Texas Instruments LMZM33603EVM

Overview

LMZM33603EVM from Texas Instruments is an evaluation module designed to facilitate comprehensive performance and feature evaluation of the LMZM33603 synchronous buck power module. It supports 4–36 V input, delivers up to 3 A output current, and enables configurable output voltages (2.5 V, 3.3 V, 5.0 V, 12 V) and switching frequencies (250 kHz to 900 kHz) via jumpers-used for power-conversion validation in industrial and embedded power supply designs.

For engineers reviewing the LMZM33603EVM datasheet, LMZM33603EVM pinout, LMZM33603EVM application, or LMZM33603EVM equivalent, this EVM provides accessible test points for efficiency, ripple, transient response, line/load regulation, and control signal verification-including EN, PGOOD, UVLO, and SYNC functionality-enabling rapid prototyping and design-in validation of high-density DC/DC solutions.

Technical Context

The LMZM33603EVM implements the LMZM33603 power module in a fully assembled, thermally optimized PCB layout with integrated input/output capacitors, jumper-selectable feedback network, and frequency-setting resistors. It features dedicated scope test points (VIN Scope/J3, VOUT Scope/J4) with low-inductance ground paths and wire-loop DVM monitoring points (VIN S+/S−, VOUT S+/S−) for accurate efficiency and regulation measurements.

Control interface access includes EN (100 kΩ pull-up to VIN), PGOOD (open-drain with 5.1-V zener clamp), SYNC (AC-coupled via 1000 pF capacitor and terminated with 49.9 Ω to PGND), and UVLO adjustment capability via external resistor dividers (R9/R16). The board supports full 3-A output current across all configured voltage/frequency combinations without derating.

Key Specifications

Availability

LMZM33603EVM is available at Aetrix Electronics and suitable for industrial power supply validation, embedded system DC/DC design-in, and automotive subsystem bench testing requiring stable component supply and documented reference performance.

Supply support for LMZM33603EVM 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 ICs and reference design ecosystems.

The LMZM33603EVM belongs to TI's modular power module evaluation platform family, engineered to accelerate adoption of integrated DC/DC solutions by providing production-ready layouts, validated thermal performance, and complete signal accessibility for real-world power design verification.

FAQ

What is the primary function of the LMZM33603EVM?

The LMZM33603EVM is an evaluation module that enables engineers to validate the electrical performance, thermal behavior, and control functionality of the LMZM33603 synchronous buck power module. It provides full access to key signals-including EN, PGOOD, SYNC, and UVLO-and supports configurable output voltage and switching frequency settings for rapid design iteration and compliance testing before final PCB integration.

Does the LMZM33603EVM support both LMZM33602 and LMZM33603 devices?

No-the LMZM33603EVM is specifically populated with the LMZM33603RLR power module (as confirmed in Table 3 of the BOM), while the LMZM33602EVM variant uses the LMZM33602RLR. Though mechanically identical and sharing the same PCB layout and jumper configuration, each EVM is designated for its respective device; the LMZM33603EVM is not intended for use with the LMZM33602 device.

How do I configure the output voltage on the LMZM33603EVM?

Output voltage on the LMZM33603EVM is set using the VOUT SELECT jumper (J6), which connects internal resistor divider and feedforward capacitor networks. Four factory-configured options are supported: 2.5 V (250 kHz), 3.3 V (300 kHz), 5.0 V (450 kHz), and 12 V (900 kHz). Jumper position must be verified and power removed before changing settings, as specified in Table 1 of the user's guide.

Can the LMZM33603EVM be synchronized to an external clock?

Yes-the LMZM33603EVM provides a dedicated SYNC test point (labeled "SYNC") with AC coupling (1000 pF capacitor C17) and 49.9 Ω termination to PGND (R17), matching the LMZM33603 device's synchronization interface requirements. An external clock signal applied here allows precise timing alignment with system clocks or other converters, supporting noise-sensitive or multi-rail applications where phase control is critical.

What thermal and layout features does the LMZM33603EVM incorporate?

The LMZM33603EVM uses TI's recommended PCB layout with enhanced copper pour, optimized thermal vias, and strategic component placement to maximize heat dissipation from the LMZM33603 module. Its design minimizes output voltage ripple and switching noise through controlled impedance routing, separate AGND/PGND planes, and low-inductance test point connections-ensuring measurement integrity and representative thermal performance under full 3-A load conditions.