Texas Instruments LM5168PEVM

Overview

LM5168PEVM from Texas Instruments is a high-voltage DC/DC buck evaluation module built around the LM5168P synchronous buck converter IC, delivering a regulated 12-V output at up to 0.3 A across a 20–115-V input range, with 500-kHz switching frequency, ±1.5% output set-point accuracy, and COT control architecture with type III ripple injection for stable regulation.

For engineers reviewing the LM5168PEVM datasheet, LM5168PEVM pinout, LM5168PEVM application, or LM5168PEVM equivalent, this EVM supports rapid prototyping of industrial power supplies, high-input-voltage IoT gateways, and isolated Fly-Buck auxiliary rails - with verified thermal performance via 4-layer PCB and PowerPAD™-optimized layout.

Technical Context

The LM5168PEVM implements a constant-on-time (COT) control scheme with input voltage feed-forward, enabling fast transient response and stable operation without external compensation. It uses type III ripple injection at the FB node to ensure sufficient AC signal for regulation while minimizing output voltage ripple.

It integrates the LM5168P IC in an 8-pin SO PowerPAD™ package, featuring internal high-side and low-side MOSFETs, precision enable/UVLO (6.0 V turn-on, 5.6 V turn-off), and advanced over-current protection. The board supports optional EMI filtering (L2/C18 unpopulated by default) and configurable EN/UVLO jumpers for startup behavior.

Key Specifications

Availability

LM5168PEVM is available at Aetrix Electronics and suitable for industrial power supply validation, high-voltage IoT gateway development, and Fly-Buck auxiliary rail design requiring stable component supply, traceable sourcing, and long-term evaluation platform continuity.

Supply support for LM5168PEVM 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 headquartered in Dallas, Texas, specializing in analog, embedded processing, and high-reliability power management solutions for industrial, automotive, and communications markets.

The LM5168PEVM belongs to TI's High-Voltage Buck Evaluation Module family, designed specifically to accelerate development of robust, compact DC/DC converters for applications operating directly from unregulated industrial or telecom power buses.

FAQ

What is the primary function of the LM5168PEVM?

The LM5168PEVM is an evaluation module that demonstrates the LM5168P synchronous buck converter IC. It provides a ready-to-use, fully assembled and tested platform to validate 12-V/0.3-A power delivery from 20–115-V inputs. Engineers use the LM5168PEVM to verify performance metrics like efficiency, transient response, and thermal behavior before integrating the LM5168P into custom designs.

Does the LM5168PEVM support adjustable output voltage?

No - the LM5168PEVM is configured as a fixed 12-V output using an external resistor divider network per the LM5168P datasheet. While the underlying LM5168P IC supports adjustable outputs via feedback resistors, the LM5168PEVM board is pre-configured and not intended for output voltage reconfiguration without hardware modification.

Can the LM5168PEVM be used for Fly-Buck topology evaluation?

Yes - the LM5168PEVM is based on the LM5168P, which is explicitly specified in TI documentation as supporting Fly-Buck capability. Though the base LM5168PEVM board implements only the primary buck stage, its schematic and layout accommodate secondary winding integration, and TI's reference designs confirm the LM5168P's validated Fly-Buck operation - making the LM5168PEVM a suitable starting point for such topologies.

What safety precautions apply when operating the LM5168PEVM?

The LM5168PEVM is classified as a Texas Instruments High-Voltage EVM and requires strict adherence to safety guidelines: it must be operated only by qualified professionals in lab environments, with de-energized connections during probing, use of isolated test equipment, physical barriers, and emergency power-off infrastructure. Input voltages above 50 V RMS/75 V DC demand insulated tools, protective gear, and observer presence - per TI's SNVU826 User's Guide.

Is EMI filtering implemented on the LM5168PEVM by default?

No - the LM5168PEVM includes provision for an input EMI filter (L2 and C18 footprints), but these components are unpopulated in the standard configuration. To activate the filter, users must solder L2 (15 µH shielded inductor) and C18 (4.7 µF/100-V X7S capacitor); maximum rated input voltage for the filter is 100 VDC, limiting its use to ≤100-V input conditions.