General Description

The MAX8559 dual, low-noise, low-dropout (LDO) linear regulator operates from a 2.5V to 6.5V input voltage and delivers at least 300mA of continuous output current. It offers low output noise and low dropout of only 60mV at 100mA. Typical output noise for this device is 32μVRMS, and PSRR is 70dB at 10kHz. Designed with an internal P-channel MOSFET pass transistor, the MAX8559 maintains a low 115μA supply current per LDO, independent of the load current and dropout voltage.

Features

? Two Low-Dropout-Voltage Regulators

? Low 32μVRMS Output Noise

? 300mA Output Current for Each LDO

? 70dB PSRR at 10kHz

? Independent Shutdown Controls

? Low 60mV Dropout at 100mA Load

? 115μA Operating Supply Current per LDO

? 1.5V to 3.3V Factory-Preset Output

? Small Ceramic Output Capacitors

? Output Current Limit

? Thermal-Overload and Short-Circuit Protection

? 1.95W Power-Dissipation Capability (TDFN)

? 2mm2 Footprint (UCSP)

Applications

?? Cellular and Cordless Phones

?? PDAs and Palmtop Computers

?? Notebook Computers

?? Digital Cameras

?? PCMCIA Cards

?? Wireless LAN Cards

?? Handheld Instruments