TPS560430XFDBVT

Updated: 2026-09-15

Overview

The TPS560430XFDBVT is a synchronous buck converter IC manufactured by Texas Instruments, belonging to their family of high-efficiency DC-DC regulators. Designed in a compact SOT-23-6 package, this device integrates both high-side and low-side MOSFETs to simplify power supply designs. The converter operates across a wide 4.5V to 36V input range, making it suitable for various industrial and automotive applications. It delivers up to 600mA output current with excellent line and load regulation, featuring a fixed 500kHz switching frequency for predictable EMI performance.

Structure and Working Principle

The TPS560430XFDBVT utilizes a current-mode control architecture for fast transient response and stable operation. The integrated circuit contains a PWM controller, gate drivers, and power MOSFETs in a single package. The device employs synchronous rectification for higher efficiency compared to traditional diode-rectified converters. During operation, the internal control loop adjusts the duty cycle of the high-side MOSFET to maintain the desired output voltage. The low-side MOSFET activates during the freewheeling period to minimize conduction losses. An internal compensation network simplifies the design process while ensuring stability across various operating conditions.

Key Features

The TPS560430XFDBVT offers several notable features that make it attractive for power supply designs. Its high efficiency (up to 95%) reduces thermal dissipation requirements, while the wide input voltage range accommodates various power sources including 12V and 24V industrial systems. The device includes comprehensive protection features such as thermal shutdown, undervoltage lockout, and cycle-by-cycle current limiting. The fixed-frequency operation simplifies EMI filter design, and the integrated MOSFETs eliminate the need for external switching components, reducing board space and BOM count.

Application Areas

This voltage regulator finds extensive use in industrial control systems, automotive electronics, and distributed power architectures. It's particularly suitable for applications requiring point-of-load regulation where space is constrained but performance cannot be compromised. Common implementations include power supplies for FPGAs, DSPs, and microcontrollers in factory automation equipment, vehicle infotainment systems, and test/measurement instruments. The wide operating temperature range (-40°C to +125°C) makes it reliable for harsh environment applications.

Maintenance and Precautions

Proper PCB layout is crucial for optimal performance of the TPS560430XFDBVT. Designers should pay special attention to the placement of input capacitors, output capacitors, and the inductor to minimize loop areas and reduce EMI. Thermal vias may be necessary for heat dissipation in high ambient temperature applications. When handling the device, standard ESD precautions for semiconductor components should be observed. The exposed thermal pad must be properly soldered to the PCB for effective heat transfer. Input voltage transients should be kept within the absolute maximum ratings to prevent damage to the IC.

B2B Procurement Guide

When procuring TPS560430XFDBVT in volume, buyers should verify the manufacturer's lead time and available package options. Texas Instruments typically offers this part through authorized distributors with various packaging options (tape and reel, cut tape, or bulk). For high-reliability applications, request documentation such as qualification reports or automotive-grade certifications if needed. Consider second-source alternatives or pin-compatible devices from other manufacturers to mitigate supply chain risks. Volume pricing typically becomes competitive at order quantities above 1,000 units.