IFX 91041EJ V50 Infineon Technologies, IFX 91041EJ V50 Datasheet - Page 12

• Manufacturer Part Number: IFX 91041EJ V50
• Manufacturer: Infineon Technologies

Specifications of IFX 91041EJ V50

• Packages: PG-DSO-8
• Comment: VQ fixed to 5.0V; Tolerance 2% up to 1000mA; DSO-8 EP
• Vq (max): 5.0 V
• Iq (max): 1,800.0 mA
• Iq (typ): 7,000.0 µA
• Output: Buck Converter

8
Note: The following information is given as a hint for the implementation of the device only and shall not be
8.1
The stability of the output voltage can be achieved with a simple RC connected between pin COMP and GND. The
standard configuration using the swiching frequency of the internal oscillator is a ceramic capacitor
and
application needs, such as varying switching frequency (using the sychronizing function), different types of buck
capacitor (ceramic or tantalum) etc.
The compensation network is essential for control loop stability. Leaving pin COMP open might lead to instable
operation.
8.2
The TLE control loop is optimized for ceramic buck capacitors
capacitors with ESR up to 300mΩ, an additional compensation capacitance
required. It’s value calculates:
whereas
Figure 4
8.3
In order to minimize losses and for fast recovery, a schottky catch diode is required. Disconnecting the catch diode
during operation might lead to destruction of the IC.
Data Sheet
R
regarded as a description or warranty of a certain functionality, condition or quality of the device.
COMP
C
COMP2
= 22kΩ. By slight modifications to the compensation network the stability can be optimized for different
Application Information
Frequency Compensation
Compensating a tantalum buck capacitor
High-ESR buck capacitor compensation
Catch Diode
needs to stay below 5nF.
C
COMP2
C
COMP2
C
R
COMP
COMP
=
C
BU
COMP
*
ESR
12
3
(
C
BU
C
) /
BU
IFX91041
R
. In order to maintain stability also for tantalum
C
COMP
2
BU1
Application _C-COMP2.vsd
GND
,
C
COMP2
Application Information
at pin COMP to GND is
Rev. 1.1, 2011-07-08
C
COMP
IFX91041
= 22nF