tps5430ddar 5.5v to 36v, 3a, 500 khz step down power ic – texas instruments

TPS5430DDAR – 3A Step Down DC-DC Converter – Texas Instruments

Key features:

  • Wide input voltage range: 5.5V to 36V
  • Output current: up to 3A continuous (4A peak)
  • Adjustable output voltage: 1.22V to 31V
  • Fixed switching frequency: 500 kHz
  • High efficiency: up to 95%
  • Integrated 110 mΩ high-side N‑channel MOSFET
  • Internal compensation minimizes external parts count
  • Enable pin for low‑current shutdown (15 µA typical)
  • Overcurrent limiting, overvoltage protection, and thermal shutdown
  • Operating temperature range: -40°C to +125°C
  • 8-pin SOIC PowerPAD™ package
  • RoHS compliant

 

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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.

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