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MAX8864R, MAX8864S, MAX8864T：Low-Dropout, 120mA Linear Regulators

SOT23 Low-Noise, Low-Dropout Regulator

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.

Key Features Low Cost Low, 55mV Dropout Voltage at 50mA IOUT Low, 68µA No-Load Supply Current Low, 80µA Operating Supply Current (even in dropout)  Low, 350µVRMS 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

MAX8863R, MAX8863S, MAX8863T, MAX8864R, MAX8864S, MAX8864T: Functional Diagram Applications/Uses Cellular Telephones Cordless Telephones Electronic Planners Hand-Held Instruments Modems Palmtop Computers PCMCIA Cards PCS Telephones

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