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