MAX17795

RECOMMENDED FOR NEW DESIGNS

3V to 80V, 5A, High-Efficiency, Synchronous Step-Down DC-DC Converter

Data Sheet (Rev. 0) Product Selection Table

Part Models: 2
1ku List Price: price unavailable

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Overview

Reduces Solution Size and Cost

No Schottky–Synchronous Operation
Internal Compensation Components
All-Ceramic Capacitors, Compact Layout
Adjustable Output Range from 0.6V to 90% of V_IN
300kHz to 1.5MHz Adjustable Frequency with External Clock Synchronization
EMI with Symmetrical IN Pins
4mm x 4mm 18L-FC2QFN

Reduces Power Dissipation

Peak Efficiency of 92% (V_IN = 48V and V_OUT = 5V)
Enhanced Light-Load Efficiency with Switching Frequency Modulation (SFM) Mode
External Bias Input for Improved Efficiency

Die Temperature Monitoring
Operates Reliably in Adverse Industrial Environments

Built-In Hiccup-Mode Overload Protection
Programmable Soft-Start
Built-In Output-Voltage Monitoring with RESET/TJ Pin
Programmable EN/UVLO Threshold
Complies with CISPR32 (EN55032) Class B Conducted and Radiated Emissions
High Industrial -40°C to +125°C Ambient Operating Temperature Range/-40°C to +150°C Junction Temperature Range

The MAX17795 is a high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operating over an input voltage range of 3V to 80V. The device can deliver up to 5A current and generate output voltages ranging from 0.6V up to 90% of V_IN.

The device features a MODE/SYNC pin that can be used to program the device in forced pulse-width modulation (PWM) or switching frequency modulation (SFM) modes of operation and to synchronize the internal clock to an external clock. The device offers an enable/input undervoltage lockout (EN/UVLO) pin to program the desired input voltage at which the converter turns on/off. The device also has a soft-start (SS) pin to reduce inrush currents during startup. In addition, the device features a RESET/TJ pin, which can be used either to monitor the status of output voltage or die temperature. The die temperature monitor allows the user to directly measure the silicon die temperature instead of relying on theoretical estimation, thus enabling robust, reliable power supply design.

APPLICATIONS

Industrial, Avionics and Heavy Equipment
Factory and Building Automation
Motor Control
General Purpose Power Supply

Part Models: 2
1ku List Price: price unavailable

Documentation

Data Sheet 1

MAX17795: 3V to 80V, 5A, High-Efficiency, Synchronous Step-Down DC-DC Converter Data Sheet (Rev.0) 01/20/2026

User Guide 1

MAX17795EVKITA User Guide: Evaluates: MAX17795 in 5V Output-Voltage Application (Rev.0) 01/20/2026

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX17795AFN+	LFCSP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
MAX17795AFN+T	LFCSP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys

Software Resources

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Evaluation Kits

Evaluates: MAX17795 in 5V Output-Voltage Application

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Features and Benefits

Operates from a 6.5V to 80V Input Supply
Up to 5A Load Current
5V Output Voltage
400kHz Switching Frequency
High 92% Efficiency (V_IN = 48V, I_OUT = 5A)
Selectable PWM and SFM Modes of Operation
Die Temperature Monitor
Enable/UVLO Input, Resistor-Programmable InputUndervoltage Lockout (UVLO) Threshold
Adjustable Soft-Start Time
Open-Drain RESET Output
External Frequency Synchronization
Overcurrent and Overtemperature Protection
Proven Printed Circuit Board (PCB) Layout
Fully Assembled and Tested
Complies with CISPR 32 (EN55032) Class BConducted and Radiated Emissions

Product Details

The MAX17795 5V output evaluation board provides a proven design to evaluate the MAX17795 high-voltage, high-efficiency, synchronous step-down DC-DC converters. The application circuit is configured to demonstrate optimum performance and component sizes in the evaluation board. The evaluation board also provides a good layout example, optimized for conducted, radiated electromagnetic interference (EMI), and thermal performance.

The evaluation board is configured to operate at 400kHz switching frequency over a 6.5V to 80V input voltage range and deliver up to 5A load current.

The evaluation board features an adjustable input undervoltage-lockout, adjustable soft-start, open-drain RESET/TJ, die temperature monitor, external clock synchronization, thermal shutdown, and selectable mode of operation [pulse-width modulation (PWM) or switching frequency modulation (SFM)].

The MAX17795 converter data sheet provides a complete description of the part that should be read in conjunction with this user guide before operating the evaluation board.

Resources

MAX17795EVKITA User Guide: Evaluates: MAX17795 in 5V Output-Voltage Application (Rev.0)
1/20/2026

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