431CIM

LM431 Adjustable Precision Zener Shunt Regulator December 1999 LM431 Adjustable Precision Zener Shunt Regulator General Description The LM431 is a 3-terminal adjustable shunt regulator with guaranteed temperature stability over the entire temperature range of operation. It is now available in a chip sized package (4-Bump micro SMD) using National’s micro SMD package technology. The output voltage may be set at any level greater than 2.5V (VREF) up to 36V merely by selecting two external resistors that act as a voltage divided network. Due to the sharp turn-on characteristics this device is an excellent replacement for many zener diode applications. Features n Average temperature coefficient 50 ppm/˚C n Temperature compensated for operation over the full temperature range n Programmable output voltage n Fast turn-on response n Low output noise n LM431 in micro SMD package Connection Diagrams TO-92: Plastic Package SOT-23: 3-Lead Small Outline DS010055-28 DS010055-1 Top View 4-Bump micro SMD Top View SO-8: 8-Pin Surface Mount DS010055-54 DS010055-2 Top view Top View (bump side down) © 1999 National Semiconductor Corporation DS010055 www.national.com LM431 Ordering Information Package TO-92 Typical Accuracy Order Number/Package Marking 0.5% LM431CCZ/ LM431CCZ LM431CIZ/ LM431CIZ SO-8 LM431CCM/ 431CCM LM431CIM/ 431CIM SOT-23 LM431CCM3/ N1B LM431CIM3 N1A micro SMD – 1% LM431BCZ/ LM431BCZ LM431BIZ/ LM431BIZ LM431BCM/ 431BCM LM431BIM/ 431BIM LM431BCM3/ N1D LM431BIM3 N1...