19-3048; Rev 2; 10/07
Low-Input-Voltage, 500mA LDO Regulator
RESET
with
in SOT and TDFN
General Description
Features
♦ Low 1.62V Minimum Input Voltage
♦ Guaranteed 500mA Output Current
The MAX1589 low-dropout linear regulator operates
from a +1.62V to +3.6V supply and delivers a guaran-
teed 500mA continuous load current with a low 175mV
dropout. The high-accuracy ( 0.5%) output voltage is
preset to internally trimmed voltages from +0.75V to
+3.0V. An active-low, open-drain reset output remains
asserted for at least 70ms after the output voltage reach-
es regulation. This device is offered in 6-pin thin SOT23
and 6-pin 3mm x 3mm thin DFN packages.
♦
0.5ꢀ Initial Accuracy
♦ Low 175mV Dropout at 500mA Load
♦ 70ms RESET Output Flag
♦ Supply Current Independent of Load and Dropout
Voltage
♦ Logic-Controlled Shutdown
♦ Thermal-Overload and Short-Circuit Protection
♦ Preset Output Voltages (0.75V, 1.0V, 1.2V, 1.3V,
An internal PMOS pass transistor maintains low supply
current, independent of load and dropout voltage, making
the MAX1589 ideal for portable battery-powered equip-
ment such as personal digital assistants (PDAs), digital
still cameras, cell phones, cordless phones, and note-
book computers. Other features include logic-controlled
shutdown, short-circuit protection, and thermal-
overload protection.
1.5V, 1.8V, 2.5V, and 3.0V)
♦ Tiny 6-Pin Thin SOT23 Package (<1.1mm High)
♦ Thin 6-Pin TDFN Package (<0.8mm High)
Ordering Information
PART*
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
6 Thin SOT23-6
6 TDFN
MAX1589EZT_ _ _-T
MAX1589ETT_ _ _
*Insert the desired three-digit suffix (see the Selector Guide) into
the blanks to complete the part number. Contact the factory for
other output voltages.
Applications
Selector Guide
Notebook Computers
Cellular and PCS Telephones
Personal Digital Assistants (PDAs)
Hand-Held Computers
Digital Still Cameras
TOP MARK
V
OUT
(V)
SUFFIX
SOT
AAAT
AAAU
—
TDFN
AFJ
0.75
1.00
1.20
1.30
1.50
1.80
2.50
3.00
075
100
120
130
150
180
250
300
AFK
ATM
AFL
PCMCIA Cards
AAAV
AAAW
AAAX
AAAY
AAAZ
CD and MP3 Players
AFM
AFN
AFO
AFP
Typical Operating Circuit
Pin Configurations
TOP VIEW
INPUT
1.62V TO 3.6V
OUTPUT
0.75V TO 3.0V
500mA
IN
OUT
C
1μF
C
OUT
4.7μF
IN
1
2
3
6
5
4
IN
GND
OUT
I.C.
OUT
I.C.
1
2
3
6
5
4
IN
LOGIC
SUPPLY
MAX1589
SHDN
GND
MAX1589
MAX1589
100kΩ
RESET
ON
SHDN
TO μC
RESET
SHDN
RESET
OFF
TDFN
3mm x 3mm
GND
THIN SOT23
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.