Texas Instruments LMR50410EVM

Overview

LMR50410EVM from Texas Instruments is an evaluation module designed to validate the operation and performance of the PLMR50410 synchronous buck regulator. It supports 4-V to 36-V input, delivers up to 1-A at default 5-V output, operates at 700-kHz switching frequency, features hiccup-mode short-circuit protection, and uses internal compensation for simplified design. It is used in power supply validation for industrial and embedded DC/DC conversion stages.

For engineers reviewing the LMR50410EVM datasheet, LMR50410EVM setup, LMR50410EVM board layout, or LMR50410EVM schematic, this page provides verified hardware configuration details, jumper-controlled output selection (3.3 V / 5 V), test point access for loop response measurement, and full BOM traceability for rapid prototyping and design verification.

Technical Context

The LMR50410EVM implements a single-channel non-isolated synchronous buck converter based on the PLMR50410 IC in SOT23-6 package. It integrates all necessary passive components-including 10-µH shielded inductor (Wurth 74437334100), input/output ceramic capacitors (4.7 µF, 10 µF, 0.1 µF), and precision feedback resistors-to enable immediate functional evaluation without external component selection.

Output voltage is selected via JP1 jumper (3.3 V or 5 V); alternative outputs require resistor reconfiguration using the formula VOUT = 1.0 V × (1 + R3/R5). Test points TP7–TP9 support AC loop analysis, confirming stability under real load conditions across the 4–36 V input range.

Key Specifications

Availability

LMR50410EVM is available at Aetrix Electronics and suitable for industrial power validation, embedded DC/DC reference design, and automotive subsystem prototyping requiring stable component supply and full documentation traceability.

Supply support for LMR50410EVM 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, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The LMR50410EVM belongs to TI's Power Management EVM portfolio, developed specifically to accelerate adoption of their wide-input buck regulators by providing fully assembled, tested, and documented hardware platforms with production-grade layout and thermal design.

FAQ

What is the primary function of the LMR50410EVM?

The LMR50410EVM is an evaluation module that enables functional and performance validation of the PLMR50410 synchronous buck regulator. It provides a ready-to-use platform with pre-populated components, jumper-selectable output voltages (3.3 V or 5 V), and dedicated test points for loop analysis-allowing engineers to verify regulation accuracy, transient response, and thermal behavior before committing to custom PCB design. The LMR50410EVM itself contains no active IC beyond the PLMR50410 device.

How do I change the output voltage of the LMR50410EVM from 5 V to 3.3 V?

Use jumper JP1 to select between 5 V and 3.3 V output configurations on the LMR50410EVM. When JP1 is installed in the "5V" position, the feedback network sets VOUT = 5 V; when moved to the "3.3V" position, it configures R3 and R5 to yield 3.3 V. No soldering or resistor replacement is required-the LMR50410EVM supports both outputs via this hardware-selectable method per its User's Guide (SLUUC69).

Which test points on the LMR50410EVM are used for loop response measurement?

The LMR50410EVM provides three dedicated test points-TP7, TP8, and TP9-for performing AC loop response measurements as specified in the User's Guide. These points allow injection and monitoring of control-loop signals to assess phase margin and gain crossover, verifying stability under varying load and line conditions. Their placement follows TI's recommended layout practices for accurate small-signal analysis of the PLMR50410-based converter.

Does the LMR50410EVM include the PLMR50410 IC?

Yes, the LMR50410EVM includes one PLMR50410 synchronous buck regulator IC mounted in SOT23-6 package (designator U1). This is confirmed in Table 1 and the Bill of Materials (Section 5) of the LMR50410EVM User's Guide (SLUUC69). The PLMR50410 is the core active component enabling the EVM's 4–36 V input to regulated output conversion, and its presence is essential to the LMR50410EVM's functionality.

What are the physical dimensions and PCB construction of the LMR50410EVM?

The LMR50410EVM is a 2-layer printed circuit board measuring 57 mm × 79 mm, with 1-oz copper planes on both layers. This construction supports thermal dissipation for 1-A operation and maintains signal integrity for high-frequency switching (700 kHz). Board layout files-including top and bottom layer diagrams-are provided in the official documentation (SLUUC69), enabling replication or modification for custom designs.