Texas Instruments LM62440EVM-PP-2MHZ

Overview

LM62440EVM-PP-2MHZ from Texas Instruments is an evaluation module designed to validate the LM62440-Q1 4-A synchronous step-down DC/DC converter operating at a factory-programmed 2-MHz switching frequency. It implements the VQFN-HR-14 package variant, delivers up to 4 A output with 5-V regulation from 3–36-V input, and features integrated EMI-optimized layout, thermal management, and test points for EN, PGOOD, VIN/VOUT sensing, and bode plot injection.

For engineers reviewing the LM62440EVM-PP-2MHZ datasheet, LM62440EVM-PP-2MHZ pinout, LM62440EVM-PP-2MHZ application, or LM62440EVM-PP-2MHZ equivalent, this EVM supports rapid characterization of efficiency, load/transient response, conducted EMI performance, thermal behavior, and loop stability in automotive-grade buck converter designs.

Technical Context

The LM62440EVM-PP-2MHZ implements the LM62440-Q1 IC in a fixed 2-MHz configuration with external synchronization capability via the MODE/SYNC pin. It includes dual input paths (VIN and VIN_EMI with onboard LC filter), Kelvin-sensed VIN/VOUT test points (VINS/VOUTS), and a dedicated bode plot injection node (Vinj) tied to the feedback divider.

Board-level features include wettable flank VQFN-HR-14 footprint replication, 4.1×4.1-mm shielded power inductors (L1 = 1.5 µH, L2 = 1 µH), AEC-Q200–rated ceramic capacitors, and configurable jumpers for FPWM/auto mode, spread spectrum, and bias sourcing - all aligned with TI's automotive-grade design guidelines.

Key Specifications

Availability

LM62440EVM-PP-2MHZ is available at Aetrix Electronics and suitable for automotive ADAS power validation, infotainment system DC/DC prototyping, and industrial control subsystem evaluation requiring stable component supply and production-representative layout practices.

Supply support for LM62440EVM-PP-2MHZ 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 and evaluation platforms for automotive, industrial, and personal electronics.

The LM62440-Q1 product line targets automotive power conversion applications demanding high efficiency, low EMI, and AEC-Q100 qualification - the LM62440EVM-PP-2MHZ serves as its reference implementation for 2-MHz operation.

FAQ

What is the primary function of the LM62440EVM-PP-2MHZ?

The LM62440EVM-PP-2MHZ is an evaluation module built around the LM62440-Q1 4-A synchronous buck converter. Its purpose is to enable engineers to characterize efficiency, thermal performance, EMI behavior, transient response, and loop stability under real-world conditions - specifically at the factory-set 2-MHz switching frequency. The board includes full test point access, input filtering options, and automotive-grade passive components to replicate production design constraints.

Does the LM62440EVM-PP-2MHZ support external clock synchronization?

Yes, the LM62440EVM-PP-2MHZ supports external clock synchronization via the CLK connector, which routes directly to the MODE/SYNC pin of the LM62440-Q1. When an external clock signal ≥3.3 Vpp is applied, the device enters forced PWM mode, disables spread spectrum, and locks its switching frequency to the external source - enabling precise timing alignment in multi-rail systems without modifying the board's default 2-MHz configuration.

How is output voltage set on the LM62440EVM-PP-2MHZ?

The LM62440EVM-PP-2MHZ delivers a fixed 5-V output determined by the onboard feedback resistor divider (RFBT and RFBB). This configuration matches the standard LM62440-Q1 5-V variant and eliminates the need for external programming. The FB pin is accessible via test point TP7, allowing users to modify the divider or inject signals for bode plot analysis using the dedicated Vinj node.

What input filtering options does the LM62440EVM-PP-2MHZ provide?

The LM62440EVM-PP-2MHZ offers two independent input paths: a direct VIN-to-GND connection and a filtered VIN_EMI-to-GND_EMI path incorporating CF1–CF4 and LF1. This LC filter reduces conducted EMI at the source and is intended for compliance testing. Users can select either path via wiring - the unfiltered path suits basic functional validation, while the filtered path supports pre-compliance EMI measurements per CISPR standards.

Can the LM62440EVM-PP-2MHZ be used for thermal performance validation?

Yes, the LM62440EVM-PP-2MHZ is explicitly optimized for thermal measurement and validation. Thermal imaging data (Figure 4 in the user's guide) confirms operation at 13.5 V_IN, 5 V_OUT, and 4 A load, with temperature distribution captured across the LM62440-Q1 VQFN-HR-14 package and power inductors. The board's copper pour, thermal vias, and component placement follow TI's automotive thermal guidelines - making it suitable for correlating junction temperature rise with system-level cooling requirements.