TPS5430DDAR - 3A, 36V Step-Down Converter | Texas Instruments
MPN: TPS5430DDAR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.28 | $228.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.85 | $1,850.00 |
Drop-in alternatives for TPS5430DDAR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TPS5430DDA
β Drop-Inπ Reference alternative (not in catalog)
TPS5450DDAR
β Drop-Inπ Reference alternative (not in catalog)
TPS5431DDAR
β Drop-Inπ Reference alternative (not in catalog)
RT8279GSP
β Drop-Inπ Reference alternative (not in catalog)
RT8289GSP
β Drop-Inπ Reference alternative (not in catalog)
TPS5430DDAR Maximum Ratings & Electrical Characteristics
| Function | Step-Down (Buck) Converter |
| Output Type | Adjustable |
| Output Voltage Range | 1.221V to 36V |
| Maximum Output Current | 3A |
| Input Voltage Range | 5.5V to 36V |
| Switching Frequency | 500kHz |
| Synchronous Rectification | Yes |
| High-Side MOSFET RDS(on) | 0.2 ohm (typical) |
| Reference Voltage | 1.221V |
| Efficiency | Up to 95% |
| Operating Temperature Range | -40Β°C to +125Β°C |
| Package | 8-Pin HSOIC (DDA) PowerPAD |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Control Architecture | Current Mode |
TPS5430DDAR Pin Configuration
| Pin 1 | BOOT β Bootstrap capacitor connection for high-side MOSFET driver |
| Pin 2 | VIN β Input supply voltage |
| Pin 3 | EN β Enable pin (active high) |
| Pin 4 | VSENSE β Feedback voltage sense for output regulation |
| Pin 5 | GND β Ground |
| Pin 6 | GND β Ground |
| Pin 7 | PH β Switch node output |
| Pin 8 | GND β Ground |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TPS5430DDAR is suitable for 6 applications: Industrial Power Supplies, Automotive Electronics, Telecom and Networking Equipment, FPGA and DSP Power Supplies, Battery-Powered Devices, LED Lighting Systems.
Industrial Power Supplies
The TPS5430DDAR is ideal for industrial power supplies that require a wide input voltage range (5.5V to 36V) and high efficiency. It can step down 24V industrial bus voltages to 5V or 3.3V for logic circuits, sensors, and microcontrollers. Its 3A output current is sufficient for powering multiple loads, and the 500kHz switching frequency allows for compact designs. The device's thermal shutdown and current limit features ensure reliable operation in harsh industrial environments.
Recommended
Automotive Electronics
In automotive applications, the TPS5430DDAR can regulate 12V battery voltage down to 5V or 3.3V for infotainment systems, ADAS modules, and sensors. Its wide input range handles voltage transients, and the -40Β°C to +125Β°C operating temperature range meets automotive requirements. The high efficiency reduces heat generation, which is critical in enclosed automotive environments. The PowerPAD package aids in thermal management.
Recommended
Telecom and Networking Equipment
The TPS5430DDAR is well-suited for telecom and networking equipment that operates from 12V or 24V rails. It provides a stable 3.3V or 5V supply for FPGAs, ASICs, and line cards. The 500kHz switching frequency allows for small external components, saving board space in dense networking gear. Its high efficiency reduces power loss and cooling requirements, improving overall system reliability.
Recommended
FPGA and DSP Power Supplies
FPGAs and DSPs often require multiple voltage rails with high current and low ripple. The TPS5430DDAR can provide a 3.3V or 2.5V rail with up to 3A, suitable for core and I/O supplies. Its fast transient response and current-mode control ensure stable operation under dynamic loads. The adjustable output voltage allows flexibility in setting the exact voltage required by the FPGA or DSP.
Recommended
Battery-Powered Devices
For battery-powered devices, the TPS5430DDAR's high efficiency (up to 95%) extends battery life. It can step down a battery voltage (e.g., 12V Li-ion) to a lower voltage for the system. The wide input range accommodates battery voltage variations. The device's low quiescent current in shutdown mode helps conserve power when the system is idle.
Recommended
LED Lighting Systems
The TPS5430DDAR can be used in LED lighting systems to step down a 24V supply to a constant voltage for LED drivers. Its high efficiency reduces heat, and the adjustable output allows setting the appropriate voltage for the LED string. The 500kHz switching frequency enables small inductors, making the solution compact for LED modules.
Recommended
Recommended Products Summary
Engineering reference data for TPS5430DDAR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS5430DDA | TPS5450DDAR | RT8279GSP |
|---|---|---|---|---|
| Package | 8-Pin HSOIC (DDA) | 8-Pin HSOIC (DDA) | 8-Pin HSOIC (DDA) | 8-Pin SOP (Exposed Pad) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Richtek |
| Input Voltage Range | 5.5V to 36V | 5.5V to 36V | 5.5V to 36V | 4.5V to 23V |
| Output Current | 3A | 3A | 5A | 3A |
| Switching Frequency | 500kHz | 500kHz | 500kHz | 340kHz |
| Synchronous Rectification | Yes | Yes | Yes | Yes |
| Operating Temperature Range | -40Β°C to +125Β°C | -40Β°C to +125Β°C | -40Β°C to +125Β°C | -40Β°C to +85Β°C |
| Enable Pin | Yes | Yes | Yes | Yes |
Key Differentiators
- Wide input voltage range up to 36V (vs RT8279GSP)
- Higher switching frequency (500kHz) (vs RT8279GSP)
- Higher output current option (TPS5450DDAR) (vs TPS5430DDAR)
Design Notes
For optimal performance, place the input capacitor (10uF) and output capacitor (22uF) as close to the VIN and PH pins as possible. Use short, wide traces for high-current paths. The exposed PowerPAD must be soldered to a large copper area with thermal vias to dissipate heat effectively.
The TPS5430DDAR can dissipate significant power at high input-output voltage differences. For example, at 24V input, 5V output, and 3A load, power dissipation is approximately 57W (assuming 90% efficiency). Ensure adequate copper area and airflow to keep the junction temperature below 125Β°C. The PowerPAD is essential for heat sinking.
Do not exceed the absolute maximum input voltage of 36V. The bootstrap capacitor (BOOT) must be placed close to the BOOT and PH pins to ensure proper high-side MOSFET driving. Use a 0.1uF ceramic capacitor for BOOT. Also, ensure the feedback resistor divider uses 1% tolerance resistors to maintain output voltage accuracy.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified; for automotive, consider TPS5430QDDARQ1 if available.
