 English |
|
|
|
|
|
|
|
| TLE4276_07 Datasheet, PDF (10/20 Pages) Infineon Technologies AG – Low Drop Voltage Regulator 400 mA current capability | |||
| |||
| ◁ |
TLE 4276
Application Information for Variable Output Regulator TLE 4276 V, SV, DV, GV
The output voltage of the TLE 4276 V can be adjusted between 2.5 V and 20 V by an
external output voltage divider, closing the control loop to the voltage adjust pin VA.
The voltage at pin VA is compared to the internal reference of typical 2.5 V in an error
amplifier. It controls the output voltage.
Internal
Reference
Vref
2.5 V Typical
Current
and
Saturation
Control
5Q
R1
CQ
22 µF
4 VA
R2
AEB02804
Figure 5
Application Detail External Components at Output for Variable
Voltage Regulator
The output voltage is calculated according to Equation (1):
VQ = (R1 + R2)/R2 Ã Vref, neglecting IVA
(1)
Vref is typically 2.5 V.
To avoid errors caused by leakage current IVA, we recommend to choose the resistor
value R2 according to Equation (2):
R2 < 50 kâ¦
(2)
For a 2.5 V output voltage the output pin Q is directly connected to the adjust pin VA.
The accuracy of the resistors R1 and R2 add an additional error to the output voltage
tolerance.
The operation range of the variable TLE 4276 V is VQ + 0.5 V to 40 V. For internal biasing
a minimum input voltage of 4.3 V is required. For output voltages below 4 V the voltage
drop is 4.3 V - VQ
Data Sheet
10
Rev. 2.7, 2007-10-23
|
▷ |
German
Russian
Spanish
Italian
Polish
Chinese
Japanese
Korean
French
Portuguese