RT6248B
Typical Application Circuit
RT6248B
PGOOD
7
1
V
PGOOD
R
BOOT
BOOT
5
C
0.1µF
BOOT
V
10
IN
VIN
C
IN
4.5V to 18V
10µF/50V x 2
L
2, 3
V
OUT
LX
9
1.4µH
V
3.3V/8A
CC
VCC
C
68pF
FF
C
1µF
VCC
R1
90.9k
R
FF
C
OUT
22µF/6.3V x 4
(Optional)
12
6
10
8
V
ILMT
ILMT
EN
FB
R2
20k
R
EN
V
EN
1k
AGND
4
PGND
BYP
11
V
BYP
R
C
1µF
BYP
BYP
(Optional)
Note : All the input and output capacitors are the suggested values, referring to the effective capacitances, subject to any de-
rating effect, like a DC bias.
Table 1. Suggested Component Values
VOUT (V)
R1 (k)
13.3
20
R2 (k)
20
L (H)
0.68
0.68
1
COUT (F)
CFF (pF)
82
1
1.2
1.8
2
22x4/0805/6.3V
22x4/0805/6.3V
22x4/0805/6.3V
22x4/0805/6.3V
22x4/0805/6.3V
22x4/0805/6.3V
20
82
40.2
46.6
90.9
147
20
82
20
1.4
82
3.3
5
20
1.4
68
20
2.2
68
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8
DS6248B-01 May 2018
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
