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

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)

Low-Input-Voltage, 500mA LDO Regulator

with

R

RE

ES

SE

ET

________________________________________________________________ Maxim Integrated Products

1

GND

OUT

IN

TOP VIEW

MAX1589

SHDN

GND

THIN SOT23

I.C.

RESET

RESET

1

2

3

6

5

4

4

5

6

SHDN

IN

3

2

1

I.C.

OUT

TDFN

3mm x 3mm

MAX1589

Pin Configurations

ON

OFF

INPUT

1.62V TO 3.6V

IN

SHDN

GND

RESET

OUT

OUTPUT

0.75V TO 3.0V

500mA

TO

μC

LOGIC

SUPPLY

100k

Ω

MAX1589

1

μF

4.7

μF

Typical Operating Circuit

19-3048; Rev 2; 10/07

*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

TOP MARK

(V)

SUFFIX

SOT

TDFN

0.75

075

AAAT

AFJ

1.00

100

AAAU

AFK

1.20

120

—

ATM

1.30

130

AAAV

AFL

1.50

150

AAAW

AFM

1.80

180

AAAX

AFN

2.50

250

AAAY

AFO

3.00

300

AAAZ

AFP

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

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.