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 cur-
rent. It offers low output noise and low dropout of only
60mV at 100mA. Typical output noise for this device is
32µV
RMS
, 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 volt-
age. Other features include short-circuit protection and
thermal-shutdown protection. The MAX8559 includes
two independent logic-controlled shutdown inputs and
is capable of operating without a bypass capacitor to
further reduce total solution size. The MAX8559 is avail-
able in a miniature 8-bump UCSP™ (2mm x 1mm) or
8-pin TDFN (3mm x 3mm) package.
Applications
Cellular and Cordless Phones
PDAs and Palmtop Computers
Notebook Computers
Digital Cameras
PCMCIA Cards
Wireless LAN Cards
Handheld Instruments
Features
♦ Two Low-Dropout-Voltage Regulators
♦ Low 32µV
RMS
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)
♦ 2mm
2
Footprint (UCSP)
MAX8559
Dual, 300mA, Low-Noise Linear Regulator
with Independent Shutdown in UCSP or TDFN
________________________________________________________________ Maxim Integrated Products 1
Ordering Information