Analog Devices Inc./Maxim Integrated MAX15022EVKIT+

Overview

MAX15022EVKIT+ from Maxim Integrated is an evaluation kit for the MAX15022 dual-output, 4A/2A synchronous step-down DC-DC regulator with dual LDO controllers. It enables rapid validation of power sequencing, 180° out-of-phase operation, and digital soft-start/soft-stop in multivoltage systems operating from 2.5V to 5.5V input. The kit supports adjustable outputs from 0.6V to V_AVIN, programmable switching frequency (500kHz–4MHz), and prebiased power-up into RFID reader cards, PoE IP phones, and automotive multimedia applications.

For engineers reviewing the MAX15022EVKIT+ datasheet, MAX15022EVKIT+ pinout, MAX15022EVKIT+ application, or MAX15022EVKIT+ equivalent, this kit provides verified reference design implementation, thermal performance characterization, and functional validation of tracking/sequencing behavior, LDO controller interface, and hiccup-mode short-circuit protection under real load conditions.

Technical Context

The MAX15022EVKIT+ implements the full signal chain and power delivery architecture of the MAX15022 IC, including dual voltage-mode PWM controllers with external compensation networks, two independent LDO controller outputs (B3/B4) driving external PNP transistors, and precise enable/SEL logic for coincident, ratiometric, or sequenced power-up/down. It replicates the 28-pin TQFN-EP layout with proper PGND1/PGND2/SGND partitioning and thermal pad grounding.

It validates critical timing behaviors: 4096-cycle digital soft-start with 64-step reference ramp, 180° phase-shifted LX1/LX2 waveforms reducing RMS input ripple, and hiccup-mode fault recovery (NCL = 4 cycles, NHT = 8192 cycles). The board integrates RT resistor selection, FB divider networks, and EN biasing to demonstrate all three tracking/sequencing configurations per Figure 2 of the datasheet.

Key Specifications

Availability

MAX15022EVKIT+ is available at Aetrix Electronics and suitable for power management validation, multivoltage supply design, and automotive multimedia system development requiring stable component supply and documented reference implementation.

Supply support for MAX15022EVKIT+ 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 communications markets.

The MAX15022 product line delivers compact, high-frequency, multi-rail power regulation with integrated sequencing and LDO extension-designed specifically for space-constrained, thermally demanding applications like PoE endpoints and infotainment systems.

FAQ

What is the primary function of the MAX15022EVKIT+?

The MAX15022EVKIT+ is an evaluation kit designed to validate the full functionality of the MAX15022 dual-output buck regulator with dual LDO controllers. It enables engineers to test power sequencing, 180° out-of-phase operation, digital soft-start/soft-stop, and LDO-controlled auxiliary outputs under real-world load and thermal conditions without custom PCB design.

Does the MAX15022EVKIT+ support all three tracking/sequencing modes described in the MAX15022 datasheet?

Yes, the MAX15022EVKIT+ fully supports coincident tracking, ratiometric tracking, and sequencing as defined in the MAX15022 datasheet. Jumpers and configurable resistor networks allow users to set SEL pin state (grounded, tied to AVIN, or floating) and route EN1/EN2 feedback to implement any mode per Figure 2 of the datasheet.

Can the MAX15022EVKIT+ be used to evaluate LDO controller performance with external PNP transistors?

Yes, the MAX15022EVKIT+ includes dedicated B3 and B4 output terminals, FB3/FB4 sense points, and EN3/EN4 enable inputs to interface with external PNP pass transistors. It validates LDO controller loop stability, PSRR (>60dB at 100Hz), and output voltage deviation (<±5mV) across 10mA–500mA loads per datasheet Figures toc21–toc22.

What thermal validation data does the MAX15022EVKIT+ provide for the MAX15022 IC?

The MAX15022EVKIT+ implements the exact thermal layout specified for the MAX15022: exposed paddle soldered to a large SGND copper plane, 4-layer stackup matching JEDEC JESD51-7, and component placement optimized for heat dissipation. It confirms thermal shutdown activation at +160°C and validates θ_JA = 29°C/W under 4A/2A simultaneous load conditions.

How does the MAX15022EVKIT+ demonstrate hiccup-mode short-circuit protection?

The MAX15022EVKIT+ includes test points and oscilloscope-accessible waveforms to observe hiccup-mode behavior: cumulative current-limit detection (NCL = 4 clock cycles), 8192-cycle timeout (NHT), and automatic soft-start recovery. It validates fault response under both regulator 1 and regulator 2 short-circuit conditions, confirming coordinated shutdown per datasheet Section "PWM Current Limit and Hiccup Mode".