MAX629

28V, Low-Power, High-Voltage, Boost or Inverting DC-DC Converter


Please check latest availability status for a specific part variant.

Description

The MAX629 low-power DC-DC converter features an internal N-channel MOSFET switch and programmable current limiting. It is designed to supply positive or negative bias voltages up to ±28V from input voltages in the 0.8V to VOUT range, and can be configured for boost, flyback, and SEPIC topologies.

The MAX629's current-limited pulse-frequency-modulation (PFM) control scheme provides high efficiency over a wide range of load conditions. An internal, 0.5A N-channel MOSFET switch reduces the total part count, and a high switching frequency (up to 300kHz) allows for tiny surface-mount magnetics.

The MAX629's combination of low supply current, logic-controlled shutdown, small package, and tiny external components makes it an extremely compact and efficient high-voltage biasing solution that's ideal for battery-powered applications. The MAX629 is available in an 8-pin SO package.

Key Features

  • Internal, 500mA, 28V N-Channel Switch (No External FET Required)
  • Generates Positive or Negative Output Voltages
  • 80µA Supply Current
  • 1µA Max Shutdown Current
  • Up to 300kHz Switching Frequency
  • Adjustable Current Limit Allows Use of Small, Inexpensive Inductors
  • 8-Pin SO Package

Applications/Uses

  • 2-Cell and 3-Cell Battery-Powered Applications
  • High-Efficiency DC-DC Boost Converters
  • Palmtop Computers
  • Positive or Negative LCD Bias Generators
  • Varactor Tuning Diode Bias
Part NumberVIN
(V)
VIN
(V)
IOUT1
(A)
Output Adjust. MethodDC-DC OutputsAlternate TopologyOper. Freq.
(kHz)
Switch TypePackage/PinsBudgetary
Price
minmaxSee Notes
MAX629 2.75.50.5Resistor1
Inverting
Step-Up
300Internal
See Data Sheet
$3.34 @1k
See All Inverting Switching Regulators (22)

Part NumberICC
(mA)
Shutdown Mode Supply Current
(µA)
Shutdown Mode Supply Current
(µA)
Package/Pins
typtypmax
MAX629 0.080.041
SOIC (N)/8
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.


MAX629EVKIT: Evaluation Kit for the MAX629

Technical Documents

App Note 3467 SMBus I/O Expander Controls LCD Bias Voltage
Tutorial 817 Using Thermistors in Temperature Tracking Power Supplies

Quality and Environmental Data

Product Reliability Reports: MAX629.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX629ESA+
  • MAX629ESA+G071
  • MAX629ESA+T
  • MAX629ESA+TG071
  • 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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