LM2931CT

Product Summary

The LM2931CT is a positive voltage regulator. The LM2931CT 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 LM2931CT the ideal regulator for standby power systems. Applications include memory standby circuits, CMOS and other low power processor power supplies as well as systems demanding as much as 100mA of output current. Designed originally for automotive applications, the LM2931CT 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 LM2931CT cannot be harmed by temporary mirror-image insertion. Familiar regulator features such as short circuit and thermal overload protection are also provided.

Parametrics

LM2931CT absolute maximum ratings: (1)Input Voltage Operating Range: 26V; (2)Overvoltage Protection: 60V; (3)Operating Ambient Temperature Range: −40℃ to +85℃; (4)Maximum Junction Temperature: 125℃; (5)Storage Temperature Range: −65℃ to +150℃; (6)Lead Temp. (Soldering, 10 seconds): 230℃; (7)ESD Tolerance: 2000V; (8)Quiescent Current IO = 100mA, VIN = 14V, TJ = 25℃: 15 mA; (9)Ripple Rejection fO = 120Hz: 80 dB.

Features

LM2931CT features: (1)Very low quiescent current; (2)Output current iexcess of 100 mA; (3)Input-output differential less tha0.6V; (4)Reverse battery protection; (5)60V load dump protection; (6)−50V reverse transient protection; (7)Short circuit protection; (8)Internal thermal overload protection; (9)Mirror-image insertioprotection; (10)Available iTO-220, TO-92, TO-263, SO-8 or 6-Bump micro SMD packages; (11)Available as adjustable with TTL compatible switch; (12)See AN-1112 for micro SMD considerations.

Diagrams