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When the adjustable regulator is used.

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The data sheet speci. Best load regulation is obtained.

For fixed voltage devices the top of R1 is internally. This will improve transient response as well as pro. By plac- ing a resistor between these two terminals, a con- stant Current is caused to flow through R1 and down vatasheet R2 to set the overall output voltage.

  JIS Z 8721 PDF

Normally this current is chosen to be the specified minimum load current of 10mA. For fixed voltage devices R1 and R2 are included in the al1117. Tantalum, or aluminum electrolytic capacitors can be used for bypassing.

APL datasheet, APL datasheets, manuals for APL electornic semiconductor part

Basic Adjustable Regulator ues will improve ripple rejection by bypassing the in- put to the regulator. Load Regulation When the adjustable regulator is used. Load regula- tion will be limited by the resistance of the wire con- necting the regulator to the load. The data sheet speci- fication for load regulation is measured at the output pin of the device.

Best load regulation is obtained when the top of the resistor divider R1 is tied di- rectly to the output pin of dtasheet device, not to the load. For fixed voltage devices the top of R1 is internally connected to the output, and the ground pin can be connected to low side of the load.


If R1 were con- nected to the load, RP is multiplied by the divider ratio, the effective resistance between the regulator and the load would be: Proper capacitor selection is important to ensure proper operation. The APL output capacitor selection is dependent upon the ESR equivalent series resistance of the output capacitor to maintain stability.

This will improve transient response as well as pro- mote stability. A low-ESR solid tantalum capacitor works extremely well and provides good transient re- sponse and stability over temperature. Home – IC Supply – Link.