LM4431 Datasheet | National Semiconductor

Description Ideal for space critical applications, the LM4431 voltage reference is available in the sub-miniature (3 mm x 1.3 mm) SOT-23 surface-mount package. The LM4431’s advanced design eliminates the need for an external stabilizing capacitor while ensuring stability with any capacitive load, thus making the LM4431 easy to use. The operating current range is 100 µA to 15 m A. The LM4431 utilizes fuse and zener-zap reverse breakdown voltage trim during wafer sort to ensure that the parts have an accuracy of better than ± 2.0% at 25˚C. Bandgap reference temperature drift curvature correction and low dynamic impedance ensure stable reverse breakdown voltage accuracy over a wide range of operating temperatures and currents. n Tolerates capacitive loads n Fixed reverse breakdown voltage of 2.50V Key Specifications n n n n n Output voltage tolerance 25˚C: ± 2.0% (max) Low output noise (10 Hz to 10 k Hz): 35 µVrms (typ) Wide operating current range: 100 µA to 15 m A mercial temperature range: 0˚C to +70˚C Low temperature coefficient: 30 ppm/˚C (typ) Applications n n n n n n n Portable, Battery-Powered Equipment Data Acquisition Systems Instrumentation Process Control Energy Management Product Testing Power Supplies Features n Small package: SOT-23 n No output capacitor required Connection Diagram SOT-23 DS011374-1 - This pin must be left floating or connected to pin 2. Top View Order Number LM4431M3-2.5 See NS Package Number M03B (JEDEC Registration TO-236AB) SOT-23 Package Marking Information Only three fields of marking are possible on the SOT-23’s small surface. The following table gives the meaning of the three fields. Part Marking S2E First Field: S = Reference Second Field: 2 = 2.500V Voltage Option Third Field: E = Initial Reverse Breakdown Voltage Tolerance of ± 2.0% Field Definition © 1998 National Semiconductor Corporation DS011374 .national. Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the...