Analog Devices Inc./Maxim Integrated MAX1917EVKIT

Overview

MAX1917EVKIT from Maxim Integrated is an evaluation kit for the MAX1917 synchronous buck controller, designed to generate and regulate DDR memory termination supplies (VTT and VTTR) at 1/2VDDR with ±1% tracking accuracy. It supports up to 25A bidirectional current sourcing/sinking, operates from 4.5V–14V input, and implements Quick-PWM™ control for fast transient response in notebook, server, and desktop DDR power systems.

For engineers reviewing the MAX1917EVKIT datasheet, MAX1917EVKIT pinout, MAX1917EVKIT application, or MAX1917EVKIT equivalent, this kit enables rapid validation of VTT/VTTR tracking performance, programmable switching frequency (200–550kHz), current-limit configuration via ILIM resistor, voltage positioning implementation, and POK logic behavior under dynamic load transitions typical of DDR2/DDR3 memory interfaces.

Technical Context

The MAX1917EVKIT implements the MAX1917 controller in a fully assembled, tested circuit featuring dual N-FET synchronous rectification, integrated VL linear regulator (5V output), and VTTR reference capable of ±25mA sourcing/sinking. It replicates the exact functional pinout and biasing conditions of the 16-pin QSOP MAX1917EEE, including EN/HSD high-side drain monitoring, FSEL frequency selection, and ILIM current-limit programming.

It validates the core architecture: valley-current sensing without sense resistors, adaptive dead-time control between DH/DL drivers, Quick-PWM™ on-time computation dependent on EN/HSD and DDR inputs, and POK open-drain assertion when both VTT and VTTR remain within ±12% of 1/2VDDR. The board supports voltage positioning via external droop resistor and accommodates input voltages up to 14V with JEDEC-compliant output capacitance.

Key Specifications

Availability

MAX1917EVKIT is available at Aetrix Electronics and suitable for DDR memory power design, high-speed termination supply validation, and synchronous buck controller qualification requiring stable component supply and documented reference performance.

Supply support for MAX1917EVKIT 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 computing, communications, and industrial applications.

The MAX1917 product line delivers highly integrated, high-efficiency synchronous buck controllers optimized specifically for DDR memory termination and tracking supply generation in space-constrained, thermally demanding platforms.

FAQ

What is the primary function of the MAX1917EVKIT?

The MAX1917EVKIT is a fully assembled evaluation platform for the MAX1917 synchronous buck controller. It enables engineers to validate real-world performance of VTT and VTTR generation-including 1/2VDDR tracking accuracy, 25A bidirectional current handling, Quick-PWM™ transient response, POK signaling, and voltage positioning-using JEDEC-compliant external components and standard DDR memory supply configurations.

Does the MAX1917EVKIT support DDR2 and DDR3 memory termination requirements?

Yes, the MAX1917EVKIT validates the MAX1917's compliance with DDR2 and DDR3 termination specifications, including ±1% VTT/VTTR tracking of 1/2VDDR, ±40mV maximum voltage deviation during sourcing-to-sinking load transitions, and support for DDR input voltages from 1.5V to 3.6V. Its reference designs meet JEDEC capacitor selection guidelines for stable, low-ripple operation.

How is switching frequency configured on the MAX1917EVKIT?

The MAX1917EVKIT implements the MAX1917's FSEL pin functionality with selectable jumpers or solder pads to connect FSEL to GND, REF, VL, or leave it floating-enabling preset frequencies of 550kHz, 400kHz, 200kHz, or 300kHz respectively. The board also supports variable frequency tuning up to 1MHz using external circuitry per the MAX1917 datasheet Figure 3 and Table 1.

Can the MAX1917EVKIT be used to evaluate voltage positioning?

Yes, the MAX1917EVKIT includes provisions to implement passive voltage positioning as specified in the MAX1917 datasheet. A dedicated 2mΩ droop resistor location (RDRP) is provided on the board, allowing direct validation of output voltage droop versus load current-a key technique to optimize transient response and minimize required output capacitance in DDR termination applications.

What power supply requirements does the MAX1917EVKIT need for operation?

The MAX1917EVKIT requires a stable DC input between 4.5V and 14V applied to the V+ terminal, with capability to deliver ≥12A peak current for full 25A VTT/VTTR validation. It includes onboard bypass capacitors (4.7µF VL, 1µF VTTR, 0.22µF REF, 0.47µF BST) and supports optional extension to 28V input using an external resistor divider on the EN/HSD pin, per MAX1917 specification.