Datasheet

IFX20001
Application Information
Data Sheet 9 Rev. 1.1, 2013-01-08
6 Application Information
Note: The following information is given as a hint for the implementation of the device only and shall not be
regarded as a description or warranty of a certain functionality, condition or quality of the device.
Figure 3 Application Diagram
Application Information
The output voltage of the IFX20001 is divided and compared to an internal reference of 2.5 V typical. A regulation
loop controls the output to achieve a stabilized output voltage.
Figure 3 shows a typical application circuit. In order to maintain the stability of the control loop the IFX20001
output requires an output capacitor
C
Q
of at least 3.3 μF with a minimum required ESR of 2.5 Ω and a maximum
allowed ESR of 6 Ω for the IFX20001MBV33 and 8 Ω for the IFX20001MBV50. It is recommended to use for
C
Q
a
suitable tantalum capacitor or a multilayer ceramic capacitor with a sufficiently dimensioned series resistor in order
to cover the required ESR range over the full operating temperature range from -40 °C to 125 °C.
1)
At the input of the regulator a capacitor is required for compensating line influences. A resistor of approximately
1 Ω in series with the input capacitor (
C
I
) can dampen oscillations that could occur due to the input line inductance
and the input capacitor.
1) For usage of ceramic capacitors without applying an additional series resistor at the output please refer to the IFX20002
which is a corresponding voltage regulator series specially designed for the usage of low-ESR output capacitors (< 2Ω) .
C
Q
C
I
I
GND
Q
INH
IFX20001
V
I
4.7µF100nF
Inhibit
V
Q
R
Q
3.3Ω