Analog Devices Inc./Maxim Integrated MAX1724EVKIT

Overview

MAX1724EVKIT from Maxim Integrated is a fully assembled and tested evaluation kit containing two independent boost switching-regulator circuits: a left-side MAX1724-based 3.3V fixed-output stage and a right-side MAX1722-based adjustable 3.6V output stage, both supporting 0.91V–V_OUT input range, 1.5µA quiescent current, and synchronous rectification for battery-powered applications such as single/dual-cell alkaline or NiMH systems.

For engineers reviewing the MAX1724EVKIT datasheet, MAX1724EVKIT pinout, MAX1724EVKIT application, or MAX1724EVKIT equivalent, this board enables rapid validation of MAX1722/MAX1723/MAX1724 boost converters under real-world low-voltage startup conditions (down to 0.91V), adjustable output configuration (2.0V–5.5V), shutdown mode verification (0.1µA typ), and efficiency benchmarking up to 90% with 200kHz operation.

Technical Context

The MAX1724EVKIT implements two discrete, surface-mount boost regulator topologies on one PCB: the left-side circuit uses the MAX1724 in fixed 3.3V output mode with SHDN control via jumper JU1, while the right-side circuit hosts the MAX1722 configured for 3.6V via R1/R2 feedback network and supports reconfiguration to 2.0V–5.5V outputs using external resistors.

Both circuits operate from 0.91V input (enabled by BATT pin functionality), deliver up to 100mA from 2-cell inputs, integrate synchronous rectification, and maintain ultra-low 1.5µA quiescent current-enabling long runtime in energy-constrained portable devices without requiring external compensation or layout changes.

Key Specifications

Availability

MAX1724EVKIT is available at Aetrix Electronics and suitable for battery-powered portable electronics, low-voltage IoT sensor nodes, and handheld medical devices requiring stable component supply, fast prototyping turnaround, and verified reference performance for ultra-low-input boost conversion.

Supply support for MAX1724EVKIT 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, automotive, communications, and consumer applications.

The MAX1722/MAX1723/MAX1724 product line was designed specifically for ultra-low-input-voltage boost conversion in space-constrained, battery-operated systems where startup below 1.0V and micropower standby are critical.

FAQ

What is the primary function of the MAX1724EVKIT?

The MAX1724EVKIT is an evaluation platform that allows engineers to validate the electrical performance, startup behavior, and regulation stability of the MAX1722, MAX1723, and MAX1724 boost converters. It provides two independent circuits-one fixed 3.3V output using the MAX1724, and one adjustable 3.6V output using the MAX1722-both operating down to 0.91V input, making the MAX1724EVKIT ideal for low-battery-voltage testing in real-world portable designs.

Can the MAX1724EVKIT evaluate the MAX1723, and how?

Yes, the MAX1724EVKIT can evaluate the MAX1723 by replacing U2 (MAX1722EZK) with a MAX1723EZK on the right-side circuit. Jumper JU2 must be configured per Table 3 to enable or disable shutdown mode, and diode D1 may be installed for improved low-voltage startup. The MAX1724EVKIT's schematic and layout support this substitution without modification, preserving full functional validation of the MAX1723's 0.1µA shutdown current and adjustable output capability.

What input voltage range does the MAX1724EVKIT support for each circuit?

The MAX1724EVKIT supports 0.91V to V_OUT input on both circuits: the left-side MAX1724 circuit operates from 0.91V to 3.3V, and the right-side MAX1722 circuit operates from 0.91V to 3.6V (or up to 5.5V when reconfigured). Inputs above V_OUT (but below 5.5V) are acceptable if output overvoltage is tolerable. This range enables direct testing with 1- or 2-cell alkaline/NiMH batteries without external regulators.

How do I configure the right-side circuit for a different output voltage using the MAX1724EVKIT?

To configure the right-side circuit for a different output voltage (2.0V–5.5V), replace feedback resistors R1 (2.00MΩ) and R2 (1.02MΩ) with values calculated using the MAX1722/MAX1723/MAX1724 data sheet's output voltage equation: V_OUT = 1.25V × (1 + R1/R2). The MAX1724EVKIT's pads accommodate standard 0805 resistors, and the board's layout maintains stability across the full adjustment range without requiring additional compensation components.

Does the MAX1724EVKIT include shutdown functionality, and how is it controlled?

Yes, the MAX1724EVKIT supports shutdown mode on both circuits. For the left-side MAX1724, jumper JU1 pins 2–3 connect SHDN to GND to activate 0.1µA shutdown. For the right-side MAX1722 or MAX1723, jumper JU2 pins 2–3 connect SHDN to GND. The MAX1724EVKIT's documentation specifies exact shunt locations and expected output behavior (e.g., V_OUT ≈ V_BATT – V_DIODE) during shutdown, enabling accurate low-power state validation.