Datasheet

Data Sheet 13 Rev. 1.1, 2009-10-09
TLE42764
Application Information
Figure 4 External Components at Output for Variable Voltage Regulator
The output voltage can be easily calculated, neglecting the current flowing into the VA pin:
where
to neglect the current flowing into the VA pin,
with:
•
V
ref
: internal reference voltage, typically 2.5V
•
R
1
: resistor between regulator output Q and voltage adjust pin VA
•
R
2
: resistor between voltage adjust pin VA and GND
For a 2.5 V output voltage the output pin Q has to be directly connected to the adjust pin VA.
Take into consideration, that the accuracy of the resistors
R
1
and R
2
adds an additional error to the output voltage
tolerance.
AEB02804
Current
and
Saturation
Control
Internal
Reference
2.5 V Typical
5
V
ref
R
2
R
1
C
Q
22 µF
Q
VA
4
V
Q
R
1
R
2
+
R
2
-------------------
V
ref
×=
R
2
50 kΩ<