RT7278
Typical Application Circuit
8
C1
10µF x 2
C2
0.1µF
1
5, 9 (Exposed Pad)
RT7278
6
SW
VIN
BOOT
FB
PVCC
7
2
3
C4
1µF
V
PVCC
R2
22.1k
L1
1.4µH
C6
0.1µF
C3
C7
22µF x 2
V
OUT
1.05V/3A
V
IN
Enable
EN
GND
R1
8.25k
C5
3.9nF
4 SS
Table 1. Suggested Component Values
V
OUT
(V)
1
1.05
1.2
1.8
2.5
3.3
5
7
R1 (kΩ)
6.81
8.25
12.7
30.1
49.9
73.2
124
180
R2 (kΩ)
22.1
22.1
22.1
22.1
22.1
22.1
22.1
22.1
C3 (pF)
--
--
--
5 to 22
5 to 22
5 to 22
5 to 22
5 to 22
L1 (μH)
1.4
1.4
1.4
2
2
2
3.3
3.3
C7 (μF)
22 to 68
22 to 68
22 to 68
22 to 68
22 to 68
22 to 68
22 to 68
22 to 68
Copyright
©
2013 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
6
DS7278-00 January 2013