Analog Devices Inc./Maxim Integrated MAX8969EVKIT#

Overview

MAX8969EVKIT# from Maxim Integrated is an evaluation kit for the MAX8969 1A step-up DC-DC converter, designed to validate performance in single-cell Li-ion handheld applications. It supports output voltages from 3.3V to 5.5V, operates across 2.5V–5.5V input range, delivers up to 1A peak current, and implements True Shutdown™, automatic track mode (ATM), and skip-mode efficiency optimization. The kit enables rapid prototyping of power rails for smartphones, GPS devices, and eReaders.

For engineers reviewing the MAX8969EVKIT# datasheet, MAX8969EVKIT# pinout, MAX8969EVKIT# application, or MAX8969EVKIT# equivalent, this kit provides validated reference design, component-level test points, thermal performance characterization, and mode-switching verification (boost/ATM/track/shutdown) under real-world load transients and input voltage droop conditions.

Technical Context

The MAX8969EVKIT# implements the full functional circuit of the MAX8969 IC, including its 3MHz fixed-frequency PWM architecture with automatic frequency adjustment (1MHz–3MHz), integrated pMOS/nMOS synchronous switching, and dual-path control logic for EN/TREN-driven mode selection. It replicates the IC's critical protection behaviors: undervoltage lockout (2.2V typ), overtemperature shutdown (+165°C), short-circuit current limiting (2.6A LX_ RMS), and True Shutdown™ body-diode reversal.

This kit validates the MAX8969's three operational states-boost mode (45µA IQ), automatic track mode (65µA IQ), and track mode (30µA IQ)-using factory-trimmed feedback resistors, a 1µH shielded inductor (TOKO DFE252012), 22µF X5R output capacitor, and 4.7µF input ceramic capacitor. All layout follows Maxim's recommended 4-layer PCB guidelines with optimized ground plane and high-current trace routing.

Key Specifications

Availability

MAX8969EVKIT# is available at Aetrix Electronics and suitable for smartphone power validation, GPS PND reference design, and eReader battery rail development requiring stable component supply, pre-validated thermal performance, and production-ready layout guidance.

Supply support for MAX8969EVKIT# 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 solutions for portable, industrial, and communications systems.

The MAX8969 product line delivers compact, high-efficiency boost converters for space-constrained handheld devices, with emphasis on ultra-low quiescent current, seamless mode transitions, and robust fault protection in WLP packaging.

FAQ

What is the primary purpose of the MAX8969EVKIT#?

The MAX8969EVKIT# is a fully assembled evaluation platform for the MAX8969 1A step-up DC-DC converter. It enables engineers to verify electrical performance-including efficiency curves, transient response, mode transitions (boost/ATM/track), and protection behavior-under real operating conditions before integrating the MAX8969 into final designs for smartphones, GPS units, or eReaders.

Does the MAX8969EVKIT# support all MAX8969 output voltage variants?

Yes, the MAX8969EVKIT# supports all standard MAX8969 output voltage options (3.3V, 3.5V, 3.7V, 4.25V, 5.0V, 5.3V, 5.5V) via easily changeable feedback resistors. Each variant is validated using the same PCB layout, inductor (1µH), and capacitor set (22µF COUT, 4.7µF CIN), ensuring consistent thermal and EMI performance across configurations.

How does the MAX8969EVKIT# demonstrate True Shutdown™ functionality?

The MAX8969EVKIT# validates True Shutdown™ by measuring <1µA total system current when EN = low and TREN = low, while confirming zero reverse current flow from OUT_ to LX_ using oscilloscope current probes. This behavior is confirmed across temperature (-40°C to +85°C) and input voltage (2.5V–5.5V), matching the MAX8969 datasheet specification.

Can the MAX8969EVKIT# be used to characterize automatic track mode (ATM) timing?

Yes, the MAX8969EVKIT# includes test points and trigger-capable measurement nodes to capture ATM entry (tATM_ENTER ≤ 1µs) and exit (tATM_EXIT ≤ 1µs) transitions. Using the onboard potentiometer to sweep VIN across VATMRT thresholds (e.g., 3.15V for 3.3V VOUT_TARGET), engineers directly observe the comparator-driven mode switch on oscilloscope waveforms.

What external components are pre-installed on the MAX8969EVKIT#?

The MAX8969EVKIT# ships with a TOKO DFE252012 1µH shielded inductor, 22µF X5R 6.3V output capacitor, 4.7µF X5R 6.3V input capacitor, and precision feedback resistors for each supported VOUT option. All components meet Maxim's layout recommendations for minimal EMI, optimal thermal dissipation, and stable loop response as defined in the MAX8969 datasheet.