APL5156
Application Information (Cont.)
SOP-8P
Adjustable Regulator Application
The output voltage of APL5156 can be adjusted from 3V
to 20V by using two external resistors. The resistors set
the output voltage based on the following equation:
0.024
5
8
7
6
æ
ö
ö
æ
R1
ç
÷
÷
ç
ç
è
VOUT = V
1+
REF ç
÷
÷
R2
ø
è
ø
0.138
where VREF=1.24V
Feedback resistor R2 should be larger than 100kW and
smaller than 1MW. The resistors should be placed as
close the device as possible to avoid noise.
1
2
3
4
Recommended Minimum Footprint
Unit : Inch
0.050
SOT-23-5
0.076
0.038
0.02
Unit : Inch
SOT-89
0.076
0.059
0.022
Unit : Inch
Copyright ã ANPEC Electronics Corp.
10
www.anpec.com.tw
Rev. A.6 - Oct., 2009