參數(shù)資料
型號(hào): TLE4276GV85
廠商: SIEMENS A G
元件分類: 基準(zhǔn)電壓源/電流源
英文描述: CONNECTOR ACCESSORY
中文描述: 8.5 V FIXED POSITIVE LDO REGULATOR, 0.5 V DROPOUT, PDSO5
文件頁數(shù): 10/19頁
文件大?。?/td> 209K
代理商: TLE4276GV85
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
= (
R
1
+
R
2
)/
R
2
V
ref
, neglecting
I
VA
(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
R
2
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
22 μF
Q
VA
4
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