General Description

The LM4040 is a precision two-terminal shunt mode,

bandgap voltage reference available in fixed reverse

breakdown voltages of 2.048V, 2.500V, 3.000V, 3.3V,

4.096V, and 5.000V. Ideal for space-critical applica-

tions, the LM4040 is offered in the subminiature 3-pin

smaller than comparable devices in SOT23 surface-

mount packages (SOT23 versions are also available).

Laser-trimmed resistors ensure precise initial accuracy.

With a 100ppm/°C temperature coefficient, the device

is offered in four grades of initial accuracy ranging from

0.1% to 1%. The LM4040 has a 60µA to 15mA shunt

current capability with low dynamic impedance, ensur-

ing stable reverse breakdown voltage accuracy over a

wide range of operating temperatures and currents.

The LM4040 does not require an external stabilizing

capacitor while ensuring stability with any capacitive

load.

The LM4040 is guaranteed over the temperature range

of -40°C to +125°C.

For a 1.225V output version, refer to the LM4041 data

sheet.

________________________Applications

Portable, Battery-Powered Equipment

Notebook Computers

Cell Phones

Industrial Process Controls

Features

o Ultra-Small 3-Pin SC70 Package

o 0.1% (max) Initial Accuracy

o 100ppm/°C (max) Temperature Coefficient

Guaranteed over -40°C to +125°C Temperature

Range

o Wide Operating Current Range: 60µA to 15mA

o 2.048V, 2.500V, 3.000V, 3.3V, 4.096V, and 5.000V

Fixed Reverse Breakdown Voltages

o No Output Capacitors Required

o Tolerates Capacitive Loads

Improved Precision Micropower Shunt Voltage

Reference with Multiple Reverse Breakdown Voltages

________________________________________________________________

Maxim Integrated Products

1

-

1

3

N.C.*

+

+

LM4040

SC70-3/SOT23-3

TOP VIEW

2

*PIN 3 MUST BE LEFT UNCONNECTED

OR CONNECTED TO PIN 2.

PART

TEMP RANGE

PIN-

PACKAGE

OUTPUT

VOLTAGE

(V)

LM4040_IM3-2.1+T

-40°C to +85°C

3 SOT23

2.048

LM4040_IX3-2.1+T

-40°C to +85°C

3 SC70

2.048

LM4040_EM3-2.1+T

-40°C to +125°C

3 SOT23

2.048

LM4040_EX3-2.1+T

-40°C to +125°C

3 SC70

2.048

LM4040_IM3-2.5+T

-40°C to +85°C

3 SOT23

2.500

LM4040_IX3-2.5+T

-40°C to +85°C

3 SC70

2.500

LM4040_IM3-2.5/V+T

-40°C to +85°C

3 SC70

2.500

LM4040_EM3-2.5+T

-40°C to +125°C

3 SOT23

2.500

LM4040_EM3-2.5/V+T

-40°C to +125°C

3 SOT23

2.500

LM4040_EX3-2.5+T

-40°C to +125°C

3 SC70

2.500

LM4040_IM3-3.0+T

-40°C to +85°C

3 SOT23

3.000

LM4040_IX3-3.0+T

-40°C to +85°C

3 SC70

3.000

LM4040_EX3-3.0+T

-40°C to +125°C

3 SC70

3.000

LM4040_EX3-3.3+T

-40°C to +125°C

3 SC70

3.300

LM4040_IM3-4.1+T

-40°C to +85°C

3 SOT23

4.096

LM4040_IX3-4.1+T

-40°C to +85°C

3 SC70

4.096

LM4040_EM3-4.1

-40°C to +125°C

3 SOT23

4.096

LM4040_EM3-4.1/V+T

-40°C to +125°C

3 SOT23

4.096

LM4040_EX3-4.1+T

-40°C to +125°C

3 SC70

4.096

LM4040_IM3-5.0+T

-40°C to +85°C

3 SOT23

5.000

LM4040_IX3-5.0+T

-40°C to +85°C

3 SC70

5.000

LM4040_EM3-5.0+T

-40°C to +125°C

3 SOT23

5.000

LM4040_EM3-5.0/V+T

-40°C to +125°C

3 SOT23

5.000

LM4040_EX3-5.0+T

-40°C to +125°C

3 SC70

5.000

Pin Configuration

Selector Guide

19-1787; Rev 7; 11/11

Ordering Information 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.maxim-ic.com.

+

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

T = Tape and reel.