Analog Devices MAX8940 Product Info

• Space-Saving SC70
• 25µV_RMS Output Noise at 100Hz to 100kHz Bandwidth
• 65dB PSRR at 10kHz
• 120mV Dropout at 120mA Load
• Stable with 1µF Ceramic Capacitor for Any Load
• Guaranteed 120mA Output
• Output Voltages: 2.8V or 3V
• Low 40µA Ground Current
• Excellent Load/Line Transient
• Overcurrent and Thermal Protection

The MAX8940 low-noise, low-dropout (LDO) linear regulator is designed to deliver up to 120mA continuous output current. This regulator achieves a low 120mV dropout for 120mA load current. The MAX8940 uses an advanced architecture to achieve low output voltage noise of 25µV_RMS and PSRR of 45dB at 100kHz.

The MAX8940 is preset to either 2.8V or 3.0V. Designed with a p-channel MOSFET series pass transistor, the MAX8940 maintain very low ground current (40µA).

The regulator is designed and optimized to work with low-value, low-cost ceramic capacitors. The MAX8940 requires only 1µF (typ) of output capacitance for stability with any load. When disabled, current consumption drops to below 1µA.

Package is a 5-pin SC70.

Applications

• Base Stations
• Bluetooth Portable Radios and Accessories
• Cellular and Cordless Phones
• Digital Cameras
• PDA and Palmtop Computers
• Personal Stereos
• Portable and Battery-Powered Equipment
• Wireless LANs