Analog Devices Inc./Maxim Integrated MAX16491EVKIT#

Overview

MAX16491EVKIT# from Analog Devices is a fully assembled and tested evaluation platform for the MAX16491 high-efficiency, 9A synchronous step-down regulator IC. It supports 4.5V–16V input, delivers up to 9A at 3.3V (preset output), and features Quick-PWM™ architecture for fast transient response in compact power delivery applications such as FPGA core supplies and telecom infrastructure.

For engineers reviewing the MAX16491EVKIT# datasheet, MAX16491EVKIT# pinout, MAX16491EVKIT# application, or MAX16491EVKIT# equivalent, this kit enables rapid validation of MAX16491 performance-including programmable switching frequency (up to 1MHz), soft-start timing, OCP limits, remote sense accuracy, and efficiency across light-to-full load (94%–96%).

Technical Context

The MAX16491EVKIT# implements the MAX16491 IC in its native 19-ball WLCSP (2.2mm × 2.8mm) package with full peripheral support: integrated boost switch, ceramic-input/output capacitor compatibility, differential remote sensing with open-circuit detection, and analog current/temperature reporting capability.

It provides configurable operation via jumper-selectable bias (1.8V LDO U2), enable (OE), status (STAT), and scenario selection (R_SEL/C_SEL) to set nominal switching frequency (e.g., 860kHz default), soft-start time (6ms), and valley OCP threshold (6.45A), all aligned with the MAX16491's Quick-PWM™ control loop and adaptive dead-time architecture.

Key Specifications

Availability

MAX16491EVKIT# is available at Aetrix Electronics and suitable for FPGA power sequencing, telecom base station DC-DC conversion, and high-density server VRM prototyping requiring stable component supply, quick-turn evaluation, and production-ready reference design validation.

Supply support for MAX16491EVKIT# 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

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, communications, and automotive markets.

The MAX16491EVKIT# belongs to Analog Devices' high-current, high-efficiency power management evaluation platform family, designed specifically to accelerate development of compact, fast-transient, multi-rail power systems for advanced processors and ASICs.

FAQ

What is the primary function of the MAX16491EVKIT#?

The MAX16491EVKIT# is a ready-to-use evaluation board that demonstrates and validates the performance of the MAX16491 synchronous step-down regulator IC. It provides full hardware implementation-including input/output filtering, bias generation (U2/U3 LDOs), jumpers for configuration (J4, J12, J15), test points (J8, J11, J13), and a 0.47µH power inductor-to enable immediate measurement of efficiency, transient response, and regulation accuracy without PCB design effort.

Does the MAX16491EVKIT# support adjustable output voltage?

Yes, the MAX16491EVKIT# supports adjustable output voltage from 0.6V to 5.5V. The preset 3.3V output is set by resistor divider RFB1/RFB2 on the board, but users can replace these resistors to configure other voltages per Equation 1 in the MAX16491 datasheet. Reference voltage selection (0.6V, 0.95V, or external 0.8V–1.1V) is controlled by R_SEL (R1) and enables optimized DC accuracy and common-mode rejection.

How is the MAX16491EVKIT# powered and enabled?

The MAX16491EVKIT# accepts 4.5V–16V DC via banana jacks (J17/J18). Regulator enable is controlled through the OE pin: it is pulled HIGH to 1.8V via jumper J15 (4–6) when the onboard MIC5235-1.8YM5 LDO (U2) is active (shunt on J4 + J12). Alternatively, an external 1.8V supply can be applied directly to J12–2 and J10–1 to bypass the LDO and avoid bias current interference during efficiency testing.

What protection and monitoring features are accessible on the MAX16491EVKIT#?

The MAX16491EVKIT# exposes all key MAX16491 monitoring and protection signals: STAT pin (J9) reports power-good/fault status via open-drain output; differential sense lines (SENSE+, SENSE−) connect to J11/J13 for remote voltage sensing with open-circuit detection; and analog current/temperature reporting is available at dedicated pins per the MAX16491 datasheet. Input UVLO/OVLO and adaptive dead-time control operate autonomously without user intervention.

Can the MAX16491EVKIT# be used to evaluate different switching frequencies?

Yes, the MAX16491EVKIT# supports six programmable switching frequency options (fSW #1–#6) via C_SEL capacitor value (0pF, 200pF, or 820pF) and R_SEL resistor value (e.g., 2.67kΩ for 860kHz default). Table 1 in the MAX16491EVKIT# user guide maps each R_SEL/C_SEL combination to specific fSW, soft-start time, OCP threshold, and operating mode (CCM/DCM), enabling systematic optimization for EMI, efficiency, or thermal performance.