Analog Devices Inc./Maxim Integrated MAX77540EVKIT#

Overview

MAX77540EVKIT# from Maxim Integrated is a fully assembled and tested evaluation kit for the MAX77540 dual-phase configurable step-down regulator in WLP package. It supports input voltage from 4.0V to 16.0V, delivers up to 3A per phase (6A total in dual-phase mode), and features default VOUT1 = 3.3V, VOUT2 = 5.0V, and fSW = 1.0MHz - enabling rapid validation of high-efficiency power delivery in compact portable electronics.

For engineers reviewing the MAX77540EVKIT# datasheet, MAX77540EVKIT# pinout, MAX77540EVKIT# application, or MAX77540EVKIT# equivalent, this board provides hands-on I²C register control, SEL-pin configuration flexibility, probe-socket–enabled precision measurement at VOUTx/LXx nodes, and full GUI-driven evaluation of dynamic voltage scaling, soft-start/stop ramp rates, and current-limit behavior under real load conditions.

Technical Context

The MAX77540EVKIT# implements the MAX77540AAWV+T IC in its recommended PCB layout with dedicated test points, jumper-selectable operating modes (dual-phase vs. 1+1), and potentiometer-adjustable SEL1/SEL2 pins. It integrates onboard 2.2kΩ I²C pull-ups (R4, R7), 100Ω active discharge, and configurable FPWM/PSM operation via FPWM1B/FPWM2B jumpers.

Default configuration includes 3.3V/5.0V outputs, 5.0mV/µs soft-start ramp, –0.15mV/µs soft-stop ramp, and 4.5A current limit. The board accepts external I²C hosts via J16 or uses the included MAXUSB_INTERFACE# (connected to J11) for Windows-based GUI control with real-time register read/write access.

Key Specifications

Availability

MAX77540EVKIT# is available at Aetrix Electronics and suitable for power architecture validation, DC-DC efficiency benchmarking, and embedded system bring-up requiring stable component supply, traceable sourcing, and long-term design-in support.

Supply support for MAX77540EVKIT# 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

Maxim Integrated (now part of Analog Devices) designs high-performance analog and mixed-signal semiconductor solutions for power management, sensing, and interface applications.

The MAX77540 product line targets space-constrained portable electronics requiring high-efficiency, multi-output, and dynamically reconfigurable power delivery - especially smartphones, wearables, and IoT edge devices.

FAQ

What is the primary function of the MAX77540EVKIT#?

The MAX77540EVKIT# is a fully assembled evaluation platform for the MAX77540 dual-phase step-down regulator. It enables engineers to validate power delivery performance, configure output voltages via SEL pins or I²C, measure switching waveforms using integrated probe sockets, and exercise all device registers through the Windows GUI. The MAX77540EVKIT# directly supports design decisions for compact, high-current DC-DC applications.

Does the MAX77540EVKIT# include the MAX77540 IC?

Yes, the MAX77540EVKIT# includes one MAX77540AAWV+T IC installed in WLP30 package (U1 on the board). This is the exact production-grade device being evaluated - not a placeholder or sample variant - and operates under the same electrical and thermal specifications as the final application design.

How do I configure dual-phase vs. 1+1 operation on the MAX77540EVKIT#?

Dual-phase operation is enabled by setting jumper J5 to position 3–4 (shorting SEL2 to GND) and installing resistor R12. For 1+1 single-phase operation, set J5 to position 2–4 or 4–6 and remove R12. Table 3 in the EV kit documentation confirms this mapping, and the silk screen near J5 provides visual reference for correct shunt placement on the MAX77540EVKIT#.

Can I use my own I²C host instead of the MAXUSB_INTERFACE# with the MAX77540EVKIT#?

Yes - the MAX77540EVKIT# provides an external I²C header (J16) with SCL, SDA, VIO, and GND connections. Disconnect the MAXUSB_INTERFACE# from J11, wire your custom host to J16, and ensure proper pull-up resistors and VIO level (1.8V) are applied. The MAX77540EVKIT# retains full register accessibility and functional behavior regardless of I²C source.

What accessories are required to operate the MAX77540EVKIT# out of the box?

To operate the MAX77540EVKIT# immediately, you need: (1) a 4.0–16.0V DC power supply connected to SYS/PGND3 terminals; (2) a USB Type-A to micro-USB cable; (3) a Windows PC (Windows 7 or newer); and (4) the free GUI software downloaded from Maxim's MAX77540EVKIT# product page. The MAXUSB_INTERFACE# is included in the kit and connects to J11 for I²C communication.