPS5431DDARG4 application, or TPS5431DDARG4 equivalent, key selection considerations include its 5.5–23V input range, 3A continuous output capability, SOIC-8 PowerPAD™ thermal package, ENA-controlled enable functionality, and suitability for space-constrained 12V/24V distributed power systems requiring stable regulation under transient load and line conditions.
Technical Context
The TPS5431DDARG4 implements constant-frequency voltage-mode PWM control with integrated voltage feedforward, enabling consistent loop gain across input voltage variations and improving line regulation and transient response. Its internal error amplifier (gain = 25) and type-3 compensation network eliminate external compensation components while maintaining high phase margin and stability.
It integrates a bootstrap gate driver with internal recharge diode, requiring only a 0.01μF ceramic capacitor between BOOT and PH pins. Protection logic includes cycle-by-cycle overcurrent detection (4.0–6.0A peak limit), hiccup-mode fault recovery, 112.5% × VREF overvoltage shutdown, and thermal shutdown at 135–162°C with 14°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5.5V to 23V - supports 12V and 24V nominal bus systems with headroom for transients and ripple. |
| Output Current | 3A continuous - sufficient for powering FPGAs, microcontrollers, and display backlight drivers in compact designs. |
| Switching Frequency | Fixed 500kHz - enables small external inductors (e.g., 15μH) and reduces output filter size without compromising efficiency. |
| Feedback Reference | 1.221V ±1.5% - sets minimum output voltage; used with external resistor divider to configure precise output levels. |
| High-Side RDS(on) | 100mΩ typical at 12V VIN - contributes to ≥95% peak efficiency and low thermal dissipation in SOIC-8 PowerPAD™ package. |
| Enable Threshold | 1.3V rising / 0.5V falling - allows direct interfacing with standard logic outputs or open-drain controllers for sequencing. |
| Thermal Resistance | RθJA = 45°C/W (EVM), RθJC(bot) = 6°C/W - requires DAP soldering to PCB copper for reliable 3A operation at 125°C junction temperature. |
Pinout & Package
The TPS5431DDARG4 is housed in an 8-pin HSOIC (DDA) package with exposed thermal pad (DAP), optimized for high-power density and thermal performance in space-constrained applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap capacitor node | Connects 0.01μF X7R/X5R ceramic capacitor to PH; supplies gate drive voltage for integrated high-side MOSFET. |
| NC (2,3) | No-connect terminals | Internally unconnected; must remain floating-no routing or grounding required. |
| VSENSE | Feedback input | Monitors output voltage via external resistor divider; regulates output by comparing to 1.221V reference. |
| ENA | Enable control input | Active-high logic interface; 15μA shutdown current when pulled ≤0.5V; internal 1.5MΩ pullup allows floating operation. |
| GND | Power and signal ground | Reference for all internal circuits; must be connected to DAP (exposed thermal pad) for thermal and electrical integrity. |
| VIN | Main input supply | Accepts 5.5–23V; requires local 10μF ceramic bypass capacitor within 1mm of pin to minimize noise and ESR-related losses. |
| PH | Power switch node | Drives external inductor and catch diode; connects directly to source of integrated high-side MOSFET and BOOT capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 100mΩ high-side MOSFET | Eliminates external switch and driver, reducing BOM count and layout area while enabling >95% efficiency at 3A. |
| Internal compensation network | Removes need for external compensation components, simplifying design and improving consistency across production units. |
| Voltage feedforward architecture | Maintains constant power-stage gain across input voltage range, improving line regulation and reducing output overshoot during VIN steps. |
| 500kHz fixed-frequency PWM | Enables predictable EMI filtering and smaller passive components versus variable-frequency alternatives. |
| Comprehensive protection suite | Includes cycle-by-cycle overcurrent, hiccup-mode fault recovery, overvoltage shutdown (112.5% × VREF), and thermal shutdown with hysteresis. |
Applications
| Industrial 12V Distributed Power | Automotive Infotainment Supply |
|---|---|
Use Scenario: Powering FPGA I/O banks and microcontroller peripherals in programmable logic controllers (PLCs) operating from 12V rail. IC Role / Device Role / Timing Role: Primary point-of-load regulator converting 12V to 3.3V/1.8V with tight load regulation and fast transient response. Use Value: Internal compensation and feedforward ensure stable output under rapid load steps common in industrial I/O switching. |
Use Scenario: Generating 5V supply for LCD display controller and audio DSP in car head units powered from 12V battery with cold-crank tolerance. IC Role / Device Role / Timing Role: Buck converter with UVLO (5.3V) and thermal shutdown protecting against brownout and enclosure overheating. Use Value: 5.5–23V input range accommodates battery voltage swings from 9V (cold crank) to 16V (load dump), ensuring uninterrupted operation. |
| LED Backlight Driver Support | High-Power Battery Charger Auxiliary Rail |
Use Scenario: Providing regulated 12V bias for constant-current LED driver ICs in commercial signage and retail displays. IC Role / Device Role / Timing Role: High-efficiency pre-regulator stepping down 24V bus to stable 12V, reducing heat in downstream LED drivers. Use Value: 3A output capacity and 95% peak efficiency minimize thermal stress in enclosed display enclosures. |
