RT6252A/B
Typical Application Circuit
R
BOOT
RT6252A/B
(Optional)
VIN
V
BOOT
IN
C
0.1μF
BOOT
C
C
IN
0.1μF
IN
L
10μF x 2
SW
V
OUT
C
C
FF
OUT
Enable
EN
R
R
FB1
FB
GND
FB2
Table 1. Recommended Components Selection
RFB1 (k)
VOUT (V)
RFB2 (k)
CFF (pF)
L (H)
COUT (F)
SOT-563 (FC)
TSOT-23-6 (FC)
5.0
3.3
2.5
1.8
1.5
1.2
1.0
54.9
33.2
22.6
13.7
9.53
5.76
3.09
52.3
30.9
21
10
10
10
10
10
10
10
10 to 100
10 to 100
10 to 100
10 to 100
--
3.3 to 4.7
3.3 to 4.7
3.3 to 4.7
2.2 to 4.7
2.2 to 4.7
2.2 to 4.7
2.2 to 4.7
20 to 68
20 to 68
20 to 68
20 to 68
20 to 68
20 to 68
20 to 68
12.4
8.66
4.87
2.4
--
--
Note :
(1) Please do not use a CFF higher than 100pF due to the noise coupling consideration.
(2) Considering effective capacitance de-rating which is related to biased voltage level and size, the effective
capacitance of COUT at target output level should meet the value in above table to make converter operated in
stable and normal.
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12
DS6252A/B-00 July 2019
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
