MAX17760

PRODUCTION

4.5V to 76V, 300mA, High-Efficiency, Synchronous Step-Down DC-DC Converter

76V Synchronous Buck Converter with Internal FETs Enables High Efficiency and Low Temperature Rise

Data Sheet (Rev. 2)
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Overview

  • Reduces External Components and Total Cost
    • No Schottky—Synchronous Operation
    • Internal Compensation Components
    • All-Ceramic Capacitors, Compact Layout
  • Reduces Number of DC-DC Regulators to Stock
    • Wide 4.5V to 76V Input
    • Adjustable Output Range from 0.8V up to 88% of VIN
    • Up to 300mA Output Current
    • 200kHz, 300kHz, 400kHz, and 600kHz Programmable Switching Frequency with External Clock Synchronization
  • Reduces Power Dissipation
    • 93% Peak Efficiency
    • PFM Mode Enables Enhanced Light-Load Efficiency
    • EXTVCC Bootstrap Input for Improved Efficiency
    • 5µA Shutdown Current
  • Operates Reliably in Adverse Industrial Environments
    • Built-in Hiccup Mode Overload Protection
    • Programmable Soft-Start and Prebiased Power-up
    • Built-in Output-Voltage Monitoring with active-low RESET
    • Programmable EN/UVLO Threshold
    • Overtemperature Protection
    • CISPR 22 Class B Compliant
    • Wide -40°C to +125°C Ambient Operating Temperature Range/ -40°C to +150°C Junction Temperature Range

The Himalaya series of voltage regulator ICs, power modules, and chargers enable cooler, smaller, and simpler power supply solutions.The MAX17760/MAX17760A are high-efficiency, high-voltage, Himalaya synchronous step-down DC-DC converters with integrated MOSFETs that operate over a 4.5V to 76V input-voltage range. They can deliver up to 300mA current. Output voltage is programmable from 0.8V up to 88% of input voltage (VIN). Built-in control loop compensation eliminates the need for external components.

The MAX17760/MAX17760A feature a peak-current-mode control architecture. The devices can be operated in either the forced pulse-width modulation (PWM) or pulse-frequency modulation (PFM) control schemes. Forced PWM mode provides constant frequency operation at all loads for frequency sensitive applications, while PFM mode provides superior light-load efficiency by skipping pulses. The device integrates an open drain active-low RESET output voltage monitor, adjustable input undervoltage lockout (EN/UVLO) and programmable soft-start. The feedback voltage regulation accuracy over -40°C to +125°C is +1.6% to -1.7%. The MAX17760 is available in a compact 12-pin (3mm x 3mm) TDFN package. Simulation models are available.

 

Applications

  • Industrial Control Power Supplies
  • General Purpose Point-of-Load
  • Distributed Supply Regulation
  • Base Station Power Supplies
  • Wall Transformer Regulation
  • High Voltage Single-Board Systems
MAX17760
4.5V to 76V, 300mA, High-Efficiency, Synchronous Step-Down DC-DC Converter
MAX17760: Simplified Application Circuit
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Documentation

Data Sheet 1

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Software Resources

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • MAX17760

EE-Sim Power® Tools 1

The EE-Sim DC-DC Converter Tool uses your requirements to quickly create a complete power design including a schematic, BOM with commercially available parts, and time and frequency domain simulations. Your customized schematic can be downloaded for further analysis in the standalone EE-Sim OASIS Simulator, featuring SIMPLIS and SIMetrix SPICE engines.

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SIMPLIS Models 1

LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

MAX17760BEVKIT

Evaluation Kit for the MAX17760 in 12V Output-Voltage Application

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Features and Benefits

  • Operates from a 16V to 76V Input Supply
  • 12V Output Voltage
  • Up to 300mA Output Current
  • 400kHz Switching Frequency
  • Enable/UVLO Input, Resistor-Programmable UVLO Threshold
  • Adjustable Soft-Start Time
  • MODE Pin to Select between PWM or PFM Modes
  • Bootstrap Bias Input for Improved Efficiency
  • Open-Drain Active-Low RESET Output
  • External Clock Synchronization
  • Overcurrent and Overtemperature Protection
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX17760BEVKIT# evaluation kit (EV kit) provides a proven design to evaluate the MAX17760 high-efficiency, high-voltage, synchronous step-down DC-DC converter in a TDFN package. The EV kit generates 12V at load currents up to 300mA from a 16V to 76V input supply. The EV kit features a 400kHz switching frequency for optimum efficiency and component size. The EV kit features adjustable input undervoltage lockout, adjustable soft-start, adjustable switching frequency, open-drain active-low RESET signal, and external clock synchronization. The EV kit also provides a good layout example, which is optimized for thermal performance. For more details about the IC Benefits and Features, refer to the MAX17760 IC data sheet.

Applications

  • Base Station Power Supplies
  • Distributed Supply Regulation
  • General Purpose Point-of-Load
  • High Voltage Single-Board Systems
  • ndustrial Control Power Supplies
  • Wall Transformer Regulation

MAX17760AEVKIT

Evaluation Kit for the MAX17760 in 5V Output-Voltage Application

Buy Now View Details

Features and Benefits

  • Operates from a 7V to 76V Input Supply
  • 5V Output Voltage
  • Up to 300mA Output Current
  • 400kHz Switching Frequency
  • Enable/UVLO Input, Resistor-Programmable UVLO Threshold
  • Adjustable Soft-Start Time
  • MODE Pin to Select between PWM or PFM Modes
  • Bootstrap Bias Input for Improved Efficiency
  • Open-Drain Active-Low RESET Output
  • External Clock Synchronization
  • Overcurrent and Overtemperature Protection
  • Proven PCB Layout
  • Fully Assembled and Tested
  • Complies with CISPR22 (EN55022) Class B Conducted and Radiated Emissions

Product Details

The MAX17760AEVKIT# evaluation kit (EV kit) provides a proven design to evaluate the MAX17760 high-efficiency, high-voltage, synchronous step-down DC-DC converter in a TDFN package. The EV kit generates 5V at load currents up to 300mA from a 7V to 76V input supply. The EV kit features a 400kHz switching frequency for optimum efficiency and component size. The EV kit features adjustable input undervoltage lockout, adjustable soft-start, adjustable switching frequency, open-drain active-low RESET signal, and external clock synchronization. The EV kit also provides a good layout example, which is optimized for conducted, radiated EMI, and thermal performance. For more details about the IC benefits and features, refer to the MAX17760 IC data sheet.

Applications

  • Base Station Power Supplies
  • Distributed Supply Regulation
  • General Purpose Point-of-Load
  • High Voltage Single-Board Systems
  • Industrial Control Power Supplies
  • Wall Transformer Regulation
MAX17760BEVKIT
Evaluation Kit for the MAX17760 in 12V Output-Voltage Application
MAX17760AEVKIT
Evaluation Kit for the MAX17760 in 5V Output-Voltage Application

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