MAX8559 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – Dual, 300mA, Low-Noise Linear Regulator with Independent Shutdown in UCSP or TDFN

19-3121; Rev 0; 1/04
EVAALVUAAILTAIOBNLEKIT
Dual, 300mA, Low-Noise Linear Regulator
with Independent Shutdown in UCSP or TDFN
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
Hand-Held 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)
♦ 2mm² Footprint (UCSP)
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX8559EBAxy*† -40°C to +85°C
8 UCSP (B8-1)
MAX8559ETAxy*
-40°C to +85°C
8 TDFN-EP**
*xy = Output voltage code (see the Output Voltage
Selector Guide).
**EP = Exposed pad.
†Future product—contact factory for availability.
Typical Operating Circuit
Pin Configurations
INPUT
2.5V TO 6.5V
2.2µF
min
ON
OFF
ON
OFF
INA
OUTA
INB
SHDNA ^{MAX8559 OUTB}
SHDNB
BP
GND
1.5V TO 3.3V
2.2µF/150mA
4.7µF/300mA
1.5V TO 3.3V
2.2µF/150mA
4.7µF/300mA
0.01µF
(OPTIONAL)
TOP VIEW
8 7 65
MAX8559ETA
1 2 34
TDFN
3mm x 3mm
Pin Configurations continued at end of data sheet.
Output Voltage Selector Guide appears at end of data sheet.
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