Analog Devices Inc./Maxim Integrated MAX17112EVKIT+

Overview

The MAX17112EVKIT+ from Maxim Integrated is an evaluation kit for the MAX17112 high-performance, step-up DC-DC converter IC used to power active-matrix TFT-LCD panels. It supports input voltages from 2.6V to 5.5V, delivers up to 20V output at 600mA, and features 1MHz fixed-frequency current-mode PWM control with integrated n-channel MOSFET, programmable soft-start, and input overvoltage protection up to 24V - enabling rapid prototyping of notebook display power supplies.

For engineers reviewing the MAX17112EVKIT+ datasheet, MAX17112EVKIT+ pinout, MAX17112EVKIT+ application, or MAX17112EVKIT+ equivalent, this kit provides validated reference design, component-level test points, thermal performance characterization, and layout guidance for integrating the MAX17112 into LCD bias supply rails with fast transient response and low EMI.

Technical Context

The MAX17112EVKIT+ implements the full functional circuit of the MAX17112 IC, including a 2.7μH power inductor, Schottky rectifier diode, 10μF/25V output capacitors, 4.7μF/10V input capacitors, and precision feedback resistors (R3 = 20kΩ, R4 = 221kΩ) configured for +15V/600mA output. It replicates the IC's current-mode, fixed-frequency (1MHz) PWM architecture with slope compensation, COMP-loop compensation (RCOMP = 47kΩ, CCOMP1 = 560pF), and SHDN-controlled startup timing.

All critical signal paths - including high-current LX loop, FB voltage divider, SS capacitor node, and exposed-pad thermal grounding - follow Maxim's validated PCB layout guidelines. The board includes test points for VIN, VOUT, LX, COMP, FB, SHDN, and SS, enabling direct measurement of switching waveforms, load-transient response (e.g., 50mA→550mA in 100μs), efficiency curves, and OVP behavior under surge conditions.

Key Specifications

Availability

The MAX17112EVKIT+ is available at Aetrix Electronics and suitable for notebook computer display development, LCD monitor panel validation, and TFT-LCD bias supply design requiring stable component supply, pre-validated thermal performance, and production-ready layout reference.

Supply support for MAX17112EVKIT+ 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, computing, and consumer applications.

The MAX17112 product line is designed specifically for high-efficiency, compact-area active-matrix TFT-LCD panel power supplies - delivering regulated high-voltage bias rails with fast transient response, integrated protection, and minimal external component count.

FAQ

What is the primary function of the MAX17112EVKIT+?

The MAX17112EVKIT+ is an evaluation kit that demonstrates and validates the operation of the MAX17112 step-up DC-DC converter IC. It provides a fully assembled, tested PCB implementing the typical +15V/600mA output configuration described in the MAX17112 datasheet, including all critical passive components, layout-optimized grounding, and accessible test points for performance characterization of the MAX17112 in TFT-LCD power applications.

Does the MAX17112EVKIT+ support adjustable output voltage?

Yes - the MAX17112EVKIT+ uses a resistor divider (R3 = 20kΩ, R4 = 221kΩ) to set the output to +15V, but it is fully reconfigurable. By replacing R4 per the formula R4 = R3 × (VOUT/VFB − 1) where VFB = 1.24V, users can adjust the MAX17112EVKIT+ output from VIN up to 20V, maintaining regulation accuracy and stability as verified in the MAX17112's electrical characteristics table.

Can the MAX17112EVKIT+ be used to evaluate input overvoltage protection?

Yes - the MAX17112EVKIT+ directly supports OVP testing. The MAX17112 IC on the board integrates input overvoltage protection that disables the internal switch when VIN exceeds ~6.6V (typ), preventing damage from surges up to 24V. Users can apply controlled overvoltage transients to the IN pin and observe VL rail collapse, LX switching cessation, and recovery behavior using the provided test points and oscilloscope access to the MAX17112EVKIT+.

What thermal management features does the MAX17112EVKIT+ implement?

The MAX17112EVKIT+ implements Maxim's recommended thermal layout: the MAX17112's exposed pad (EP) is soldered to a dedicated copper pour connected to all four GND pins, forming a low-thermal-resistance path to the board's internal ground plane. This design ensures junction temperature remains within the −40°C to +85°C operating range under full 600mA load, as validated by thermal imaging in Maxim's application notes for the MAX17112EVKIT+.

Is the MAX17112EVKIT+ compatible with other MAX171xx evaluation boards?

No - the MAX17112EVKIT+ is purpose-built for the MAX17112 and not mechanically or electrically compatible with other MAX171xx kits. While the MAX17110/MAX17111 share similar architecture, differences in pinout (e.g., SS pin presence), compensation requirements, and OVP thresholds mean the MAX17112EVKIT+'s layout, component values, and test point locations are specific to the MAX17112 IC and cannot be reused for those variants without redesign.