TLE6389_07 Datasheet, PDF (5/38 Pages) Infineon Technologies AG – Step-Down DC/DC Controller

TLE 6389
Pin No
10
11
12
13
14
Symbol
RO
BDS
GDRV
VS
CS
Function
Reset output.
Open drain output from undervoltage reset comparator at the adjustable
version (TLE6389-2 GV),
Pull down structure with an internal 20kΩ pull up resistor to VOUT at the
5V version (TLE6389-2 GV50 and TLE6389-3 GV50).
Buck driver supply input.
Connect a ceramic capacitor between BDS and VS to generate clamped
gate-source voltage to supply the driver of the PMOS power stage.
Gate drive output.
Connect to the gate of the external P-Channel MOSFET. The voltage at
GDRV swings between the levels of VS and BDS.
Device supply input.
Connect a 220nF ceramic cap close to the pin in addition to the low ESR
tantalum input capacitance.
Current-sense input.
Connect current-sense resistor between VS and CS. The voltage drop
over the sense-resistor determines the peak current flowing in the buck
circuit. The external MOSFET is turned off when the peak current is
exceeded.
Datasheet Rev. 2.1
5
2007-08-13