19-1787; Rev 0; 8/00
Improved Precision Micropower Shunt Voltage
Reference with Multiple Reverse Breakdown Voltages
General Description
Features
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, 4.096V,
and 5.000V. Ideal for space-critical applications, the
LM4040 is offered in the subminiature 3-pin SC70 sur-
ꢀ Ultra-Small 3-Pin SC70 Package
ꢀ 0.1% max Initial Accuracy
ꢀ 100ppm/°C max Temperature Coefficient
Guaranteed over -40°C to +85°C Temperature
Range
✕
face-mount package (1.8mm 1.8mm), 50% smaller
than comparable devices in SOT23 surface-mount
packages (SOT23 versions are also available).
ꢀ Wide Operating Current Range: 60µA to 15mA
ꢀ Low 28µV
Output Noise (10Hz to 10kHz)
RMS
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.
ꢀ 2.048V, 2.500V, 3.000V, 4.096V, and 5.000V Fixed
Reverse Breakdown Voltage
ꢀ No Output Capacitors Required
ꢀ Tolerates Capacitive Loads
The LM4040 does not require an external stabilizing
capacitor while ensuring stability with any capacitive
load.
For a 1.225V output version, refer to the LM4041 data
sheet.
Selector Guide
________________________Applications
Portable, Battery-Powered Equipment
OUTPUT
VOLTAGE
(V)
TEMP.
RANGE
PIN-
PACKAGE
PART
Notebook Computers
Cell Phones
LM4040_IX3-2.1
LM4040_IX3-2.1
-40°C to +85°C
-40°C to +85°C
3 SOT23-3
3 SC70-3
3 SOT23-3
3 SC70-3
3 SOT23-3
3 SC70-3
3 SOT23-3
3 SC70-3
3 SOT23-3
3 SC70-3
2.048
2.048
2.500
2.500
3.000
3.000
4.096
4.096
5.000
5.000
Industrial Process Controls
LM4040_IM3-2.5 -40°C to +85°C
LM4040_IX3-2.5 -40°C to +85°C
LM4040_IM3-3.0 -40°C to +85°C
LM4040_IX3-3.0 -40°C to +85°C
LM4040_IM3-4.1 -40°C to +85°C
LM4040_IX3-4.1 -40°C to +85°C
LM4040_IM3-5.0 -40°C to +85°C
LM4040_IX3-5.0 -40°C to +85°C
Pin Configuration
TOP VIEW
+
-
1
2
Ordering Information appears at end of data sheet.
3
N.C.*
LM4040
SC70-3/SOT23-3
*PIN 3 MUST BE LEFT FLOATING
OR CONNECTED TO PIN 2.
________________________________________________________________ Maxim Integrated Products
1
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.