LM2931 Series

10

MOTOROLA ANALOG IC DEVICE DATA

DEFINITIONS

Dropout Voltage – The input/output voltage differential at

which the regulator output no longer maintains regulation

against further reductions in input voltage. Measured when

the output decreases 100 mV from nominal value at 14 V

input, dropout voltage is affected by junction temperature and

load current.

Line Regulation – The change in output voltage for a

change in the input voltage. The measurement is made under

conditions of low dissipation or by using pulse techniques

such that the average chip temperature is not significantly

affected.

Load Regulation – The change in output voltage for a

change in load current at constant chip temperature.

Maximum Power Dissipation – The maximum total

device dissipation for which the regulator will operate within

specifications.

Bias Current – That part of the input current that is not

delivered to the load.

Output Noise Voltage – The rms AC voltage at the

output, with constant load and no input ripple, measured over

a specified frequency range.

Long–Term Stabliity – Output voltage stability under

accelerated life test conditions with the maximum rated

voltage listed in the devices electrical characteristics and

maximum power dissipation.