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Micrel Semiconductor |
LM4040/LM4041
Precision Micropower Shunt Voltage
Reference
General Description
Ideal for space critical applications, the LM4040 and
LM4041 precision voltage references are available in the
subminiature (3mm × 1.3mm) SOT-23 surface-mount
package.
The LM4040 is available in fixed reverse breakdown
voltages of 2.500V, 4.096V, and 5.000V. The LM4041 is
available with a fixed 1.225V or an adjustable reverse
breakdown voltage.
The minimum operating current ranges from 60μA for the
LM4041-1.2 to 74μA for the LM4040-5.0. LM4040 versions
have a maximum operating current of 15mA. LM4041
versions have a maximum operating current of 12mA.
The LM4040 and LM4041 have bandgap reference
temperature drift curvature correction and low dynamic
impedance, ensuring stable reverse breakdown voltage
accuracy over a wide range of operating temperatures and
currents.
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
Features
Small SOT-23 package
No output capacitor required
Tolerates capacitive loads
Fixed reverse breakdown voltages of 1.225, 2.500V,
4.096V, and 5.000V
Adjustable reverse breakdown version
Contact Micrel for parts with extended temperature
range.
Applications
Battery-powered equipment
Data acquisition systems
Instrumentation
Process control
Energy management
Product testing
Automotive electronics
Precision audio components
Typical Application
LM4040, LM4041 Fixed Shunt
Regulator Application
LM4041 Adjustable Shunt
Regulator Application
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
June 24, 2014
Revision 3.0
Micrel, Inc.
Ordering Information
Part Number
LM4040CYM3-2.5
LM4040DYM3-2.5
LM4040CYM3-4.1
LM4040DYM3-4.1
LM4040CYM3-5.0
LM4040DYM3-5.0
LM4041CYM3-1.2
LM4041DYM3-1.2
LM4041CYM3-ADJ
LM4041DYM3-ADJ
Marking
Y2C
Y2D
Y4C
Y4D
Y5C
Y5D
Y1C
Y1D
YAC
YAD
Pin Configuration
Voltage
2.500V
2.500V
4.096V
4.096V
5.000V
5.000V
1.225V
1.225V
1.24V to 10V
1.24V to 10V
LM4040/LM4041
Accuracy, Temp. Coefficient
±0.5%, 100ppm/°C
±1.0%, 150ppm/°C
±0.5%, 100ppm/°C
±1.0%, 150ppm/°C
±0.5%, 100ppm/°C
±1.0%, 150ppm/°C
±0.5%, 100ppm/°C
±1.0%, 150ppm/°C
±0.5%, 100ppm/°C
±1.0%, 150ppm/°C
Package
3-Pin SOT-23
3-Pin SOT-23
3-Pin SOT-23
3-Pin SOT-23
3-Pin SOT-23
3-Pin SOT-23
3-Pin SOT-23
3-Pin SOT-23
3-Pin SOT-23
3-Pin SOT-23
SOT-23 (M3)
Fixed Version
SOT-23 (M3)
Adjustable Version
Pin Description
Pin Number
Fixed
1
-
2
3
Pin Number
Adjustable
2
1
3
-
Pin Name
+
FB
-
NC
Pin Function
Cathode, connect to positive voltage.
Feedback, connect to a resistive divider network to set the output voltage.
Anode, connect to negative voltage.
Not internally connected. This pin must be left floating or connected to – (Pin 2).
June 24, 2014
2
Revision 3.0
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