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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Status Explanations for product status codes

Active: In Production.

Description

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.

Data Sheet

Download this datasheet in PDF formatDownload Rev 0 (PDF, 152kB)
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An evaluation board is available: MAX710EVKIT

Key Features

  • 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
 

Applications/Uses

  • 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
   

Diagram

MAX710, MAX711: Typical Operating Circuit
Typical Operating Circuit

Notes and Comments

Inductor size Smaller than SEPIC or Flyback

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Information Index

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