TPS5430DDAR 3A Buck Regulator for Industrial Power Systems
Couldn't load pickup availability
Have questions about this product? Our team is here to help — just reach out on WhatsApp.
💬 Contact Us on WhatsAppAbout the Product
TPS5430DDAR 3A Step-Down Buck Regulator | DC/DC Converter
The TPS5430DDAR is a 3A step-down buck regulator from the DC/DC converter family — a wide-input-range buck with an integrated high-side N-channel MOSFET (110mΩ). The wide 5.5V to 36V input range and 500kHz fixed switching frequency make it a workhorse part for 12V / 24V industrial power rails, embedded compute boards, and motor-drive auxiliary supplies.
The part delivers up to 95% efficiency at typical load, with ±1% output voltage accuracy across line and load conditions. Built-in protections include over-current (OCP), over-temperature (OTP), under-voltage lockout (UVLO), and short-circuit protection. The SOIC-8 PowerPAD (DDA) package provides the thermal dissipation path needed for the integrated FET at full load.
When to Replace the TPS5430DDAR
- Output rail dead while input voltage is present — internal MOSFET failed open or short.
- Output rail unstable / drooping under load — degraded controller or feedback loop.
- SW pin shows no switching activity on scope despite valid VIN and enable.
- Visible damage on the SOIC-8 package — burnt or cracked plastic.
TPS5430DDAR Specifications
| Feature | Specification |
|---|---|
| Manufacturer | Original |
| Family | DC/DC Converter |
| Type | Step-Down (Buck) Regulator |
| Input Voltage Range | 5.5V to 36V |
| Output Current | 3A continuous |
| Switching Frequency | 500kHz |
| Internal MOSFET (RDS(on)) | 110mΩ (high-side N-channel) |
| Peak Efficiency | Up to 95% |
| Output Accuracy | ±1% (line), ±0.5% (load) |
| Protections | OCP / OTP / UVLO / Short-Circuit |
| Operating Temperature | -40°C to +125°C |
| Package | 8-pin SOIC PowerPAD (DDA suffix, 4.9×3.9mm) |
FAQ — TPS5430DDAR Buck Regulator
Q: Does the TPS5430 need an external Schottky diode?
A: Yes — the TPS5430 integrates the high-side MOSFET only. A low-side Schottky rectifier diode is required externally to complete the buck topology. Match the diode's reverse-voltage rating to the input voltage with margin.
Q: How do I set the output voltage?
A: External feedback resistor divider from the output to the VSENSE pin (1.221V reference). TI's datasheet has the standard divider formula and provides example values for common output rails (3.3V, 5V, 12V).
Q: Rework profile for SOIC-8 PowerPAD?
A: Hot air at 350°C. The exposed pad on the package bottom must reflow with the PCB's thermal pad — apply solder paste to the thermal pad before placing the chip, then reflow with controlled airflow.
Q: Bulk pricing?
A: Yes — email contact@lys-sz.com for tray-quantity pricing.
Related products
- TPS54561DPRR 5A Buck Converter (60V WSON-10)
- TPS767D301PWP Dual LDO Regulator
- TPS53647RTAR PMBus Buck Controller
- HBR3200/SS320 Schottky Diode
Sourcing TPS5430DDAR buck regulators in tray quantities? Email contact@lys-sz.com for bulk pricing on TI power management stock. Worldwide shipping from our Shenzhen warehouse.
Buying in bulk for a mining farm or repair shop?
Get dedicated B2B pricing on this part and across our full catalog — quote response within 24 hours, payment by T/T USD bank wire, and DDP delivery available for US & EU customers (and other lanes on request).
