MAX17551

PRODUCTION

60V, 50mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converter with 22μA No-Load Supply Current

60V, Low IQ Synchronous Buck Regulator Enables High Efficiency

Data Sheet (Rev. 3) Product Selection Table
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Overview

  • Reduces External Components and Total Cost
    • No Schottky–Synchronous
    • Internal Compensation for Any Output Voltage
    • Built-In Soft-Start
    • All-ceramic capacitors, Compact Layout
  • Reduces Number of DC-DC Regulators to Stock
    • Wide 4V to 60V Input
    • Adjustable 0.8V to 0.9 x VIN Output
    • 100kHz to 2.2MHz Adjustable Switching Frequency with External Synchronization
  • Reduces Power Dissipation
    • 22µA Quiescent Current
    • Peak Efficiency > 90%
    • PFM Enables Enhanced Light-Load Efficiency
    • 1.2µA Shutdown Current
  • Operates Reliable in Adverse Environments
    • Peak Current Limit Protection
    • Built-In Output Voltage Monitoring Active-Low RESET
    • Programmable EN/UVLO Threshold
    • Monotonic Startup in to Prebiased Load
    • Overtemperature Protection
    • Overtemperature Protection • High Industrial -40°C to +125°C Ambient Operating Temperature Range / -40°C to +150°C Junction Temperature Range
MAX17551
60V, 50mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converter with 22μA No-Load Supply Current
MAX17551: Typical Application Circuit
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Documentation

Data Sheet 1

User Guide 1

Technical Articles 2

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Switching Regulators & Controllers 2
MAX17552
PRODUCTION 60V, 100mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converter with 22μA No-Load Supply Current
MAX15062
PRODUCTION 60V, 300mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converters
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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • MAX17551

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

MAX17551AUBEVKIT

Evaluation Kit (µMAX) for MAX17551

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Features and Benefits

  • 6V to 60V Input Voltage Range
  • 5V Output, 50mA Continuous Current
  • 26µA No-Load Supply Current
  • EN/UVLO for On/Off Control and Programmable Input Undervoltage Lockout
  • Programmable Switching Frequency
  • Internal or Programmable Soft-Start
  • PFM or Forced-PWM Mode of Operation
  • Open-Drain Active-Low RESET Output
  • Peak Current-Limit Protection
  • Thermal Shutdown
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX17551 5V evaluation kit (EV kit) (µMAX) is a fully assembled and tested circuit board that demonstrates the performance of the MAX17551 60V, 50mA ultra-small, high-efficiency, synchronous step-down DC-DC converter in a 10-pin µMAX package. The EV kit operates over a wide input voltage range of 6V to 60V and provides up to 50mA load current at 5V output. It draws only 26µA supply current under no-load conditions (EN/UVLO connected to VIN). The EV kit is programmed to switch at a frequency of 300kHz. The device is simple to use and easily configurable with minimal external components. It features cycle-by-cycle peak current-limit protection, undervoltage lockout, and thermal shutdown.

The EV kit comes installed with the MAX17551AUB+ in a 10-pin (3mm x 3mm) lead(Pb)-free/RoHS-compliant µMAX package.

Applications

  • Battery-Powered Equipment
  • High-Voltage LDO Replacement
  • HVAC and Building Control
  • Industrial Sensors and Process Control

MAX17551ATBEVKIT

Evaluation Kit (TDFN) for MAX17551

Buy Now View Details

Features and Benefits

  • 6V to 60V Input Voltage Range
  • 5V Output, 50mA Continuous Current
  • 26µA No-Load Supply Current
  • EN/UVLO for On/Off Control and Programmable Input Undervoltage Lockout
  • Programmable Switching Frequency
  • Internal or Programmable Soft-Start
  • PFM or Forced-PWM Mode of Operation
  • Open-Drain Active-Low RESET Output
  • Peak Current-Limit Protection
  • Thermal Shutdown
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX17551 5V evaluation kit (EV kit) (TDFN) is a fully assembled and tested circuit board that demonstrates the performance of the MAX17551 60V, 50mA ultra-small, high-efficiency, synchronous step-down DC-DC converter in a 10-pin TDFN package. The EV kit operates over a wide input voltage range of 6V to 60V and provides up to 50mA load current at 5V output. It draws only 26µA supply current under no-load conditions (EN/UVLO connected to VIN). The EV kit is programmed to switch at a frequency of 300kHz. The device is simple to use and easily configurable with minimal external components. It features cycle-by-cycle peak current-limit protection, undervoltage lockout, and thermal shutdown.

The EV kit comes installed with the MAX17551ATB+ in a 10-pin (3mm x 2mm) lead(Pb)-free/RoHS-compliant TDFN package.

Applications

  • Battery-Powered Equipment
  • High-Voltage LDO Replacement
  • HVAC and Building Control
  • Industrial Sensors and Process Control
MAX17551AUBEVKIT
Evaluation Kit (µMAX) for MAX17551
MAX17551ATBEVKIT
Evaluation Kit (TDFN) for MAX17551

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