Texas Instruments TPS54328EVM-686

Overview

TPS54328EVM-686 from Texas Instruments is an evaluation module for the TPS54328 synchronous buck converter IC, configured to deliver 1.05 V at up to 3 A from a 4.5–18 V input. It implements D-CAP2™ control mode, operates at ~675 kHz, supports Eco-mode™ for light-load efficiency, and features measured output voltage ripple of 15 mV_PP at full load.

For engineers reviewing the TPS54328EVM-686 datasheet, TPS54328EVM-686 test setup, TPS54328EVM-686 efficiency curves, or TPS54328EVM-686 schematic and BOM, this module provides validated performance data-including line/load regulation, transient response, start-up timing, and ripple under Eco-mode™-to accelerate power stage validation for industrial and embedded DC/DC designs.

Technical Context

The TPS54328EVM-686 integrates the TPS54328DDA SOIC-8 IC with a 1.5 µH shielded inductor (SPM6530T-1R5M100), input/output ceramic capacitors (C9/C10 = 22 µF each), and precision feedback resistors (R1 = 8.25 kΩ, R2 = 22.1 kΩ) to fix the output at 1.05 V. Its layout separates analog ground (AGND) and power ground (PGND) with single-point connection near C6.

D-CAP2™ control enables fast transient response without external compensation by sensing output ripple across low-ESR ceramic capacitors. Eco-mode™ automatically engages below ~30 mA load, reducing switching frequency to improve light-load efficiency while maintaining regulation-verified via Figures 4-2 and 4-8 in the User's Guide.

Key Specifications

Availability

TPS54328EVM-686 is available at Aetrix Electronics and suitable for power supply validation, DC/DC reference design verification, and embedded system bring-up requiring stable component supply and documented test data.

Supply support for TPS54328EVM-686 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and power management technologies, with decades of leadership in power conversion solutions.

The TPS54328EVM-686 belongs to TI's evaluation module product line, designed specifically to demonstrate and validate the performance of the TPS54328 synchronous buck converter in real-world applications such as FPGA core supplies and industrial microcontroller power rails.

FAQ

What is the primary function of the TPS54328EVM-686?

The TPS54328EVM-686 is an evaluation module that demonstrates the operation and performance of the TPS54328 synchronous buck converter IC. It delivers a fixed 1.05 V output at up to 3 A from a 4.5–18 V input, enabling engineers to verify efficiency, transient response, ripple, and regulation before integrating the TPS54328 into their own designs. The TPS54328EVM-686 includes complete schematics, BOM, and test data per SLVU422A.

Can the output voltage of the TPS54328EVM-686 be adjusted?

Yes-the TPS54328EVM-686 output voltage is set by resistor divider R1/R2 and can be modified by replacing R1. Table 3-1 in the User's Guide lists R1 values for common outputs from 1.0 V to 6.5 V. For example, changing R1 from 8.25 kΩ to 12.7 kΩ configures the TPS54328EVM-686 for 1.2 V. Feedforward capacitor C4 may be added for stability above 1.8 V.

What are the key test points on the TPS54328EVM-686 board?

The TPS54328EVM-686 provides dedicated test points: TP1/TP2 for input voltage and ground, TP8/TP9 for output voltage and ground, TP3 for enable signal, TP4 for loop response measurement, TP5 for VREG5, TP6 for switch node, and TP7 for analog ground. These allow direct probing of critical signals during characterization without soldering or modification.

How does Eco-mode™ operate on the TPS54328EVM-686?

Eco-mode™ on the TPS54328EVM-686 automatically reduces switching frequency under light loads (~30 mA or less) to minimize quiescent current and boost efficiency-demonstrated in Figure 4-2 (light-load efficiency) and Figure 4-8 (Eco-mode™ ripple). This behavior is inherent to the TPS54328 IC and requires no external configuration; the TPS54328EVM-686 validates its real-world implementation.

Is the TPS54328EVM-686 compatible with other TPS543xx evaluation modules?

No-the TPS54328EVM-686 is specifically designed for the TPS54328DDA IC and uses a unique bill of materials, layout, and component selection (e.g., 1.5 µH inductor, 22 µF output caps, 8.25 kΩ R1). While other TPS543xx EVMs share similar architecture, differences in IC pinout, current rating, and control scheme prevent direct interchangeability. Each module must be evaluated independently using its designated User's Guide.