Analog Devices Inc. EVAL-LTM4702-AZ

Overview

EVAL-LTM4702-AZ from Analog Devices is an evaluation board for the LTM4702 8A ultralow-noise Silent Switcher 3 µModule regulator. It implements a complete 1V/8A step-down power solution with 8 μV_RMS (10 Hz–100 kHz) output noise, 3–16 V input range, and programmable 300 kHz–3 MHz switching frequency - optimized for RF power supplies and high-precision data converters.

For engineers reviewing the EVAL-LTM4702-AZ datasheet, EVAL-LTM4702-AZ pinout, EVAL-LTM4702-AZ application, or EVAL-LTM4702-AZ equivalent, this board enables rapid validation of LTM4702 performance in low-EMI, low-noise DC/DC applications - including transient response, multiphase parallel operation, and fast start-up behavior under real load conditions.

Technical Context

The EVAL-LTM4702-AZ implements the full LTM4702 reference design with dual-sided PCB layout (<0.5 cm² footprint), pre-populated 49-ball BGA module, and all recommended external components: 10 μF X7R input capacitors, dual 100 μF ×2 X7R output capacitors, 10 kΩ R_SET, and 137 kΩ RT resistor for 800 kHz operation at 1 V output.

It supports all LTM4702 operating modes - pulse-skipping, forced continuous mode (FCM), and external synchronization - via accessible SYNC, PHMODE, and RUN jumpers; includes Kelvin-sense VOSNS routing, PGSET programmability, and thermal monitoring via TSENSE+/- test points for accurate junction temperature correlation.

Key Specifications

Availability

EVAL-LTM4702-AZ is available at Aetrix Electronics and suitable for RF power supply validation, high-speed ADC/DAC biasing, and low-noise instrumentation prototyping requiring stable component supply and traceable evaluation hardware.

Supply support for EVAL-LTM4702-AZ 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

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision, power, and RF markets since 1965.

The EVAL-LTM4702-AZ belongs to Analog Devices' µModule regulator evaluation platform family, designed to accelerate adoption of integrated power solutions in noise-sensitive, space-constrained applications such as telecom infrastructure and test equipment.

FAQ

What is the primary purpose of the EVAL-LTM4702-AZ?

The EVAL-LTM4702-AZ is a fully assembled evaluation board for the LTM4702 8A Silent Switcher 3 µModule regulator. It enables engineers to validate key performance metrics - including ultralow RMS noise (8 μV_RMS), EMI emissions, transient response, and multiphase parallel operation - without designing a custom PCB. The board ships with all recommended components populated per the LTM4702 datasheet's typical application.

Does the EVAL-LTM4702-AZ support adjustable output voltage?

Yes - the EVAL-LTM4702-AZ supports output voltage adjustment from 0.3 V to 5.7 V via replacement of the onboard R_SET resistor. The default configuration uses a 10 kΩ resistor for 1 V output. The board includes test points for VOSNS and SET to enable Kelvin sensing and precise regulation verification across the full LTM4702 output range.

Can the EVAL-LTM4702-AZ demonstrate multiphase operation?

Yes - the EVAL-LTM4702-AZ provides access to COMPa, CLKOUT, and PHMODE pins, enabling direct connection to a second EVAL-LTM4702-AZ (or compatible LTM4702-based board) for out-of-phase, current-sharing multiphase operation. The board's layout preserves signal integrity on these critical control lines and includes dedicated test points for phase alignment verification.

How is thermal performance validated on the EVAL-LTM4702-AZ?

The EVAL-LTM4702-AZ includes TSENSE+ and TSENSE− test points connected to the LTM4702's internal diode temperature sensor, allowing direct measurement of junction temperature using a DMM or thermal monitor. Derating curves from the LTM4702 datasheet (e.g., 12 V_IN/1 V_OUT) are applicable, and the board's dual-sided copper pour and thermal vias support repeatable thermal testing up to 8 A continuous load.

Is the EVAL-LTM4702-AZ RoHS-compliant and lead-free?

Yes - the EVAL-LTM4702-AZ uses RoHS-compliant materials and SAC305 (SnAgCu) solder throughout. The LTM4702 module itself is supplied in the RoHS-compliant LTM4702EY#PBF variant (e1 MSL rating), and all passive components meet IPC-J-STD-609 Class 1 finish requirements. Full compliance documentation is available upon request.