5962-8958701EA

LM2940S, T, MP £ 100 ms ......................................60V
LM2940CS, T £ 1 ms ...............................................45V
Internal Power Dissipation
(Note 2) Internally Limited
Maximum Junction Temperature ........................150°C
Storage Temperature Range .....−65°C £ TJ £ +150°C
Lead Temperature, Time for Wave Soldering
TO-220 (T) Package 260°C, ......................................10s


Description

The LM2940/LM2940C positive voltage regulator features the ability to source 1A of output current with a dropout voltage of typically 0.5V and a maximum of 1V over the entire temperature range. Furthermore, a quiescent current reduction circuit has been included which reduces the ground current when the differential between the input voltage and the output voltage exceeds approximately 3V. The quiescent current of LM2940/LM2940C with 1A of output current and an input-output differential of 5V is therefore only 30 mA. Higher quiescent currents only exist when the regulator is in the dropout mode (VIN − VOUT £ 3V). 

Designed also for vehicular applications, the LM2940/ LM2940C and all regulated circuitry are protected from reverse battery installations or 2-battery jumps. During line transients, such as load dump when the input voltage canmomentarily exceed the specified maximum operating voltage, the regulator LM2940/LM2940C will automatically shut down to protect both the internal circuits and the load. 

The LM2940/ LM2940C cannot be harmed by temporary mirror-image insertion. Familiar regulator features such as short circuit thermal overload protection are also provided.