MAX1589_07 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – Low-Input-Voltage, 500mA LDO Regulator with RESETin SOT and TDFN

19-3048; Rev 2; 10/07
Low-Input-Voltage, 500mA LDO Regulator
with RESET in SOT and TDFN
General Description
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.
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.
Applications
Notebook Computers
Cellular and PCS Telephones
Personal Digital Assistants (PDAs)
Hand-Held Computers
Digital Still Cameras
PCMCIA Cards
CD and MP3 Players
Typical Operating Circuit
INPUT
1.62V TO 3.6V
IN
C_IN
1μF
OUT
MAX1589
ON
OFF
SHDN
RESET
GND
OUTPUT
500mA 0.75V TO 3.0V
C_OUT
4.7μF
LOGIC
SUPPLY
100kΩ
TO μC
Features
♦ Low 1.62V Minimum Input Voltage
♦ Guaranteed 500mA Output Current
♦ ±0.5% 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,
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 PIN-PACKAGE
MAX1589EZT_ _ _-T -40°C to +85°C 6 Thin SOT23-6
MAX1589ETT_ _ _
-40°C to +85°C 6 TDFN
*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.
Selector Guide
V_OUT
(V)
0.75
1.00
1.20
1.30
1.50
1.80
2.50
3.00
SUFFIX
075
100
120
130
150
180
250
300
TOP MARK
SOT
TDFN
AAAT
AFJ
AAAU
AFK
—
ATM
AAAV
AFL
AAAW
AFM
AAAX
AFN
AAAY
AFO
AAAZ
AFP
Pin Configurations
TOP VIEW
IN 1
6 OUT _{OUT 1}
6 IN
GND 2
MAX1589
5 I.C.
I.C. 2
RESET 3
MAX1589
5 SHDN
4 GND
SHDN 3
4 RESET
THIN SOT23
TDFN
3mm x 3mm
________________________________________________________________ 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.