NCV4294C

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9

DEFINITIONS

General

All measurements are performed using short pulse low

duty cycle techniques to maintain junction temperature as

close as possible to ambient temperature.

Output Voltage

The output voltage parameter is defined for specific

temperature, input voltage and output current values or

specified over Line, Load and Temperature ranges.

Line Regulation

The change in output voltage for a change in input

voltage measured for specific output current over operating

ambient temperature range.

Load Regulation

The change in output voltage for a change in output

current measured for specific input voltage over operating

ambient temperature range.

Dropout Voltage

The input to output differential at which the regulator

output no longer maintains regulation against further

reductions in input voltage. It is measured when the output

drops 100 mV below its nominal value. The junction

temperature, load current, and minimum input supply

requirements affect the dropout level.

Quiescent Current

current (measured through the LDO input pin) and the

output load current.

Current Limit

Current Limit is value of output current by which output

voltage drops 100 mV below its nominal value. It means

that the device is capable to supply minimum 30 mA.

PSRR

Power Supply Rejection Ratio is defined as ratio of

output voltage and input voltage ripple. It is measured in

decibels (dB).

Thermal Protection

Internal thermal shutdown circuitry is provided to

protect the integrated circuit in the event that the maximum

junction temperature is exceeded. When activated at

typically 175

°C, the regulator turns off. This feature is

provided to prevent failures from accidental overheating.

Maximum Package Power Dissipation

The power dissipation level is maximum allowed power

dissipation for particular package or power dissipation at

which the junction temperature reaches its maximum

operating value, whichever is lower.