MAX1709

4A, Low-Noise, High-Frequency, Step-Up DC-DC Converter

3V to 5V Step-Up DC-DC, Delivers 4A with Internal Switch


Please check latest availability status for a specific part variant.

Description

The MAX1709 sets a new standard of space savings for high-power, step-up DC-DC conversion. It delivers up to 20W at a fixed (3.3V or 5V) or adjustable (2.5V to 5.5V) output, using an on-chip power MOSFET from a +0.7V to +5V supply.

Fixed-frequency PWM operation ensures that the switching noise spectrum is constrained to the 600kHz fundamental and its harmonics, allowing easy postfiltering for noise reduction. External clock synchronization capability allows for even tighter noise spectrum control. Quiescent power consumption is less than 1mW to extend operating time in battery-powered systems.

Two control inputs (ONA, active-low ONB) allow simple push-on, push-off control through a single momentary pushbutton switch, as well as conventional on/off logic control. The MAX1709 also features programmable soft-start and current limit for design flexibility and optimum performance with batteries.

The MAX1709 is supplied in both a high-power TSSOP package, which allows a 10ARMS switch current and a 4A output, and a narrow SO package, which supplies a 2.4A output with a switch rated at 6ARMS. Although the narrow SO device has a lower RMS switch rating, it has the same peak switch current rating as the TSSOP device, and so can supply 4A loads intermittently. If loads of 2A or less are required, refer to the MAX1708.
MAX1709: Typical Operating Circuit MAX1709: Typical Operating Circuit Enlarge+

Key Features

  • Integration Reduces External Component Count to Save Space
    • On-Chip 10A Power MOSFET
    • 5V, 4A Output from a 3.3V Input
    • Fixed 3.3V or 5V Output Voltage or Adjustable (2.5V to 5.5V)
    • Input Voltage Range Down to 0.7V
  • ConstantFrequencyReducesPost-Filtering
    • Low-Noise, Constant-Frequency Operation (600kHz)
    • Synchronizable Switching Frequency (350kHz to 1000kHz)
  • Lower Power Consumption Extends Battery Life
    • 1mW Quiescent Power

Applications/Uses

  • 3.6V or 5V RF PAs in Communications Handsets
  • Local 2.5V to 3.3V or 5V Conversion
  • Local 3.3V to 5V Conversion
  • Routers, Servers, Workstations, Card Racks
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
IOUT1
(A)
Output Adjust. MethodSwitch TypeICC
(mA)
DC-DC OutputsOper. Freq.
(kHz)
Package/PinsBudgetary
Price
minmaxminmaxtypSee Notes
MAX1709 0.752.55.5
3.3
5
4
Preset
Resistor
Internal0.21600
SOIC (N)/16
TSSOP/28
$4.71 @1k
See All Step-Up Switching Regulators (98)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX1709EVKIT: Evaluation Kit for the MAX1709

Technical Documents

App Note 3741 Analog ICs for Low Voltage Systems

Quality and Environmental Data

Product Reliability Reports: MAX1709.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX17094ETM+
  • MAX17094ETM+T
  • MAX1709ESE
  • MAX1709ESE+
  • MAX1709ESE+T
  • MAX1709ESE-T
  • MAX1709EUI
  • MAX1709EUI+
  • MAX1709EUI+T
  • MAX1709EUI-T
  • MAX1709EUI/GG8
  • MAX1709EUI/GG8-T
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    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 >

     
    Status:
    Package:
    Temperature:

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