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TLE4276SV85 データシート(PDF) 10 Page - Infineon Technologies AG

部品番号 TLE4276SV85
部品情報  Low-Drop Voltage Regulator
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メーカー  INFINEON [Infineon Technologies AG]
ホームページ  http://www.infineon.com
Logo INFINEON - Infineon Technologies AG

TLE4276SV85 データシート(HTML) 10 Page - Infineon Technologies AG

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TLE 4276
Data Sheet Version 2.2
10
2000-10-11
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.
Figure 5
Application Detail External Components at Output for Variable
Voltage Regulator
The output voltage is calculated according to Equation 1:
V
Q =(R1 + R2)/R2
V
ref, neglecting IVA
(1)
V
ref is typically 2.5 V.
To avoid errors caused by leakage current
I
VA, we recommend to choose the resistor
value
R
2 according to Equation 2:
R
2 <50 k
τ
(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
R
1 and R2 add an additional error to the output voltage
tolerance.
The operation range of the variable TLE 4276 V is
V
Q + 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 –
V
Q
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


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