Analog Devices Inc./Maxim Integrated MAX17793EVKITA#

Overview

MAX17793EVKITA# from Analog Devices is a fully assembled and tested evaluation board designed to validate the MAX17793 high-voltage synchronous step-down DC-DC converter in a fixed 5V output configuration, operating from 6.5V–80V input at 400kHz switching frequency with up to 3A load current and 91% peak efficiency (VIN = 48V, IOUT = 3A).

For engineers reviewing the MAX17793EVKITA# datasheet, MAX17793EVKITA# pinout, MAX17793EVKITA# application, or MAX17793EVKITA# equivalent, this board delivers a CISPR 32 Class B-compliant reference design with adjustable UVLO, soft-start, RESET/TJ monitoring, external clock sync, and PWM/SFM mode selection - all implemented on an optimized PCB layout for EMI and thermal performance.

Technical Context

The MAX17793EVKITA# implements the MAX17793 IC in a non-isolated buck topology with fixed 5V output, configured using resistor dividers R3/R4. It operates at 400kHz by default (no RT resistor installed), supports input undervoltage lockout via jumper JU1, and enables dual-mode operation (PWM or SFM) via jumper JU2.

Thermal and fault management includes die temperature monitoring or RESET output selection via jumper JU3, open-drain RESET signaling, overcurrent protection verified at 5A, and thermal shutdown. The board integrates a 6.8µH power inductor (XGL5050-682ME), 4.7µF input capacitors, and 22µF X7R output capacitors - all selected per MAX17793 datasheet guidelines.

Key Specifications

Availability

MAX17793EVKITA# is available at Aetrix Electronics and suitable for industrial power supply validation, high-voltage DC-DC design verification, and automotive subsystem prototyping requiring stable component supply and pre-validated EMI performance.

Supply support for MAX17793EVKITA# 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, headquartered in Wilmington, MA.

The MAX17793EVKITA# belongs to Analog Devices' high-voltage power management evaluation platform family, engineered to accelerate development of robust, EMI-compliant DC-DC solutions for industrial, telecom, and transportation systems.

FAQ

What is the primary function of the MAX17793EVKITA#?

The MAX17793EVKITA# is a dedicated evaluation board that demonstrates the MAX17793 synchronous step-down DC-DC converter in a fixed 5V output configuration. It provides a fully assembled, tested, and EMI-optimized reference design for validating performance across the 6.5V–80V input range at up to 3A load. Engineers use the MAX17793EVKITA# to verify thermal behavior, efficiency curves, transient response, and protection features before custom PCB design.

Does the MAX17793EVKITA# support adjustable output voltage?

No - the MAX17793EVKITA# is factory-configured for a fixed 5V output using resistor dividers R3 and R4. While the underlying MAX17793 IC supports adjustable output from 0.6V to (0.9 × VIN), modifying the output voltage on the MAX17793EVKITA# requires replacing R3/R4 and recalculating feedback values per the MAX17793 datasheet. The board does not include onboard potentiometers or jumpers for voltage adjustment.

How is input undervoltage lockout (UVLO) configured on the MAX17793EVKITA#?

UVLO on the MAX17793EVKITA# is controlled via jumper JU1. With no shunt installed (default), UVLO is enabled at ~6.5V using the internal resistor divider (R1/R2). Installing a shunt across pins 2–3 disables the MAX17793 entirely; installing across pins 1–2 connects EN/UVLO directly to VIN for immediate enablement. Resistor values R1 = 3.32MΩ and R2 = 887kΩ set the threshold per the MAX17793's UVLO equation.

Can the MAX17793EVKITA# be synchronized to an external clock?

Yes - the MAX17793EVKITA# supports external clock synchronization via the MODE/SYNC pin when operating in either PWM or SFM mode. The external clock must fall between 1.1× and 1.4× the programmed switching frequency (400kHz by default), with minimum on/off times >100ns. Synchronization is enabled by leaving jumper JU2 open (SFM) or installing a shunt at 1–2 (PWM), then applying the clock signal to the MODE/SYNC test point.

What thermal and fault protection features are implemented on the MAX17793EVKITA#?

The MAX17793EVKITA# implements overtemperature shutdown, cycle-by-cycle overcurrent protection (verified to 5A), and configurable RESET/TJ monitoring via jumper JU3. In default configuration (shunt at pins 1–2), the open-drain RESET output asserts low if VOUT drops below 92% of nominal. With shunt at pins 2–3, the same pin reports die temperature status - asserting low when junction temperature exceeds 150°C. Thermal performance is validated using the board's optimized copper pour and component placement.