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 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 can momentarily exceed
the specified maximum operating voltage, the regulator 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 and thermal overload protection are also provided.
Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR.
The Long Term Failure Rates were calculated
at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress
temperature of 150°C to an application temperature of 55°C.
For more information on Reliability Metrics, please click here.
LM2940C
LP38690
