Analog Devices Inc./Maxim Integrated MAX1522EVKIT

Overview

MAX1522EVKIT from Maxim Integrated is an evaluation kit for the MAX1522 SOT23 boost controller IC, enabling rapid prototyping of step-up, SEPIC, and flyback DC-DC converters. It supports input voltages from 2.7V to 4.2V, delivers up to 12V output at 350mA, and features pin-selectable 0.5µs/3µs on-time, soft-start, and latched fault protection - validated in a reference design with FDC633N MOSFET, 33µH inductor, and MBR0530 Schottky diode.

For engineers reviewing the MAX1522EVKIT datasheet, MAX1522EVKIT pinout, MAX1522EVKIT application, or MAX1522EVKIT equivalent, this kit provides verified layout, BOM, thermal performance data, and transient response waveforms (line/load/soft-start/fault) for low-cost consumer power designs including PDAs, digital cameras, and battery-powered LCD bias supplies.

Technical Context

The MAX1522EVKIT implements the MAX1522's fixed on-time, minimum off-time control architecture with external NMOS gate drive (EXT pin), feedback regulation at 1.25V (FB), and shutdown control (SHDN). It validates bootstrapped/nonbootstrapped VCC sourcing, 3.2ms hardware soft-start, and latched short-circuit protection triggered when FB falls ≤575mV.

Tested per Figure 1 of DS19-1926 Rev 1, the kit uses a 33µH CDR74B-330 inductor, 33µF TPSD336M020R0200 tantalum output capacitor, and 130kΩ/15.0kΩ resistor divider to set 12V output - confirming operation across 2.7V–4.2V input with >85% efficiency at 100mA and <100mV AC-coupled output ripple under load transients.

Key Specifications

Availability

MAX1522EVKIT is available at Aetrix Electronics and suitable for PDA power management, digital camera flash charging, and LCD bias supply development requiring stable component supply, full documentation access, and production-ready reference design validation.

Supply support for MAX1522EVKIT 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 industrial, automotive, and consumer applications.

The MAX1522EVKIT belongs to Maxim's SOT23 boost controller evaluation platform family, designed to accelerate adoption of ultra-compact, low-cost DC-DC controllers in space-constrained battery-powered devices.

FAQ

What is the primary function of the MAX1522EVKIT?

The MAX1522EVKIT is a fully assembled and tested evaluation board for the MAX1522 boost controller IC. It demonstrates a complete 12V step-up converter using the MAX1522EUT-T in a 6-pin SOT23 package, with validated component selection (FDC633N MOSFET, 33µH inductor, MBR0530 diode), layout, and performance metrics including efficiency, transient response, and fault behavior - enabling immediate lab validation and design reuse.

Does the MAX1522EVKIT support both bootstrapped and nonbootstrapped configurations?

No - the MAX1522EVKIT implements only the nonbootstrapped configuration as specified for the MAX1522 in Figure 1 of DS19-1926 Rev 1, with VCC tied directly to VIN (2.7V–4.2V). It does not include the 10Ω series resistor or bootstrap capacitor required for bootstrapped operation, which is reserved for MAX1524-based designs per the datasheet.

Can the MAX1522EVKIT be used to evaluate the MAX1523 or MAX1524?

No - the MAX1522EVKIT is specifically configured for the MAX1522, with component values (e.g., 130kΩ/15.0kΩ feedback divider) and layout optimized for its 2.7V–4.2V input and 12V output. The MAX1523 shares pinout but lacks latched fault mode, and the MAX1524 requires bootstrapped startup below 2.5V - neither is electrically or thermally validated on this board.

What output capacitor type is used on the MAX1522EVKIT and why?

The MAX1522EVKIT uses a 33µF, 20V tantalum capacitor (TPSD336M020R0200) as the main output capacitor. This is required because the MAX1522 is a voltage-mode controller that relies on capacitor ESR for cycle-to-cycle stability; ceramic capacitors (low ESR) would cause instability without a feed-forward network, which is not populated on this board.

Where can I find the schematic, bill of materials, and test data for the MAX1522EVKIT?

The official MAX1522EVKIT schematic, BOM, PCB layout files, and full test report (including efficiency curves, transient waveforms, and thermal images) are provided in Maxim's DS19-1926 Rev 1 datasheet, available for download from the Analog Devices website under the MAX1522 product page - no third-party sources or incomplete distributor summaries are used.