Texas Instruments LMR36520AEVM

Overview

The LMR36520AEVM from Texas Instruments is an evaluation module designed to validate the operation and performance of the LMR36520ADDAR synchronous buck regulator, supporting 4.2 V–65 V input, 3.3 V or 5 V selectable output, 400 kHz switching frequency, and up to 2 A load current in industrial and automotive power supply development.

For engineers reviewing the LMR36520AEVM datasheet, LMR36520AEVM board layout, LMR36520AEVM test point functions, or LMR36520AEVM jumper configuration, this EVM provides direct access to VINEMI, VOUT, EN, PGOOD, VOS, VIS, GNDS, and SW nodes-enabling rapid characterization of transient response, efficiency, and loop stability under real-world load and input conditions.

Technical Context

The LMR36520AEVM implements the LMR36520ADDAR (HSOIC-8) DC/DC controller in a fully assembled, tested layout with dual-output-voltage selection (3.3 V/5 V), integrated EMI filtering on VINEMI, and dedicated analog sense points (VOS, VIS, GNDS) for precision measurement.

It supports external enable control via EN test point, power-good monitoring at PGOOD (pulled to ~5 V VCC), and frequency response analysis using onboard injection node (A) and sense node (B), all aligned with TI's SIMPLE SWITCHER® design methodology for robust 65 V-input buck conversion.

Key Specifications

Availability

LMR36520AEVM is available at Aetrix Electronics and suitable for industrial power supply validation, automotive ADAS subsystem testing, and high-voltage DC/DC reference design prototyping requiring stable component supply and full evaluation flexibility.

Supply support for LMR36520AEVM 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 delivering analog and embedded processing solutions, with leadership in power management ICs, precision analog, and educational tools since 1930.

The LMR36520AEVM belongs to TI's SIMPLE SWITCHER® evaluation module family, engineered to accelerate adoption of high-input-voltage buck regulators in harsh-environment applications where reliability, layout reproducibility, and measurement fidelity are critical.

FAQ

What is the primary function of the LMR36520AEVM?

The LMR36520AEVM is a hardware evaluation platform for the LMR36520ADDAR synchronous buck converter. It enables engineers to verify startup behavior, efficiency, thermal performance, transient response, and loop stability without designing a custom PCB. The LMR36520AEVM includes all necessary passives, EMI filtering, and test interfaces to characterize the LMR36520ADDAR under real operating conditions across its full 4.2 V–65 V input range.

Which device does the LMR36520AEVM evaluate?

The LMR36520AEVM evaluates the LMR36520ADDAR - a 4.2 V–65 V, 2 A synchronous step-down DC/DC converter in an HSOIC-8 package. This specific EVM variant uses the LMR36520ADDAR silicon and matches its electrical specifications, including 400 kHz switching frequency, 3.3 V/5 V selectable output, and integrated high-side/low-side MOSFETs. The LMR36520AEVM does not evaluate other members of the LMR365xx family unless explicitly substituted per TI documentation.

How do I configure the output voltage on the LMR36520AEVM?

Output voltage on the LMR36520AEVM is configured using the VOUT jumper: position "3.3 V" sets the feedback divider for 3.3 V output, and "5 V" configures it for 5 V. These settings use factory-installed resistors RFBT1 (46.4 kΩ) and RFBT2 (34.0 kΩ). To set other voltages, replace RFBB (R4) per the LMR36520ADDAR datasheet's V_OUT equation - the LMR36520AEVM provides solder pads and layout space to support such modifications without redesign.

Can the LMR36520AEVM be used for frequency response analysis?

Yes, the LMR36520AEVM supports frequency response analysis (FRA) via dedicated nodes: injection point "A" (on bottom layer) and sense point "B" (VOS test point). These are routed with controlled impedance and low-noise grounding to minimize measurement error. The LMR36520AEVM User's Guide (SNVU677) provides exact FRA setup instructions, including network analyzer connection diagrams and recommended injection amplitude - enabling accurate gain/phase margin assessment of the LMR36520ADDAR's control loop.

What are the key test points and their roles on the LMR36520AEVM?

The LMR36520AEVM provides ten labeled test points: EN (external enable control), VCC (~5 V internal supply), PGOOD (open-drain power-good flag pulled to VCC), SW (switch node for waveform capture), VOS (output voltage sense), VIS (input voltage sense), GNDS (isolated analog ground sense), and three GND points. Each serves a defined measurement or control role - for example, GNDS and VOS enable differential voltage measurements free of PCB IR drop, while SW allows direct observation of switching node ringing and duty cycle. All test points are plated-through and rated for probe contact.