MAX17793
Info : RECOMMENDED FOR NEW DESIGNS
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MAX17793

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

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1ku List Price Starting From $3.64
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 VIN
    • 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% (VIN = 48V and VOUT = 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
Additional Details
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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 VIN.

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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file View Data Sheet (Rev.1)
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Part Models 2
1ku List Price Starting From $3.64
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MAX17793

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Data Sheet

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UPDATED 04/12/2024
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MAX17793: 3V to 80V, 3A, High-Efficiency, Synchronous Step-Down DC-DC Converter Data Sheet (Rev.1)

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UPDATED 04/12/2024
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MAX17793: 3V～80V、3A、高効率同期整流式降圧DC/DC コンバータ データシート (Rev.1)

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User Guide

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UPDATED 06/06/2024
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MAX17793EVKITA User Guide: Evaluates: MAX17793 in 5V Output-Voltage Application (Rev.0) redirect icon

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Documentation

Documentation

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
MAX17793AFN+ 18-LFCSP-4X4X0.75
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MAX17793AFN+T 18-LFCSP-4X4X0.75
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  • Material Declaration external-link
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  • Reliablity Data external-link

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Aug 21, 2024

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MAX17793AFN+

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Software & Part Ecosystem

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Evaluation Kit

Evaluation Kits 1

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MAX17793EVKITA

Evaluates: MAX17793 in 5V Output-Voltage Application

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MAX17793EVKITA

Evaluates: MAX17793 in 5V Output-Voltage Application

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MAX17793EVKITA
Evaluates: MAX17793 in 5V Output-Voltage Application

Features and Benefits

  • Operates from a 6.5V to 80V Input Supply
  • Up to 3A Load Current
  • 5V Output Voltage
  • 400kHz Switching Frequency
  • High 91% Efficiency (VIN = 48V, IOUT = 3A)
  • Selectable PWM and SFM Modes of Operation
  • Die Temperature Monitor
  • Enable/UVLO Input, Resistor-Programmable Input Undervoltage 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 B Conducted and Radiated Emissions
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Product Detail

The MAX17793 5V output evaluation board provides a proven design to evaluate the MAX17793 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 3A 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 MAX17793 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

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MAX17793EVKITA User Guide: Evaluates: MAX17793 in 5V Output-Voltage Application (Rev.0) Download

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MAX17793EVKITA Gerber Files Download

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MAX17793EVKITA

Evaluates: MAX17793 in 5V Output-Voltage Application
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