MAX17631

PRODUCTION

4.5V to 36V, 1.5A, High-Efficiency, Synchronous Step-Down DC-DC Converter

A High-Efficiency, High-Voltage, Synchronous Step-Down DC-DC Converter with Integrated MOSFETs

Data Sheet (Rev. 0) Product Selection Table
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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 36V Input
    • Adjustable Output Voltage Range from 0.9V up to 90% of VIN
    • Delivers Up to 1.5A Over the Temperature Range
    • 400kHz to 2.2MHz Adjustable Frequency with External Clock Synchronization
    • Available in a 16-Pin, 3mm x 3mm TQFN Package
  • Reduces Power Dissipation
    • Peak Efficiency of 95%
    • PFM and DCM Modes Enable Enhanced Light-Load Efficiency
    • Auxiliary Bootstrap Supply (EXTVCC) for Improved Efficiency
    • 2.8μA Shutdown Current
  • Operates Reliably in Adverse Industrial Environments
    • Hiccup-Mode Overload Protection
    • Adjustable and Monotonic Startup with Prebiased Output Voltage
    • Built-In Output-Voltage Monitoring with RESET (Active Low)
    • Programmable EN/UVLO Threshold
    • Overtemperature Protection
    • High Industrial -40°C to +125°C Ambient Operating Temperature Range/ -40°C to +150°C Junction Temperature Range

The MAX17631 is a high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operating over an input-voltage range of 4.5V to 36V. It can deliver up to 1.5A current. The MAX17631 is available in three variants, MAX17631A, MAX17631B and MAX17631C. The MAX17631A and MAX17631B are fixed 3.3V and fixed 5V output parts, respectively. The MAX17631C is an adjustable output voltage (from 0.9V up to 90% of VIN) part. Built-in compensation across the output-voltage range eliminates the need for external compensation components.

The MAX17631 features peak-current-mode control architecture. The device can be operated in the forced pulse- width modulation (PWM), or pulse-frequency modulation (PFM), or discontinuous-conduction mode (DCM) to enable high efficiency under full-load and light-load conditions. The MAX17631 offers a low minimum on-time that allows high switching frequencies and a smaller solution size.

The feedback-voltage regulation accuracy over -40°C to +125°C for the MAX17631A/MAX17631B/MAX17631C is ±1.2%.The device is available in a 16-pin (3mm x 3mm) TQFN 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
MAX17631
4.5V to 36V, 1.5A, High-Efficiency, Synchronous Step-Down DC-DC Converter
MAX17631: Functional Diagram
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Documentation

Data Sheet 1

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Software Resources

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Tools & Simulations

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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Evaluation Kits

MAX17631BEVKIT

Evaluation Kit for the MAX17631 5V Output-Voltage Application

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Features and Benefits

  • Operates from a 6.5V to 36V Input Supply
  • 5V Output Voltage
  • Delivers Up to 1.5A Output Current
  • 400kHz Switching Frequency
  • Enable/UVLO Input, Resistor-Programmable UVLO Threshold
  • Adjustable Soft-Start Time
  • Open-Drain Active-Low RESET Output
  • Overcurrent and Overtemperature Protection
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX17631BEVKIT# Evaluation Kit (EV kit) provides a proven design to evaluate the MAX17631B highefficiency, synchronous step-down DC-DC converter. The EV kit provides 5V/1.5A at the output from a 6.5V to 36V input supply. The switching frequency of the EV kit is preset to 400kHz for optimum efficiency and component size. The EV kit features adjustable input undervoltage lockout, adjustable soft-start, open-drain active-low RESET signal, and external clock synchronization.The EV kit layout is optimized for thermal performance. For more details about the IC benefits and features, refer to the MAX17631 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

MAX17631AEVKIT

Evaluation Kit for the MAX17631 3.3V Output-Voltage Application

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Features and Benefits

  • Operates from a 4.5V to 36V Input Supply
  • 3.3V Output Voltage
  • Delivers Up to 1.5A Output Current
  • 400kHz Switching Frequency
  • Enable/UVLO Input, Resistor-Programmable UVLO Threshold
  • Adjustable Soft-Start Time
  • Open-Drain Active-Low RESET Output
  • Overcurrent and Overtemperature Protection
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX17631AEVKIT# Evaluation Kit (EV kit) provides a proven design to evaluate the MAX17631A high-efficiency, synchronous step-down DC-DC converter. The EV kit provides 3.3V/1.5A at the output from a 4.5V to 36V input supply. The switching frequency of the EV kit is preset to 400kHz for optimum efficiency and component size. The EV kit features adjustable input undervoltage lockout, adjustable soft-start, open-drain active-low RESET signal, and external clock synchronization. The EV kit layout is optimized for thermal performance. For more details about the IC benefits and features, refer to the MAX17631 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

MAX17631C5EVKIT

Evaluation Kit for the MAX17631 5V Output-Voltage Application

Buy Now View Details

Features and Benefits

  • Operates from a 6.5V to 36V Input Supply
  • 5V Output Voltage
  • Delivers Up to 1.5A Output Current
  • 400kHz Switching Frequency
  • Enable/UVLO Input, Resistor-Programmable UVLO Threshold
  • Adjustable Soft-Start Time
  • Open-Drain Active-Low RESET Output
  • Overcurrent and Overtemperature Protection
  • Proven PCB Layout
  • Fully Assembled and Tested
  • Complies with CISPR22(EN55022) Class B Conducted and Radiated Emissions

Product Details

The MAX17631C5EVKIT# evaluation kit (EV kit) provides a proven design to evaluate the MAX17631C highefficiency, synchronous step-down DC-DC converter. The EV kit provides 5V/1.5A at the output from a 6.5V to 36V input supply. The switching frequency of the EV kit is preset to 400kHz for optimum efficiency and component size. The EV kit features adjustable input undervoltage lockout, adjustable soft-start, 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 MAX17631 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
MAX17631BEVKIT
Evaluation Kit for the MAX17631 5V Output-Voltage Application
MAX17631AEVKIT
Evaluation Kit for the MAX17631 3.3V Output-Voltage Application
MAX17631C5EVKIT
Evaluation Kit for the MAX17631 5V Output-Voltage Application

Latest Discussions

1 Years Ago
MODE/SYNC Input Specification
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