TLE 6368G1 Infineon Technologies, TLE 6368G1 Datasheet - Page 51

• Manufacturer Part Number: TLE 6368G1
• Manufacturer: Infineon Technologies

Specifications of TLE 6368G1

• Packages: P-DSO-36
• Comment: Successor: TLE6368G2
• Vq (max): 5.0 V, 3.3/2.6 V, 3.3/2.6 V
• Iq (max): 1,500.0 mA
• Iq (typ): 30.0 µA
• Output: Linear (Buck Preregulator)

5.2
A typical choice of external components for the buck converter is given in figure 14. For
basic operation of the buck converter the input capacitor C
C
pump capacitors C
recommended as a protection against overvoltage spikes.
The additional components shown on top of the circuit lower the electromagnetic
emission (L
battery systems the switching loss minimization feature might not be used. The Boost pin
(33) is connected directly to the IN pins (32, 30) in that case and the components R
C
5.2.1
The inductance value determines together with the input voltage, the output voltage and
the switching frequency the current ripple which occurs during normal operation of the
step down converter. This current ripple is important for the all over ripple at the output
of the switching converter.
As a rule of thumb this current ripple I is chosen between 10% and 50% of the load
current.
For optimum operation of the control loop of the Buck converter the inductance value
should be in the range indicated in section 3.3, recommended operation range.
When picking finally the inductance of a certain supplier (Epcos, Coilcraft etc.) the
saturation current has to be considered. With a maximum current limit of the Buck
converter of 3.2A an inductance with a minimum saturation current of 3.2A has to be
chosen.
Data Sheet
BTP
Boost
, the catch diode D
and D
Buck converter circuit
Buck inductance (L
I
Boost
, C
I1
are left away.
, C
FLY
I3
, R
and C
Slew
B
, the inductance L
) and the switching losses (R
CCP
B
) selection:
L
are necessary. A Zener Diode at the FB/L_IN input is
=
-------------------------------------------------- -
V
I
–
f
SW
V
51
OUT
B
, the output capacitor C
V
I
V
I
OUT
Boost
I2
, the bootstrap capacitor
, C
Boost
Rev. 2.2, 2006-12-01
TLE 6368 / SONIC
, D
B
and the charge
Boost
). For 12V
Boost
,