DL6543A/B
RT6543A/B
Typical Application Circuit
VSYS
RT6543A/B
1
20
10
CS_DIS
VSYS
BOOT
0.1µF
0.1µF
11
12
13
14
UGATE
PH
2.2
15
0.22µH
PVCC
VCC
5V
5V
V
OUT
C
OUT
1µF
2.2
1µF
LGATE
PGND
16
2
3
8
100
ISENSEP
ISENSEN
VOUT
100
10k
4
AUX_SENSE
PGOOD
EN
820P
0.22µF
19
18
17
9
16.9k
1.4k
EN
5
COMP
VID0
VID1
VID0
VID1
15P
6
7
16.9k
FB
AUX_VSSSENSE
Refer to Table 1
FSWSEL set up
FSWSEL
FSWSEL
RGND
AGND
21 (Exposed pad)
COUT
ICL
Y-Line (PCS)
U-Line (PCS)
17
19
22
20
TGL
COUT type : 22F/6.3V
Table 1. FSWSEL set up
Frequency setting
800kHz
FSWSEL
High (>4.5V)
Floating (2~3V)
Low (<0.4V)
Suggestion
Connect to VCC
Floating
600kHz
400kHz
Connect to GND
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is a registered trademark of Richtek Technology Corporation.
DS6543A/B-01 March 2020
www.richtek.com
9
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