Analog Devices MAX8863 Product Info

• Low Cost
• Low, 55mV Dropout Voltage at 50mA I_OUT
• Low, 68µA No-Load Supply Current
  Low, 80µA Operating Supply Current (even in dropout)
• Low, 350µV_RMS Output Noise
• Miniature External Components
• Thermal Overload Protection
• Output Current Limit
• Reverse Battery Protection
• Dual Mode Operation: Fixed or Adjustable (1.25V to 6.5V) Output
• Low-Power Shutdown

The MAX8863T/S/R and MAX8864T/S/R low-dropout linear regulators operate from a +2.5V to +6.5V input range and deliver up to 120mA. A PMOS pass transistor allows the low, 80µA supply current to remain independent of load, making these devices ideal for battery-operated portable equipment such as cellular phones, cordless phones, and modems.

The devices feature Dual Mode^™ operation: their output voltage is preset (at 3.15V for the T versions, 2.84V for the S versions, or 2.80V for the R versions) or can be adjusted with an external resistor divider. Other features include low-power shutdown, short-circuit protection, thermal shutdown protection, and reverse battery protection. The MAX8864 also includes an auto-discharge function, which actively discharges the output voltage to ground when the device is placed in shutdown mode. Both devices come in a miniature 5-pin SOT23 package.

Applications

• Cellular Telephones
• Cordless Telephones
• Electronic Planners
• Hand-Held Instruments
• Modems
• Palmtop Computers
• PCMCIA Cards
• PCS Telephones