Analog Devices MAX711 Product Info

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

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 (I_SHDN = 0.2µA). Standby control turns off only the step-up converter and leaves the low-power linear regulator active (I_Q = 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.

Applications

• 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