MAX17505

PRODUCTION

4.5V-60V, 1.7A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation

Industry's Only 60V, 1.7A Internal FET Synchronous Buck Converter

Part Models
4
1ku List Price
Starting From $2.43
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Part Details

  • Eliminates External Components and Reduces Total Cost
    • No Schottky-Synchronous Operation for High Efficiency and Reduced Cost
    • Internal Compensation for Stable Operation at Any Output Voltage
    • All-Ceramic Capacitor Solution: Ultra-Compact Layout with as Few as Eight External Components
  • Reduces Number of DC-DC Regulators to Stock
    • Wide 4.5V to 60V Input Voltage Range
    • 0.9V to 90%VIN Output Voltage
    • Delivers Up to 1.7A Over Temperature
    • 100kHz to 2.2MHz Adjustable Frequency with External Synchronization
    • MAX17505S Allows Higher Frequency Of Operation
    • Available in a 20-Pin, 4mm x 4mm TQFN Package
  • Reduces Power Dissipation
    • Peak Efficiency > 90%
    • PFM and DCM Modes for High Light-Load Efficiency
    • Shutdown Current = 2.8µA (typ)
  • Operates Reliably
    • Hiccup-Mode Current Limit and Autoretry Startup
    • Built-In Output-Voltage Monitoring (Open-Drain Active-Low RESET Pin)
    • Resistor-Programmable EN/UVLO Threshold
    • Adjustable Soft-Start and Prebiased Power-Up
    • High Industrial -40°C to +125°C Ambient Operating Temperature Range/-40°C to +150°C Junction Temperature Range
MAX17505
4.5V-60V, 1.7A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation
MAX17505: Typical Application Circuit
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Documentation

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Hardware Ecosystem

Parts Product Life Cycle Description
Internal Power Switch Buck Regulators 2
MAX17503 PRODUCTION 4.5V-60V, 2.5A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation
MAX17504 PRODUCTION 4.5V–60V, 3.5A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation
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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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SIMPLIS Models 1


Evaluation Kits

MAX17505EVKITA

Evaluation Kit for the MAX17505 in 3.3V Output-Voltage Application

Features and Benefits

  • Operates from a 4.5V to 60V Input Supply
  • 3.3V Output Voltage
  • Up to 1.7A Output Current
  • 450kHz Switching Frequency
  • Enable/UVLO Input, Resistor-Programmable UVLO Threshold
  • Adjustable Soft-Start Time
  • MODE Pin to Select Among PWM, PFM, or DCM Modes
  • Open-Drain Active-Low RESET Output
  • External Frequency Synchronization
  • Overcurrent and Overtemperature Protection
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX17505 3.3V output evaluation kit (EV kit) provides a proven design to evaluate the MAX17505 high-voltage, high-efficiency, synchronous step-down DC-DC converter. The EV kit is preset for 3.3V output at load currents up to 1.7A and features a 450kHz switching frequency 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 frequency synchronization. 

Applications

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

MAX17505EVKITB

Evaluation Kit for the MAX17505 in 5V Output-Voltage Application

Features and Benefits

  • Operates from a 6.5V to 60V Input Supply
  • 5V Output Voltage
  • Up to 1.7A Output Current
  • 500kHz Switching Frequency
  • Enable/UVLO Input, Resistor-Programmable UVLO Threshold
  • Adjustable Soft-Start Time
  • MODE Pin to Select Among PWM, PFM, or DCM Modes
  • Open-Drain Active-Low RESET Output
  • External Frequency Synchronization
  • Overcurrent and Overtemperature Protection
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX17505 5V output evaluation kit (EV kit) provides a proven design to evaluate the MAX17505 high-voltage, high-efficiency, synchronous step-down DC-DC converter. The EV kit is preset for 5V output at load currents up to 1.7A and features a 500kHz switching frequency 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 frequency synchronization. 

Applications

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

MAX17505EVKITBE

Evaluation Kit for the MAX17505 in 5V Output-Voltage Application

Features and Benefits

  • Operates from a 6.5V to 60V Input Supply
  • Programmed 5V Output Voltage, 1.7A Load Current
  • 500kHz Switching Frequency
  • Enable/UVLO Input, Resistor-Programmable UVLO Threshold
  • Adjustable Soft-Start Time
  • MODE Pin to Select Among PWM, PFM, or DCM Modes
  • 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 MAX17505EVKITBE# evaluation kit (EV kit) provides a proven design to evaluate the MAX17505 high-voltage, high-efficiency, synchronous step-down DC-DC converter. The EV kit is preset for 5V output at load currents up to 1.7A and features a 500kHz switching frequency 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 MAX17505 data sheet.

Applications

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

MAX17505EVKITA
Evaluation Kit for the MAX17505 in 3.3V Output-Voltage Application
MAX17505EVKITB
Evaluation Kit for the MAX17505 in 5V Output-Voltage Application
MAX17505EVKITBE
Evaluation Kit for the MAX17505 in 5V Output-Voltage Application

Reference Designs

maxrefdes108fig02
MAXREFDES108 Circuits from the lab

Non-isolated 12V/1A PoE Powered Device Power Supply

Features and Benefits

  • 36V ~ 57V input voltage
  • Compact and flexible
  • Minimal external components
  • Robust operation in adverse environments
  • 12W Output capacity
  • ±3% Output accuracy
MAXREFDES108
Non-isolated 12V/1A PoE Powered Device Power Supply
maxrefdes108fig02
maxrefdes108fig05
maxrefdes108fig06

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