Manufacturer: Texas Instruments

Key Specifications

• Package: SOIC-8 (DDA)
• Output Current: 3A
• Input Voltage Range: 5.5V to 36V
• Output Voltage Range: 1.22V to 31V (adjustable)
• Switching Frequency: 500kHz
• Operating Temperature: -40°C to 125°C
• Synchronous Rectification: No (external diode)
• Control Architecture: Voltage Mode

Product Overview

The TPS5430DDAR from Texas Instruments is a high-performance step-down (buck) DC-DC converter designed for applications requiring efficient power conversion from a wide input voltage range. It delivers up to 3A of continuous output current with an adjustable output voltage from 1.22V to 31V, making it versatile for various power supply designs. The device operates at a fixed 500kHz switching frequency, allowing for small external components and reduced output ripple.

Key Features

• Wide input voltage range: 5.5V to 36V, suitable for automotive, industrial, and telecom power rails.
• High efficiency up to 95% (typical, depending on operating conditions) due to low RDS(on) internal MOSFET.
• Adjustable output voltage via external resistor divider, with 1.22V reference.
• Fixed 500kHz switching frequency enables compact inductor and capacitor selection.
• Built-in overcurrent protection, thermal shutdown, and input undervoltage lockout.
• Available in industry-standard SOIC-8 (DDA) package, easy for PCB layout and thermal dissipation.

Applications

• Distributed power systems
• Industrial control and automation
• Automotive infotainment and body electronics
• Telecommunication and networking equipment
• Point-of-load (POL) converters

Selection Guidance

When selecting the TPS5430DDAR, consider the input voltage range, required output voltage and current, and thermal conditions. The device requires an external Schottky diode for operation (non-synchronous). For lower output voltages, ensure the feedback resistor network is properly calculated. For higher efficiency at light loads, evaluate the power dissipation and consider alternative synchronous converters if needed. Always refer to the datasheet for detailed design equations and recommended component values.