General Description

The MAX8887/MAX8888 low-dropout linear regulators

operate from a 2.5V to 5.5V input and deliver up to

300mA continuous (500mA pulsed) current. The

MAX8887 is optimized for low-noise operation, while the

MAX8888 includes an open-drain power-OK (POK) ouput

flag. Both regulators feature exceptionally low 100mV

dropout at 200mA. These devices are available in a vari-

ety of preset output voltages in the 1.5V to 3.3V range.

An internal PMOS pass transistor allows the low 55µA

supply current to remain independent of load, making

these devices ideal for portable battery-powered equip-

ment such as personal digital assistants (PDAs), cellu-

lar phones, cordless phones, and notebook computers.

Other features include a micropower shutdown mode,

short-circuit protection, thermal shutdown protection,

and an active-low open-drain POK output that indicates

when

the

output

is

out

of

regulation.

The

MAX8887/MAX8888 are available in a thin 5-pin SOT23

package that is only 1mm high.

________________________Applications

Notebook Computers

Wireless Handsets

PDAs and Palmtop Computers

Digital Cameras

PCMCIA Cards

Hand-Held Instruments

Features

♦ Guaranteed 300mA Output Current (500mA for

Pulsed Loads)

♦ Low 100mV Dropout at 200mA Load

♦ POK Output (MAX8888)

♦ Preset Output Voltages (1.5V, 1.8V, 2.85V, and

3.3V)

♦ 55µA No-Load Supply Current

♦ Thermal-Overload and Short-Circuit Protection

♦ Foldback Output Current-Limit Protection

♦ 60dB PSRR at 1kHz

♦ 0.1µA Shutdown Current

♦ Thin 5-Pin SOT23 Package, 1mm High

Low-Dropout, 300mA Linear Regulators in SOT23

________________________________________________________________

Maxim Integrated Products

1

GND

BP

SHDN

15

OUT

IN

MAX8887

TOP VIEW

2

34

GND

POK

SHDN

15

OUT

IN

MAX8888

2

34

Pin Configurations

MAX8887

MAX8888

ON

OFF

INPUT

2.5V TO 5.5V

IN

SHDN

GND

(BP)

POK

OUT

300mA

2.2µF

2.2µF

0.01µF

( ) ARE FOR MAX8887 ONLY.

Typical Operating Circuit

19-1859; Rev 4; 7/09

Ordering Information

PART

TEMP

RANGE

PIN-

PACKAGE

TOP

MARK

MAX8887EZK15+T

-40°C to +85°C 5 SOT23

ADQD

MAX8887EZK18+T

-40°C to +85°C 5 SOT23

ADPX

MAX8887EZK29+T

-40°C to +85°C 5 SOT23

ADPY

MAX8887EZK33+T

-40°C to +85°C 5 SOT23

ADPZ

MAX8887EZKxy+T*

-40°C to +85°C 5 SOT23

—

MAX8888EZK15+T

-40°C to +85°C 5 SOT23

ADQE

MAX8888EZK18+T

-40°C to +85°C 5 SOT23

ADQA

MAX8888EZK18/V+T

-40°C to +85°C 5 SOT23

—

MAX8888EZK29+T

-40°C to +85°C 5 SOT23

ADQB

MAX8888EZK33+T

-40°C to +85°C 5 SOT23

ADQC

MAX8888EZKxy+T*

-40°C to +85°C 5 SOT23

—

*

Other versions (xy) between +1.5 and +3.3V are available in

100mV increments. Contact factory for other versions. Minimum

order quantity is 25,000 units.

+

Denotes a lead(Pb)-free RoHS-compliant package.

/V denotes an automotive qualified port.

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.