NCV47711

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8

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

and minimum input supply requirements affect the dropout

level.

Quiescent and Disable Currents

current (measured through the LDO input pin) and the

output load current. If Enable pin is set to LOW the regulator

reduces its internal bias and shuts off the output, this term is

Current Limit

Current Limit is value of output current by which output

voltage drops below 90% of its nominal value.

PSRR

Power Supply Rejection Ratio is defined as ratio of output

voltage and input voltage ripple. It is measured in decibels

(dB).

Line Transient Response

Typical output voltage overshoot and undershoot response

when the input voltage is excited with a given slope.

Load Transient Response

Typical output voltage overshoot and undershoot response

when the output current is excited with a given slope

between low−load and high−load conditions.

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.