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MAX710, MAX711
3.3V/5V or Adjustable, Step-Up Step-Down DC-DC Converters

Compact, Low-Noise, Transformerless Step-Up/Down Regulator with Single Small Inductor Has Low Output Ripple


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Description
FULL DATA SHEET (PDF, 152kB)
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The MAX710/MAX711 integrate a step-up DC-DC converter with a linear regulator to provide step-up/down voltage conversion. They are optimized for battery applications where the input varies above and below the regulated output voltage. They have an input range from +1.8V to +11V. Typical efficiency when boosting battery inputs is 85%.

The MAX710/MAX711 can be configured for minimum noise or optimum efficiency. Shutdown control turns off the part completely, disconnecting the input from the output (ISHDN = 0.2µA). Standby control turns off only the step-up converter and leaves the low-power linear regulator active (IQ = 7µA).

The MAX710 has a preset 3.3V or 5V output voltage. The MAX711 has an adjustable output that can be set from +2.7V to +5.5V with two resistors. Both devices come in 16-pin narrow SO packages.

Key Features   Applications/Uses
  • Step-Up/Down Voltage Conversion
  • +1.8V to +11V Input Range
  • Output:
    • 5V/250mA at VIN = 1.8V
    • 5V/500mA at VIN = 3.6V
  • No External FETs Required
  • Load Disconnected from Input in Shutdown
  • Battery Drain:
    • 200µA No-Load (VIN = 4V)
    • 7µA in Standby
    • 0.2µA when Off
  • Low-Noise and High-Efficiency Modes

 
  • 2- to 4-Cell AA Alkaline Handheld Equipment
  • 2-, 3-, and 4-Cell Battery-Powered Equipment
  • 3.3V and Other Low-Voltage Systems
  • Battery-Powered Devices with AC Input Adapters
  • Digital Still Cameras
  • Single-Cell, Lithium-Powered Portable Devices

    Key Specifications:   Switch-Mode DC-DC Power Supplies
    Part Number Topology VIN (min) (V) VIN (max) (V) Number of DC-DC Outputs Preset VOUT (V) Digital/VID Programmed Output Min. Adjustable VOUT (V) Max. Adjustable VOUT (V) IOUT (A) Operating Current, ICC (max) (mA) Operating Freq. (kHz) Internal Power Switch(es) Package Price**
    MAX710  Step-Up/Down 1.8 11 1 3.3 No  -   -  0.25 0.14 300 Yes SOIC/16 $2.95 @ 1k
    MAX711   -  2.7 5.5 0.2 $2.95 @ 1k
    See All Switch-Mode DC-DC Power Supplies (429)
    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 prices and delivery, please see the price and availability page or contact an authorized distributor.

    Diagram
    MAX710, MAX711: Typical Operating Circuit
    Typical Operating Circuit

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    Document Ref.: 19-1254; Rev 0; 1997-07-01
    This page last modified: 2007-07-19



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