TLE 6389-2G V50 Infineon Technologies, TLE 6389-2G V50 Datasheet - Page 28

• Manufacturer Part Number: TLE 6389-2G V50
• Manufacturer: Infineon Technologies

Specifications of TLE 6389-2G V50

• Packages: PG-DSO-14
• Comment: Vin up to 60V; external MOS
• Vq (max): 5.0V
• Iq (max): 2,300.0 mA
• Iq (typ): 130.0 µA
• Output: Buck Converter

Datasheet Rev. 2.1
Figure 3
7.3
The output voltage is sensed either by an internal voltage divider connected to the VOUT
pin (TLE6389-2 GV50 and TLE6389-3 GV50, fixed 5V versions) or an external divider
from the Buck output voltage to the FB pin (TLE6389-2 GV, adjustable version). Pin
VOUT has to be connected always to the Buck converter output regardless of the
selected output voltage for the -2GV version.
To determine the resistors of the feedback divider for the desired output voltage V
the TLE6389-2 GV select R
following formula:
V
the output voltage can be adjusted in a range from 1.25V to 15V. However the integrated
Reset function will only be operational if the output voltage level is adjusted to >7V.
Also the current consumption will be increased in PFM mode in the range between
1.25V and 7V.
400k
100k
R
R
FB
SI1
SI2
V
=
=
IN
is the threshold of the error amplifier with its value of typical 1.25V which shows that
100 F
C
IN1
=
C
220nF
IN2
Application circuit TLE6389-2 GV
Output voltage at adjustable version - feedback divider
=
13
7
VS
SI
SI_GND
BDS
R
11
6
220 nF
47m
C
SENSE
BDS
=
TLE6389-2 GV
=
ON OFF
ENABLE
CS
1
14
FB2
R
M1
SYNC
FB1
GDRV
between 5k
5
12
GND
=
4
R
VOUT
COMP
FB2
RO
3
SO
FB
10
D1
28
L
1
= 47 H


9
2
8
---------------- 1
V
680
V
FB th
and 500k
OUT
to e.g. 5V rail
2.2nF
–
to µC
to µC
R
R
20k


SO
RO
=
=
and obtain R
330k
R
R
47k
FB1
FB2
=
=
V
C
100 F
OUT
OUT
M1: Infineon BSO613SPV
D1: Motorola MBRD360
L1: EPCOS B82479-A1473-M
C
C
C
=
IN1
IN2
OUT
: Electrolythic
: Ceramic
Coilcraft DO3340P-473
: Low ESR Tantalum
Infineon BSP613P
FB1
TLE 6389
2007-08-13
with the
OUT
at