Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

NCP623 Datasheet(PDF) 5 Page - ON Semiconductor

Part No. NCP623
Description  Ultra Low Noise 150 mA Low Dropout Voltage Regulator with ON/OFF Control
Download  16 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
Logo 

NCP623 Datasheet(HTML) 5 Page - ON Semiconductor

 
Zoom Inzoom in Zoom Outzoom out
 5 / 16 page
background image
NCP623
http://onsemi.com
5
DEFINITIONS
Load Regulation − The change in output voltage for a
change in load current at constant chip temperature.
Dropout Voltage − The input/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 (which is
measured at 1.0 V differential), dropout voltage is affected
by junction temperature, load current and minimum input
supply requirements.
Output Noise Voltage − The RMS AC voltage at the
output with a constant load and no input ripple, measured
over a specified frequency range.
Maximum Power Dissipation − The maximum total
dissipation for which the regulator will operate within
specifications.
Quiescent Current − Current which is used to operate the
regulator chip and is not delivered to the load.
Line Regulation − The change in input 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.
Line Transient Response − Typical over− and
undershoot response when input voltage is excited with a
given slope.
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, typically 150°C, the regulator turns off.
This feature is provided to prevent catastrophic failures from
accidental overheating.
Maximum Package Power Dissipation − The maximum
package power dissipation is the power dissipation level at
which the junction temperature reaches its maximum value
i.e. 125°C. The junction temperature is rising while the
difference between the input power (VCC X ICC) and the
output power (Vout X Iout) is increasing.
Depending on ambient temperature, it is possible to
calculate the maximum power dissipation, maximum load
current or maximum input voltage (see Application Hints:
Protection).
The maximum power dissipation supported by the device
is a lot increased when using appropriate application design.
Mounting pad configuration on the PCB, the board material
and also the ambient temperature are affected the rate of
temperature rise. It means that when the IC has good thermal
conductivity through PCB, the junction temperature will be
“low” even if the power dissipation is great.
The thermal resistance of the whole circuit can be
evaluated by deliberately activating the thermal shutdown
of the circuit (by increasing the output current or raising the
input voltage for example).
Then you can calculate the power dissipation by
subtracting the output power from the input power. All
variables are then well known: power dissipation, thermal
shutdown temperature (150°C for NCP623) and ambient
temperature.


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16 


Datasheet Download




Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn