RT6343
Typical Application Circuit
300kHz, 3.3V, 3.5A Step-Down Converter
C
0.1µF
BOOT
RT6343GSP
V
2
3
1
8
L1
10µH
IN
VIN
BOOT
4.5V to 42V
V
OUT
C1
2.2µF
C2
2.2µF
SW
3.3V/3.5A
D1
SS5P6
R1
31.6k
C5
47µF
C6
47µF
EN
Enable Signal
5
FB
C3
10nF
R3
4.99k
R2
10k
6
COMP
C4
270pF
R
332k
RT
4
RT/SYNC
PAD
GND
7
9 (Exposed pad)
f
= 300kHz
SW
L1 = VCHA075D-100MS6
C5/C6 = GRM32ER61C476KE15L
C1/C2 = HMK316AC7225KL-TE
400kHz, 5V, 3.5A Step-Down Converter
C
0.1µF
BOOT
RT6343GSP
V
IN
2
1
8
L1
VIN
BOOT
SW
8V to 42V
10µH
V
OUT
C1
2.2µF
C2
2.2µF
5V/3.5A
D1
SS5P6
R1
52.3k
3
C5
47µF
C6
47µF
EN
Enable Signal
5
FB
R2
10k
C5
8.2nF
R3
10k
6
COMP
C6
100pF
R
249k
RT
4
RT/SYNC
PAD
GND
7
f
= 400kHz
SW
9 (Exposed pad)
L1 = VCHA075D-100MS6
C5/C6 = GRM32ER61C476KE15L
C1/C2 = HMK316AC7225KL-TE
400kHz, 12V, 3.5A Step-Down Converter
C
0.1µF
BOOT
RT6343GSP
V
2
3
1
9
IN
L1
22µH
VIN
BOOT
14V to 42V
V
OUT
C1
2.2µF
C2
2.2µF
SW
12V/3.5A
D1
SS5P6
R1
140k
C5
10µF
C6
10µF
C7
10µF
EN
Enable Signal
8
FB
R2
10k
C3
8.2nF
R3
6.34k
6
COMP
R
249k
RT
C4
150pF
4
RT/SYNC
PAD
GND
7
9 (Exposed pad)
f
= 400kHz
SW
L1 = 7443551221
C6/C7/C8 = UMK325AB7106KM
C1/C2 = HMK316AC7225KL-TE
Copyright 2019 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
14
DS6343-00 October 2019
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
