參數(shù)資料
型號: TLE4276V85
廠商: SIEMENS A G
元件分類: 基準電壓源/電流源
英文描述: Low-Drop Voltage Regulator
中文描述: FIXED POSITIVE LDO REGULATOR, 0.5 V DROPOUT, PZFM5
封裝: PLASTIC, TO-220, 5 PIN
文件頁數(shù): 2/19頁
文件大?。?/td> 209K
代理商: TLE4276V85
TLE 4276
Data Sheet Version 2.2
2
2000-10-11
Functional Description
The TLE 4276 is a low-drop voltage regulator in a TO package. The IC regulates an input
voltage up to 40 V to
V
Q,nom
= 5.0 V (V50), 8.5 V (V85), 10 V (V10) and adjustable voltage
(V). The maximum output current is 400 mA. The IC can be switched off via the inhibit
input, which causes the current consumption to drop below 10
A. The IC is short-circuit-
proof and includes temperature protection which turns off the device at overtemperature.
Dimensioning Information on External Components
The input capacitor
C
I
is necessary for compensation of line influences. Using a resistor
of approx. 1
τ
in series with
C
I
, the oscillating of input inductivity and input capacitance
can be damped. The output capacitor
C
Q
is necessary for the stability of the regulation
circuit. Stability is guaranteed at values
C
Q
22
F and an ESR of
3
τ
within the
operating temperature range.
Circuit Description
The control amplifier compares a reference voltage to a voltage that is proportional to the
output voltage and drives the base of the series transistor via a buffer. Saturation control
as a function of the load current prevents any oversaturation of the power element. The
IC also incorporates a number of internal circuits for protection against:
Overload
Overtemperature
Reverse polarity
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