MAX1791

PRODUCTION

High-Efficiency, 10-Pin µMAX, Step-Down Controllers for Notebooks

Data Sheet (Rev. 1) Product Selection Table
Part Models
2
1ku List Price
Starting From $3.84
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Part Details

  • High Operating Frequency (300kHz)
  • No Current-Sense Resistor
  • Accurate Current Limit
  • ±1% Total DC Error over Line and During Continuous Conduction
  • Dual Mode Fixed Output
    • 1.8V/2.5V/adj (MAX1762)
    • 3.3V/5.0V/adj (MAX1791)
  • 0.5V to 5.5V Output Adjust Range
  • 5V to 20V Input Range
  • Automatic Light-Load Pulse Skipping Operation
  • Free-Running On-Demand PWM
  • Foldback Mode™ UVLO
  • PFET/NFET Synchronous Buck
  • 4.65V at 25mA Linear Regulator Output
  • 5µA Shutdown Supply Current
  • 230µA Quiescent Supply Current
  • 10-Pin µMAX Package
MAX1791
High-Efficiency, 10-Pin µMAX, Step-Down Controllers for Notebooks
MAX1762, MAX1791: Typical Operating Circuit
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Documentation

Data Sheet 1

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
External Power Switch Buck Controllers 2
MAX1634
NOT RECOMMENDED FOR NEW DESIGNS Multi Output, Low-Noise Power Supply Controllers for Notebook Computers
MAX1714
PRODUCTION High-Speed Step-Down Controller for Notebook Computers
Multiple Output Buck Regulators 1
MAX1761
PRODUCTION Small, Dual, High-Efficiency Buck Controller for Notebooks
Product 5
MAX1630
Multi Output, Low-Noise Power Supply Controllers for Notebook Computers
MAX1631
NOT RECOMMENDED FOR NEW DESIGNS Multi Output, Low-Noise Power Supply Controllers for Notebook Computers
MAX1632
NOT RECOMMENDED FOR NEW DESIGNS Multi Output, Low-Noise Power Supply Controllers for Notebook Computers
MAX1633
Multi Output, Low-Noise Power Supply Controllers for Notebook Computers
MAX1635
Multi Output, Low-Noise Power Supply Controllers for Notebook Computers
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Evaluation Kits

MAX1791EVKIT

Evaluation Kit for the MAX1791, MAX1762

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Features and Benefits

  • No Current-Sense Resistor
  • +5V to +20V Input Voltage Range
  • 3.3V or 5V Preset Output Voltage (MAX1791)
  • 1.8V or 2.5V Preset Output Voltage (MAX1762)
  • Adjustable Output Voltage (1.25V to 5.5V, External Divider)
  • 2A Output Current
  • 300kHz Switching Frequency
  • 5µA IC Shutdown Current
  • 10-Pin µMAX® Package
  • Low-Profile Components
  • Surface-Mount Construction
  • Fully Assembled and Tested

Product Details

The MAX1791 evaluation kit (EV kit) demonstrates a standard 2A application circuit. This DC-DC converter steps down high-voltage batteries and/or AC adapters, generating a precision, low-voltage rail for use as chipset, I/O, and other low-voltage supplies in notebook computers and PDAs.

The MAX1791 EV kit provides a 3.3V output voltage from a +5V to +20V battery input range. It delivers up to 2A output current with greater than 90% efficiency. The EV kit operates at 300kHz switching frequency and has superior line- and load-transient response.

This EV kit is a fully assembled and tested circuit board. It also allows the evaluation of other output voltages in the 1.25V to 5.5V range by changing feedback resistors R1 and R2. This EV kit can also be used to evaluate the MAX1762 (1.8V or 2.5V output voltage).

Applications

  • 1.8V/2.5V Logic and I/O Supplies
  • Digital Still Cameras
  • Handy Terminals
  • Notebook Computers
  • PDAs
  • Smartphones
  • Subnotebooks
MAX1791EVKIT
Evaluation Kit for the MAX1791, MAX1762

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