The TPS5430DDAR is a high-performance, step‑down (buck) DC‑DC converter from Texas Instruments , part of the SWIFT™ family of power management devices . It integrates a high‑side N‑channel MOSFET and delivers up to 3A of continuous output current (4A peak) , making it suitable for a wide range of power conversion applications .

The device operates from a 5.5V to 36V input voltage range , supporting popular power rails such as 12V, 24V, and automotive systems . The output voltage is adjustable from 1.22V to 31V with ±1.5% initial accuracy, set using two external resistors .

Key design features include:

500 kHz fixed switching frequency – Enables the use of small inductors and capacitors, reducing overall solution size
Internal compensation – Simplifies design by eliminating external compensation networks
Voltage feed‑forward – Improves line regulation and transient response
Enable pin (ENA) – Allows the device to be put into a low‑current shutdown state (15 µA typical)

Protection features include overcurrent limiting, overvoltage protection, thermal shutdown, and undervoltage lockout (UVLO) that prevents startup until the input voltage reaches 5.5V .

The DDAR suffix indicates tape & reel packaging for automated assembly. The device is available in a thermally enhanced 8-pin SOIC PowerPAD™ (DDA) package that efficiently dissipates heat.

Parameters

Parameters	Specifications
Manufacturer	Texas Instruments
Part Number	TPS5430DDAR
Topology	Step‑down (buck) DC‑DC converter
Input Voltage Range	5.5V to 36V
Maximum Input Voltage	36V (absolute max 40V)
Output Current (Continuous)	3A
Peak Output Current	4A
Output Voltage Range	1.22V to 31V (adjustable)
Switching Frequency	Fixed 500 kHz
Efficiency	Up to 95%
Integrated MOSFET Resistance	110 mΩ (high‑side N‑channel)
Quiescent Current (Operating)	3 mA typical
Shutdown Current (Enable)	15 µA typical
Reference Voltage Accuracy	±1.5%
Operating Temperature	-40°C to +125°C
Package Type	8-pin SOIC PowerPAD™ (HSOP8 / DDA)
RoHS Compliant	Yes

Applications

Industrial power supplies – 24V to 5V / 3.3V conversion for PLCs, motor drives, and factory automation equipment
Consumer electronics – Set‑top boxes, LCD displays, high‑power audio systems
Telecommunications – Point‑of‑load (POL) regulators for 12V distributed power systems
Automotive aftermarket – Infotainment and vehicle electronics (within 36V rating)
Battery‑powered equipment – Efficient step‑down conversion from multi‑cell batteries
Portable devices – Smartphones, tablets, wireless devices requiring stable voltage regulation
12V/24V distributed power systems – POL regulation
Renewable energy systems – Solar inverters and energy storage systems

Note: The TPS5430DDAR is an active, in‑production device from Texas Instruments. The DDAR tape & reel variant is recommended for automated assembly; the TPS5430D variant is available in rail/tube packaging. For lower voltage applications (up to 23V), consider the TPS5431 variant.