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.

General Description

The MAX8880/MAX8881 are ultra-low supply current,

low-dropout linear regulators, capable of delivering up

to 200mA. They are designed for battery-powered

applications where reverse battery protection and long

battery life are critical.

These regulators’ low 3.5µA supply current extends bat-

tery life in applications with long standby periods. Unlike

PNP-based designs, a 2

Ω PMOS device maintains ultra-

low supply current throughout the entire operating range

and in dropout. The parts are internally protected from

output short circuits, reverse battery connection, and

thermal overload. An internal power-OK (POK) com-

parator indicates when the output is out of regulation.

The MAX8880 output is adjustable from 1.25V to 5V

using an external resistor-divider. The MAX8881 pro-

vides only factory-preset output voltages of 1.8V, 2.5V,

3.3V, or 5V (see Ordering Information). The devices are

available in 6-pin SOT23 and 6-pin TDFN packages.

Features

♦ 3.5µA Supply Current at 12V

♦ Reverse Battery Protection

♦ 2.5V to 12V Input Voltage Range

♦ ±1.5% Output Voltage Accuracy

♦ 200mA max Output Current

♦ 2Ω PMOS Output Device

♦ Short-Circuit and Thermal Overload Protection

♦ POK Output for Out-of-Regulation Indicator

♦ Fixed 1.8V, 2.5V, 3.3V, and 5V (MAX8881)

Adjustable from 1.25V to 5V (MAX8880)

♦ Tiny 6-Pin SOT23 Package

♦ Thin 6-Pin TDFN Package

Linear Regulators with POK

________________________________________________________________ Maxim Integrated Products

1

GND

FB

OUT

16

POK

5

IN

MAX8880

MAX8881

MAX8880

SOT23-6

TOP VIEW

2

34

SHDN

POK

IN

1

GND

OUT

2

3

6

5

4

FB

TDFN

3mm x 3mm

SHDN

Pin Configurations

IN

OUT

FB

GND

4.7

μF

1

μF

ON

OFF

SHDN

2.5V TO 12V

REGULATION OK

1.25V TO 5V

UP TO 200mA

POK

MAX8881

Typical Operating Circuit

________________________Applications

19-1679; Rev 2; 12/07

Ordering Information

PART

OUTPUT

TEMP RANGE

PIN-PACKAGE

TOP MARK

MAX8880EUT-T

Adjustable

-40

°C to +85°C

6 SOT23-6

AAHR

MAX8880ETT-T

Adjustable

-40

°C to +85°C

6 TDFN

AGS

MAX8881EUT18-T

1.8V

-40

°C to +85°C

6 SOT23-6

AAHS

MAX8881EUT25-T

2.5V

-40

°C to +85°C

6 SOT23-6

AAHT

MAX8881EUT33-T

3.3V

-40

°C to +85°C

6 SOT23-6

AAHU

MAX8881EUT50-T

5.0V

-40

°C to +85°C

6 SOT23-6

AAHV

Smoke Detectors

Battery-Powered Alarms

Remote Transmitters

Smart Battery Packs

PDAs

Handy Terminals

CMOS Backup Power

Real-Time Clocks