TLE6368_06 Datasheet, PDF (6/59 Pages) Infineon Technologies AG – Multi-Voltage Processor Power Supply

TLE 6368 / SONIC
1.4 Pin definitions and functions (cont’d)
Pin No. Symbol Function
27
Q_LDO1 Voltage Regulator Output 1; 5V output; acts as the reference
for the voltage trackers.The SPI and window watchdog logic is
supplied from this voltage. For stability a ceramic capacitor of
470nF to GND is sufficient.
28
Bootstrap Bootstrap Input; add the bootstrap capacitor between pin SW
and pin Bootstrap, the capcitance value should be 2% of the
Buck converter output capacitance
29, 31 SW
Switch Output; connect both pins externally through short lines
directly to the cathode of the catch diode and the Buck circuit
inductance.
30, 32 IN
Supply Voltage Input; connect both pins externally through
short lines to the input filter/the input capacitors.
33
BOOST Boost Input; for switching loss minimization connect a diode
(cathode directly to boost pin) in series with a 100nF ceramic
capacitor to the IN pin and from the anode of the diode to the
buck converter output a 22Ω resistor. Recommended for 42V
applications. In 12/24V applications connect boost directly to IN.
34
WAKE Wake Up Input; a positive voltage applied to this pin turns on
the device
35
SLEW Slew control Input; a resistor to GND defines the current slope
in the buck switch for reduced EME
Data Sheet
6
Rev. 2.2, 2006-12-01