MAX17673, MAX17673A

Integrated 4.5V to 60V Synchronous 1.5A HV Buck and Dual 2.7V to 5.5V, 1A Buck Regulators

Industry's First 60V Capable, Multi-Output PMIC


Please check latest availability status for a specific part variant.

Description

MAX17673 Samples

MAX17673/MAX17673A power management integrated circuits (PMIC) integrate a 60V high voltage (HV), high efficiency synchronous DC-DC buck regulator and two 5.5V high efficiency synchronous DC-DC buck regulators. All three regulators offer integrated power MOSFETs.

The HV regulator operates from a 4.5V to 60V input voltage range and the LV regulators operate from a 2.7V to 5.5V input voltage range. The HV regulator supports load currents up to 1.5A, and can regulate output voltages from 0.9V to 5.5V. The LV regulators support load currents up to 1A, and can regulate output voltages from 0.75V to 4.8V.

MAX17673/MAX17673A offer independent peak current mode control, hiccup mode overcurrent protection, ENABLE input and Power OK signal in the three regulators. The switching frequency is adjustable between 1MHz and 4MHz in the LV regulators, and the HV regulator can be programmed to run at a fractional switching frequency of the LV regulators. The HV regulator offers an adjustable soft-start function, while the LV regulators present internally fixed soft-start. Users can choose to operate the devices in either pulse frequency modulation (PFM) or forced pulse width modulation (PWM) scheme.

The devices are available in a 28-pin, 5mm x 5mm TQFN package and operates over a -40°C to +125°C temperature range.

MAX17673: Typical Application Circuit MAX17673: Typical Application Circuit Enlarge+

Key Features

  • Reduces External Components and Total Cost
    • Synchronous Operation for High Efficiency
    • Internal Compensation for a Wide Output Voltage Range
    • All-Ceramic Capacitors,Compact Layout
  • Integrates Three DC-DC Regulators
    • Wide 4.5V to 60V Input Voltage Range for the HV Regulator. 2.7V to 5.5V Input Range for LV Regulators.
    • Adjustable 0.9V to 5.5V Output for the HV Regulator and 0.75V up to 4.8V Output for LV Regulators
    • Delivers up to 1.5A Load Current for the HV Regulator and 1A Load Current for LV Regulators
    • Adjustable Switching Frequency: 250KHz to 800KHz for HV Regulator and 1MHz to 4MHz for LV Regulators
    • Programmable LV / HV Switching Frequency Ratio (2, 3, 4, 5, 6, 7, 8)
    • EN/UVLO for HV buck and EN for LV regulators
  • Reduces Power Dissipation
    • 550μA in PFM and 10.2mA in PWM Mode Quiescent Current
    • Peak Efficiency > 92%
    • Auxiliary Bootstrap LDO for Improved Efficiency
    • PFM Mode for High Light-Load Efficiency
    • 7.4µA Shutdown Current
  • Operates Reliably in Adverse Industrial Environments
    • Peak-Current Limit Protection
    • Hiccup Mode Overload Protection
    • Soft-Start Reduces Inrush Current During Startup (Adjustable for HV Regulator)
    • Built-In Output-Voltage Monitoring with POKH, POKA, and POKB
    • Monotonic Startup into Prebiased Load
    • Overtemperature Protection
    • Dynamic Mode Change for On-the-Fly Shift Between PFM and PWM Mode
    • -40°C to +125°C Operating Temperature Range
    • Complies with CISPR22(EN55022) Class B Conducted and Radiated Emissions

Applications/Uses

  • Base Station Power Supplies
  • Distributed Supply Regulation
  • FPGA/CPLD Power Supplies
  • High Voltage Single Board Systems
  • Industrial Control Power Supplies

MAX17673EVKIT: Evaluation Kit for the MAX17673 5V, 3.3V, 1.8V Output Applications
MAX17673AEVKIT: Evaluation Kit for the MAX17673A 5V, 3.3V, 1.8V Output Applications

Tools & Models

  • EE-Sim: Design & Simulate MAX17673A
  • EE-Sim: Design & Simulate MAX17673
  • Request Reliability Report for: MAX17673  MAX17673A 
    Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >

     
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    Type ID Title
    Evaluation Board10561MAX17673AEVKIT Evaluation Kit for the MAX17673A 5V, 3.3V, 1.8V Output Applications
    Evaluation Board10092MAX17673EVKIT Evaluation Kit for the MAX17673 5V, 3.3V, 1.8V Output Applications