RT6217A/B
Typical Application Circuit
RT6217A/B
V
IN
4.5V to 24V
2
C1
22µF
6
R
PGOOD
100k
VIN
BOOT 5
R3
20
C
BOOT
0.1µF
L
1.5µH
R1
6.49k
FB
8
R2
20k
C
FF
Option
C2
22µF
C3
22µF
Enable
EN
SW
3
V
OUT
1.05V
V
PGOOD
1 PGOOD
7
SS
C
SS
3.9nF
GND 4
Table 1. Suggested Component Values
V
OUT
(V)
1.05
1.2
1.8
2.5
3.3
5
Note :
R1 (k)
6.49
10.5
25.5
43.2
63.4
107
R2 (k)
20
20
20
20
20
20
L (H)
1.5
2.2
2.2
3.3
4.7
4.7
C
OUT
(F)
44
44
44
44
44
44
C
FF
(pF)
--
--
--
22 to 68
22 to 68
22 to 68
(1) 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.
(2) For lower output voltage applications, load transient responses can also be improved by adding a feedforward capacitor
(C
FF
, 22pF to 68pF).
Copyright
©
2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
8
DS6217A/B-01 October 2018
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
