MAX17673

PRODUCTION

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

Data Sheet (Rev. 2) Product Selection Table
Part Models
2
1ku List Price
Starting From $3.65
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Part Details

  • 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
MAX17673
Integrated 4.5V to 60V Synchronous 1.5A HV Buck and Dual 2.7V to 5.5V, 1A Buck Regulators
MAX17673: Typical Application Circuit
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Documentation

Data Sheet 1

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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

MAX17673EVKIT

Evaluation Kit for the MAX17673 5V, 3.3V, 1.8V Output Applications

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Features and Benefits

  • Three Synchronous DC-DC Buck Converter Outputs from a Single HV input
  • Wide 7V to 60V Input Range for HV Converter
  • Optional External Supply Input connections for LV Converters (4.5V to 5.5V for LVA, and 2.7V to 5.5V for LVB)
  • Programmed 5V/1.5A Output for HV Buck and 3.3V/1A & 1.8V/1A Output for LV Buck Converters
  • 400KHz Switching Frequency for HV Buck and 2MHz Switching Frequency for LV Buck
  • High 93% Efficiency (VINH = 12V, VOUT = 5V at 0.45A) for HV Buck. 94% Efficiency for LV Buck
  • Enable/UVLO Input, Resistor-Programmable UVLO Threshold for HV Buck Converter
  • Programmed 1ms Soft-Start Time for HV Buck Converter, and Internal 4096 Clock Cycles Soft-Start Time for LV Buck Converters
  • Selectable PWM and PFM Modes of Operation
  • Independent Power OK (POK_) Outputs for the Three Converters
  • Overcurrent and Overtemperature Protection
  • Low-Profile, Surface-Mount Components
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX17673EVKIT# evaluation kit (EV kit) provides a proven design to evaluate the MAX17673 60V, 1.5A high efficiency, synchronous buck converter with integrated, dual 5V, 1A buck converters. The EV kit is preset for 5V output at a load current of up to 1.5A from the high voltage (HV) buck converter, and 3.3V and 1.8V outputs at load currents up to 1A each from the low voltage (LV) buck converters. The HV buck converter is programmed to operate at 400kHz, and the LV buck converters are programmed to operate at 2MHz, for optimum efficiency and component sizes. The output of the HV buck converter is connected to the input of the LV buck converters. The EV kit features adjustable input undervoltage lockout and soft-start for the HV buck converter, and Power OK (POK_) signals for all three buck converters. The MAX17673 IC data sheet provides a complete description of the part that should be read in conjunction with this data sheet prior to operating the EV kit.

Applications

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

MAX17673AEVKIT

Evaluation Kit for the MAX17673A 5V, 3.3V, 1.8V Output Applications

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Features and Benefits

  • Three Synchronous DC-DC Buck Converter Outputs from a Single HV Input
  • Wide 7V to 60V Input Range for HV Buck Converter
  • Optional External Supply Input Connections for LV Buck Converters (4.5V to 5.5V for LVA, and 2.7V to 5.5V for LVB)
  • Programmed 5V/1.5A Output for HV Buck Converter and 3.3V/1A and 1.8V/1A Output for LV Buck Converters
  • 400kHz Switching Frequency for HV Buck Converter and 2MHz Switching Frequency for LV Buck Converters
  • High 93% Efficiency (VINH = 12V, VOUT = 5V at 0.45A) for HV Buck Converter; 94% Efficiency (VIN = 5V, VOUT = 3.3V at 0.5A) for LV Buck Converters
  • Enable/UVLO Input, Resistor-Programmable UVLO Threshold for HV Buck Converter
  • Programmed 1ms Soft-Start Time for HV Buck Converter, and Internal 4096 Clock Cycles Soft-Start Time for LV Buck Converters
  • Selectable PWM and PFM Modes of Operation
  • External Clock Synchronization
  • Independent Power-OK (POK_) Outputs for the Three Buck Converters
  • Overcurrent and Overtemperature Protection
  • Low-Profile, Surface-Mount Components
  • Proven PCB Layout
  • Fully Assembled and Tested
  • Complies with CISPR 22 (EN 55022) Class B Conducted and Radiated Emissions Limits

Product Details

The MAX17673AEVKIT# evaluation kit (EV kit) provides a proven design to evaluate the MAX17673A 60V, 1.5A high efficiency, synchronous buck converter with integrated, dual 5.5V, 1A buck converters. The EV kit is preset for 5V output at a load current of up to 1.5A from the highvoltage (HV) buck converter, and 3.3V and 1.8V outputs at load currents up to 1A each from the low-voltage (LV) buck converters. The HV buck converter is programmed to operate at 400kHz, and the LV buck converters are programmed to operate at 2MHz, for optimum efficiency and component sizes. The output of the HV buck converter is connected to the input of the LV buck converters. The EV kit features adjustable input undervoltage lockout and soft-start for the HV buck converter, and power- OK (POK_) signals for all three buck converters. The MAX17673/MAX17673A IC data sheet provides a complete description of the part that should be read in conjunction with this data sheet prior to operating the EV kit.

Applications

  • 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

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