MAX8878 Datasheet

• Pin-Compatible with the Industry-Standard '2982
• Low Output Noise: 30µV_RMS
• Low 55mV Dropout at 50mA Output (165mV at 150mA output)
• Low 85µA No-Load Supply Current
• Low 100µA Operating Supply Current (even in dropout)
• Thermal-Overload and Short-Circuit Protection
• Reverse Battery Protection
• Output Current Limit
• Preset Output Voltages (±1.4% Accuracy)
• 10nA Logic-Controlled Shutdown

• Audio Systems
• Cordless Phones
• Electronic Planners
• Handheld Instruments (PDAs, Palmtops)
• Modems
• Palmtop Computers
• PCMCIA Cards
• PCS Telephones

The MAX8878 low-noise, low-dropout linear regulators operate from a 2.5V to 6.5V input and deliver up to 150mA. These devices are pin-compatible with the industry-standard '2982 and offer an improved dropout voltage. Typical output noise is 30µV_RMS, and typical dropout is only 165mV at 150mA. The output voltage is preset to voltages in the range of 1.5V to 5.0V, in 100mV increments.

Designed with an internal P-channel MOSFET pass transistor, the MAX8878 maintain a low 100µA supply current, independent of the load current and dropout voltage. Other features include a 10nA logic-controlled shutdown mode, short-circuit and thermal-shutdown protection, and reverse battery protection. The MAX8878 also includes an auto-discharge function, which actively discharges the output voltage to ground when the device is placed in shutdown. The MAX8878 come in regular and thin 5-pin SOT23 package.