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NCP605MN50T2G Datasheet(PDF) 9 Page - ON Semiconductor |
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NCP605MN50T2G Datasheet(HTML) 9 Page - ON Semiconductor |
9 / 13 page NCP605, NCP606 http://onsemi.com 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. Line Regulation The change in output voltage for a change in input voltage. The measurement is made under conditions of low dissipation or by using pulse techniques such that the average junction temperature is not significantly affected. Load Regulation The change in output voltage for a change in output load current at a constant temperature. Dropout Voltage The input to output differential at which the regulator output no longer maintains regulation against further reductions in input voltage. 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. Ground and Disable Currents Ground Current is the current that flows through the ground pin when the regulator operates without a load on its output (IGND). This consists of internal IC operation, bias, etc. It is actually the difference between the input current (measured through the LDO input pin) and the output load current. If the regulator has an input pin that reduces its internal bias and shuts off the output (enable/disable function), this term is called the disable current (IDIS). Current Limit and Short Circuit Current Limit Current Limit is value of output current by which output voltage drops by 10% with respect to its nominal value. Short Circuit Current Limit is output current value measured with output of the regulator shorted to ground. PSRR Power Supply Rejection Ratio is defined as ratio of output voltage and input voltage ripple. It is measured in decibels (dB). Output Noise Voltage This is the integrated value of the output noise over a specified frequency range. Input voltage and output load current are kept constant during the measurement. Results are expressed in mVrms or nV / √Hz. Turn−on and Turn−off Times Turn−on Time is time difference measured during power−up of the device from the moment when input voltage reaches 90% of its operating value to the moment when output voltage reaches 90% of its nominal value at specific output current or resistive load. Turn−off Time is time difference measured during power−down of the device from the moment when input voltage drops to 10% of its operating value to the moment when output voltage drops to 10% of its nominal value at specific output current or resistive load. Enable and Disable Times Enable Time is time difference measured during power−up of the device from the moment when enable voltage reaches 90% of input voltage operating value to the moment when output voltage reaches 90% of its nominal value at specific output current or resistive load. Disable Time is time difference measured during power−down of the device from the moment when enable voltage drops to 10% of input voltage operating value to the moment when output voltage drops to 10% of its nominal value at specific output current or resistive load. 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 no−load and full−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 at which the junction temperature reaches its maximum operating value. |
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