_______________General Description

The MAX8863T/S/R and MAX8864T/S/R low-dropout lin-

ear regulators operate from a +2.5V to +6.5V input

range and deliver up to 120mA. A PMOS pass transis-

tor allows the low, 80µA supply current to remain inde-

pendent of load, making these devices ideal for

battery-operated portable equipment such as cellular

phones, cordless phones, and modems.

The devices feature Dual Mode™ operation: their out-

put voltage is preset (at 3.15V for the T versions, 2.84V

for the S versions, or 2.80V for the R versions) or can be

adjusted with an external resistor divider. Other fea-

tures include low-power shutdown, short-circuit protec-

tion, thermal shutdown protection, and reverse battery

protection. The MAX8864 also includes an auto-dis-

charge function, which actively discharges the output

voltage to ground when the device is placed in shut-

down mode. Both devices come in a miniature 5-pin

SOT23-5 package.

________________________Applications

Cordless Telephones

Modems

PCS Telephones

Hand-Held Instruments

Cellular Telephones

Palmtop Computers

PCMCIA Cards

Electronic Planners

____________________________Features

o Low Cost

o Low, 68µA No-Load Supply Current

Low, 80µA Operating Supply Current (even in

dropout)

o Miniature External Components

o Thermal Overload Protection

o Output Current Limit

o Reverse Battery Protection

o Dual Mode™ Operation: Fixed or Adjustable

(1.25V to 6.5V) Output

o Low-Power Shutdown

Low-Dropout, 120mA Linear Regulators

________________________________________________________________

Maxim Integrated Products

1

SOT23-5

TOP VIEW

GND

OUT

IN

1

5

SET

SHDN

MAX8863

MAX8864

2

3

4

__________________Pin Configuration

MAX8863

MAX8864

OUT

GND

SET

IN

SHDN

1µF

1µF

BATTERY

OUTPUT

VOLTAGE

__________Typical Operating Circuit

19-0466; Rev 2; 11/98

PART

MAX8863TEUK-T

MAX8863SEUK-T

MAX8864TEUK-T

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

TEMP. RANGE

PIN-

PACKAGE

5 SOT23-5

5 SOT23-5

5 SOT23-5

______________Ordering Information

SOT TOP

MARK*

AABE

AABF

AABG

MAX8864SEUK-T

-40°C to +85°C

5 SOT23-5

AABH

Dual Mode is a trademark of Maxim Integrated Products.

MAX8863REUK-T

-40°C to +85°C

5 SOT23-5

AABV

MAX8864REUK-T

-40°C to +85°C

5 SOT23-5

AABW

*

Alternate marking information: CY_ _ = MAX8863T,

CZ_ _ = MAX8863S, DA_ _ = MAX8864T, DB_ _ = MAX8864S

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.