tle4284 Infineon Technologies Corporation, tle4284 Datasheet - Page 12

• Manufacturer Part Number: tle4284
• Description: Voltage Regulator
• Manufacturer: Infineon Technologies Corporation

In the fixed voltage TLE 4284 devices the output voltage is divided internally and
compared to an internal reference of 1.25 V typical. The regulation loop controls the
output voltage to achieve the output voltage of 5 V, 3.3 V or 2.5 V. The variable device
compares the voltage difference between the adjust pin ADJ and the output pin Q to the
internal reference of 1.25 V; the output voltage is adjusted by an external voltage divider
between Q, ADJ and GND (see equation in Figure 7).
Output
The output current limitation is reduced as a function of the input voltage for high input
voltages above 25 V.
The TLE 4284 requires no output capacitor for stability, however we recommend to use
a ceramic capacitor to filter any noise and improve the transient response.
At the input of the regulator a capacitor is necessary for compensation of line influences.
A resistor of approx. 1
the input capacitor. A serial diode should be used to eliminate negative voltages from the
input.
For the variable voltage type an additional decoupling a capacitor
can improve the ripple rejection ratios.
Target Data Sheet Rev. 0.2
in series with
C
I
can damp the LC of the input inductivity and
12
C
ADJ
at the adjust pin
TLE 4284
2000-10-06