Use Scenario: Generating isolated 3.3V control rail for charger management MCU and communication interfaces in multi-cell Li-ion battery chargers. IC Role / Device Role / Timing Role: Secondary buck regulator deriving clean logic supply from main charging converter's 24V intermediate bus. Use Value: ENA pin enables synchronized startup/shutdown with charger state machine, reducing system standby current to 15μA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS5430DDARG4 | Wider 5.5–36V input range; otherwise identical pinout, package, and feature set. | Suitable for 24V bus systems with higher transient margins; not rated for 23V max like TPS5431DDARG4. | Select TPS5430DDARG4 if input may exceed 23V; verify thermal derating at higher VIN due to increased power loss. |
| LM2678SD-ADJ/NOPB | 5A output, 8–40V input, 260kHz switching; external compensation required; no feedforward or OVP. | Better suited for high-current, lower-frequency designs where EMI is less critical and board space allows extra components. | Choose LM2678SD-ADJ/NOPB only when 5A output or wider input range outweighs added complexity and reduced transient performance. |
Compared with TPS5431DDARG4, TPS5430DDARG4 extends input range but shares identical thermal, pinout, and protection behavior-ideal for design reuse across 12V/24V platforms. LM2678SD-ADJ/NOPB offers higher current but lacks integrated feedforward and OVP, increasing design effort and reducing robustness in dynamic line/load environments.
Availability
TPS5431DDARG4 is available at Aetrix Electronics and suitable for industrial PLCs, automotive infotainment systems, and LED display power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS5431DDARG4 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, serving industrial, automotive, and consumer markets with high-reliability silicon solutions.
The TPS543x product line delivers highly integrated, thermally optimized buck converters for space- and efficiency-critical point-of-load applications in 12V/24V distributed power architectures.
FAQ
What is the maximum input voltage rating for the TPS5431DDARG4?
The TPS5431DDARG4 has an absolute maximum input voltage of 25V and a recommended operating range of 5.5V to 23V. Exceeding 23V may trigger overvoltage stress on internal circuitry and reduce reliability. The device incorporates undervoltage lockout (UVLO) with a typical rising threshold of 5.3V and 350mV hysteresis to ensure controlled startup and shutdown.
Does the TPS5431DDARG4 require external compensation components?
No, the TPS5431DDARG4 features fully internal compensation optimized for voltage-mode control with feedforward. This eliminates the need for external RC networks on the COMP or VSENSE pins, reducing bill-of-materials count and layout sensitivity while maintaining stability across load and input voltage variations.
How is thermal management handled in the TPS5431DDARG4 package?
The TPS5431DDARG4 uses an 8-pin HSOIC PowerPAD™ (DDA) package with an exposed thermal pad (DAP). For proper thermal performance, the DAP must be soldered to a large PCB copper area acting as a heatsink. With this implementation, the junction-to-board thermal resistance is 6°C/W, enabling reliable 3A operation at up to 125°C junction temperature.
Can the TPS5431DDARG4 be used in automotive applications?
Yes, the TPS5431DDARG4 supports –40°C to +125°C operating junction temperature and includes automotive-grade protections: undervoltage lockout, overvoltage protection (112.5% × VREF), cycle-by-cycle overcurrent limiting, and thermal shutdown with hysteresis. Its 5.5–23V input range covers cold-crank (≥9V) and load-dump (≤16V) conditions typical in 12V vehicle systems.
What is the function of the BOOT and PH pins on the TPS5431DDARG4?
The BOOT pin supplies gate-drive voltage to the integrated high-side MOSFET via a 0.01μF ceramic capacitor connected to the PH pin. The PH pin is the switching node-connecting to the inductor and catch diode-and serves as the source terminal of the internal MOSFET. Proper BOOT-to-PH capacitance ensures robust high-side drive and prevents shoot-through during switching transitions.
TPS5431DDARG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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
TPS5431DDARG4 FAQ
1.How can I place an order for TPS5431DDARG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS5431DDARG4 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 TPS5431DDARG4 reliable?
The price and inventory of TPS5431DDARG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS5431DDARG4 is usually 5 days.
3.What payment methods are accepted for TPS5431DDARG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS5431DDARG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS5431DDARG4?
TPS5431DDARG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS5431DDARG4 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 TPS5431DDARG4?
For technical support, including TPS5431DDARG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS5431DDARG4 requirements.
6.How does Aetrix verify that TPS5431DDARG4 is sourced from the original manufacturer or authorized distributors?
All TPS5431DDARG4 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 TPS5431DDARG4 meets industry standards.
7.What is the process for return or replacement of TPS5431DDARG4?
All TPS5431DDARG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS5431DDARG4, 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 TPS5431DDARG4 part is unused and in its original packaging.
Return procedure for TPS5431DDARG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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