MAX17793

RECOMMENDED FOR NEW DESIGNS

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

Analog Devices MAX17793 Product Info

10 February 2026 5

Features

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 × 4mm 18L-FC2QFN

Reduces Power Dissipation

Peak Efficiency of 91% (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

Part details & applications

The MAX17793 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 3A 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

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