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MAX1725-MAX1726

12V, Ultra-Low IQ, Low-Dropout Linear Regulators

Maxim Integrated 

MAX1725/MAX1726

12V, Ultra-Low IQ, Low-Dropout

Linear Regulators

General Description

The MAX1725/MAX1726 are ultra-low supply current,

low-dropout linear regulators intended for low-power

applications that demand the longest possible battery

life. Unlike inferior PNP-based designs, the MAX1725/

MAX1726s’ PMOS pass elements maintain an ultra-low

2µA supply current throughout their entire operating

range and in dropout. Despite their ultra-low power

consumption, the MAX1725/MAX1726 have tight output

accuracy (1.5%) and require just 1µF output capacitance

to achieve good load-transient response.

These regulators have a wide input voltage range

(+2.5V to +12V), making them excellent choices for

systems powered from two lithium-ion (Li+) cells and 9V

batteries. Other features include reverse-battery protec-

tion, short-circuit protection, and thermal protection.

The MAX1725 provides an adjustable 1.5V to 5V output

using an external resistor-divider. The MAX1726 pro-

vides factory preset 1.8V, 2.5V, 3.3V, or 5V output volt-

ages (see the Ordering Information). Both devices are

available in a tiny 5-pin SOT23 package.

________________________Applications

Smoke Detectors

Remote Transmitters

Smart Battery Packs

Industrial Control Systems

Microcontroller Power

Real-Time Clock Backup Power

PDAs and Handy-Terminals

Battery-Powered Alarms

Typical Operating Circuit

VIN

2.5V TO 12V

ON

OFF

IN

OUT

MAX1726

SHDN

GND

OUTPUT

1.5V TO 5V

Features

o 2µA Supply Current

o Reverse-Battery Protection

o +2.5V to +12V Input Voltage Range

o Fixed 1.8V, 2.5V, 3.3V, and 5V Output Voltages

(MAX1726)

o Adjustable 1.5V to 5V Output Voltages (MAX1725)

o 20mA Guaranteed Output Current

o 1.5% Output Voltage Accuracy

o Small 1µF Output Capacitor

o Short-Circuit Protection

o Thermal Protection

o Tiny 5-Pin SOT23 Package

Ordering Information

PART

PIN-

TOP

TEMP RANGE

PACKAGE MARK

MAX1725EUK+T

-40°C to +85°C 5 SOT23 ADNK

MAX1726EUK18+T -40°C to +85°C 5 SOT23 ADNL

MAX1726EUK25+T -40°C to +85°C 5 SOT23 ADNM

MAX1726EUK25/V+T -40°C to +85°C 5 SOT23 AFMN

MAX1726EUK33+T -40°C to +85°C 5 SOT23 ADNN

MAX1726EUK50+T -40°C to +85°C 5 SOT23 ADNO

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

/V denotes an automotive-qualified part.

Note: See the Selector Guide for the output options as they relate

to the part number suffix.

PART

MAX1725EUK+T

MAX1726EUK18+T

MAX1726EUK25+T

MAX1726EUK25/V+T

MAX1726EUK33+T

MAX1726EUK50+T

Selector Guide

OUTPUT VOLTAGE

(V)

Adj 1.5 to 5.0

Fixed 1.8

Fixed 2.5

Fixed 2.5

Fixed 3.3

Fixed 5.0

Pin Configuration appears at end of data sheet.

For pricing, delivery, and ordering information, please contact Maxim Direct

at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.

19-1680; Rev 2; 11/12

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