Low Dropout Regulator with Delayed Reset

LM2925

HTC

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7 −

DETAILED DESCRIPTION

Dropout Voltage:

Th input-output voltage differential at which the circuit ceases to regulate against further reduction in

input voltage. Measured when the outpu voltage has dropped 100mV from the nominal value obtained

at 14V in-put, dropout voltage is dependent upon load current and junction temperature.

Input Voltage

The DC voltage applied to the input terminals with respect to ground. Input-Output Differential: The

voltage difference between the unregulated input voltage and the regulated output volt-age for which

the regulator will operate.

Line Regulation

The change in output voltage for a change in the input voltage. The measurement is made under

condi-tions of low dissipation or by using pulse techniques such that the average chip temperature is

not significantly af-fected.

Load Regulation

The change inoutput voltage for a change in load current at constant chip temperature.

Long Term Stability

Output voltage stability under acceler-ated life-test conditions after 1000 hours with maximum rated

voltage and junction temperature.

Output Noise Voltage

The rms AC voltage at the output, with constant load and no inpu ripple, measured over aspecified

frequency range.

Quiescent Current

The part of the positive input current that does not contribute to the positive load current. The

regulator ground lead current.

Ripple Rejection

The ratio of the peak-to-peak input ripple voltage to the peak-to-peak output ripple voltage.

The percentage change in ou-put voltage for a thermal variation from room temperature to either

temperature extreme.