RT7237C Datasheet, PDF (6/15 Pages) Richtek Technology Corporation – RT7237C

RT7237C
Typical Application Circuit
V_IN
4.5V to 18V
Chip Enable
C_IN
10µF x 2
2 _VIN
BOOT ¹
RT7237C
SW ³
7 _EN
C_{BOOT L}
0.1µF _6.8µH
R1
75k
8 _SS
FB ⁵
C_SS
0.1µF
4, 9 (Exposed Pad)
GND
COMP ⁶
C_C
3.3nF
R_C
17k
R2
24k
V_OUT
3.3V
C_OUT
22µF x 2
C_P
Open
Table 1. Suggested Components Selection
V_OUT (V) R1 (kΩ) R2 (kΩ) R_C (kΩ) C_C (nF) L (μH)
8
27
3
40
3.3
15
5
62
11.8
25
3.3
10
3.3
75
24
17
3.3
6.8
2.5
25.5
12
13
3.3
4.7
1.5
10.5
12
7
3.3
3.6
1.2
12
24
6
3.3
2
1
3
12
5
3.3
2
C_OUT (μF)
22 x 2
22 x 2
22 x 2
22 x 2
22 x 2
22 x 2
22 x 2
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DS7237C-04 November 2012