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LM2931IBPX-3.3 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM2931IBPX-3.3 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 18 page LM2931 Series Low Dropout Regulators General Description The LM2931 positive voltage regulator features a very low quiescent current of 1mA or less when supplying 10mA loads. This unique characteristic and the extremely low input-output differential required for proper regulation (0.2V for output currents of 10mA) make the LM2931 the ideal regulator for standby power systems. Applications include memory standby circuits, CMOS and other low power pro- cessor power supplies as well as systems demanding as much as 100mA of output current. Designed originally for automotive applications, the LM2931 and all regulated circuitry are protected from reverse battery installations or 2 battery jumps. During line transients, such as a load dump (60V) when the input voltage to the regulator can momentarily exceed the specified maximum operating voltage, the regulator will automatically shut down to protect both internal circuits and the load. The LM2931 cannot be harmed by temporary mirror-image insertion. Familiar regu- lator features such as short circuit and thermal overload protection are also provided. The LM2931 family includes a fixed 5V output (±3.8% toler- ance for A grade) or an adjustable output with ON/OFF pin. Both versions are available in a TO-220 power package, TO-263 surface mount package, and an 8-lead surface mount package. The fixed output version is also available in the TO-92 plastic and 6-Bump micro SMD packages. Features n Very low quiescent current n Output current in excess of 100 mA n Input-output differential less than 0.6V n Reverse battery protection n 60V load dump protection n −50V reverse transient protection n Short circuit protection n Internal thermal overload protection n Mirror-image insertion protection n Available in TO-220, TO-92, TO-263, SO-8 or 6-Bump micro SMD packages n Available as adjustable with TTL compatible switch n See AN-1112 for micro SMD considerations Connection Diagrams FIXED VOLTAGE OUTPUT TO-220 3-Lead Power Package 00525406 Front View TO-263 Surface-Mount Package 00525411 Top View 00525412 Side View 8-Pin Surface Mount TO-92 Plastic Package 00525407 Top View *NC = Not internally connected. Must be electrically isolated from the rest of the circuit for the micro SMD package. 00525408 Bottom View March 2002 © 2002 National Semiconductor Corporation DS005254 www.national.com |
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