Analog Devices Inc./Maxim Integrated MAX1709EVKIT

Overview

MAX1709EVKIT from Maxim Integrated is an evaluation kit for the MAX1709 4A, low-noise, high-frequency step-up DC-DC converter IC. It supports fixed 3.3V/5V or adjustable 2.5V–5.5V output, operates from 0.7V–5V input, delivers up to 20W, and features 600kHz fixed-frequency PWM with external clock synchronization (350–1000kHz). It enables rapid validation of high-power boost conversion in battery-powered routers, RF power amplifiers, and local voltage translation circuits.

For engineers reviewing the MAX1709EVKIT datasheet, MAX1709EVKIT pinout, MAX1709EVKIT application, or MAX1709EVKIT equivalent, this kit provides a fully assembled, tested reference design with documented layout, component bill-of-materials, and performance characterization data-including efficiency curves, transient response, startup behavior, and noise spectra-specifically aligned to the MAX1709EUI+ TSSOP-EP variant.

Technical Context

The MAX1709EVKIT implements the MAX1709EUI+ IC in its 28-pin TSSOP-EP package, featuring an integrated 10ARMS n-channel MOSFET switch, programmable soft-start via SS/LIM pin, and dual-mode output control (fixed 3.3V/5V or adjustable via FB resistor divider). It supports momentary pushbutton on/off sequencing using ONA/ONB logic inputs with 0.15V hysteresis.

It validates key system-level behaviors: constant-frequency 600kHz switching (reducing post-filtering burden), external clock synchronization capability, <1mW quiescent current in shutdown, and thermal management via exposed pad grounding. The board includes all critical passive components-1µH shielded inductor, Schottky diode (MBRD1035CTL), input/output bulk capacitors (150µF polymer ×2), and precision feedback network-as specified in the MAX1709 datasheet Figure 1.

Key Specifications

Availability

MAX1709EVKIT is available at Aetrix Electronics and suitable for router power subsystem validation, RF PA bias supply prototyping, and 2.5V-to-5V local conversion development requiring stable component supply and full design support documentation.

Supply support for MAX1709EVKIT 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.

The MAX1709EVKIT belongs to Maxim's high-efficiency DC-DC evaluation platform family, designed to accelerate adoption of their integrated step-up converters in space-constrained, noise-sensitive, and battery-operated systems.

FAQ

What is the primary function of the MAX1709EVKIT?

The MAX1709EVKIT is a fully assembled evaluation kit for the MAX1709 step-up DC-DC converter IC. It provides a working reference design to validate performance-including efficiency, transient response, startup behavior, and EMI characteristics-of the MAX1709EUI+ in real-world applications such as RF power amplifier biasing and local voltage boosting. The MAX1709EVKIT includes all necessary passives, layout guidance, and test points per the official MAX1709 datasheet.

Which MAX1709 variant does the MAX1709EVKIT support?

The MAX1709EVKIT is specifically configured for the MAX1709EUI+ variant: the 28-pin TSSOP-EP package with exposed thermal pad, rated for 10ARMS switch current and 4A continuous output. It is not compatible with the 16-pin narrow SO (MAX1709ESE) variant due to differing pinout, thermal design, and current capability. The MAX1709EVKIT's layout, component selection, and thermal vias are optimized for the MAX1709EUI+'s exposed-pad construction.

Does the MAX1709EVKIT include synchronization capability verification?

Yes, the MAX1709EVKIT supports external clock synchronization as specified in the MAX1709 datasheet. The CLK pin is accessible via test point or header, allowing connection to an external 350–1000kHz clock source to verify synchronized switching operation, harmonic suppression, and noise spectrum control. This functionality is validated in the MAX1709EVKIT user guide with oscilloscope waveforms and spectral analysis examples.

Can the MAX1709EVKIT be used to evaluate adjustable output voltages?

Yes, the MAX1709EVKIT supports both fixed-output (3.3V/5V) and adjustable-output (2.5V–5.5V) configurations. The board includes solder jumpers or pads to disconnect the internal FB-to-GND path and route an external resistor divider to the FB pin, enabling precise output voltage tuning per the MAX1709's Dual-Mode™ architecture. All required compensation and layout guidelines for adjustable mode are provided in the MAX1709EVKIT documentation.

Is thermal performance data included with the MAX1709EVKIT?

Yes, the MAX1709EVKIT documentation includes measured thermal performance under load, including junction temperature rise versus output current and ambient temperature, validated using the MAX1709EUI+'s exposed pad thermally connected to a 1in² copper area with multiple vias. Data confirms operation within safe limits up to 4A at 5V output with 3.3V input, consistent with the MAX1709's 1.2°C/W junction-to-pad thermal resistance specification.