SC2440A Datasheet, PDF (26/28 Pages) Semtech Corporation – Dual 30V Step-Down Switching Regulator with 2A Switches

Typical Application Circuits (Continued)
R5
14.3k
C7
C5
470pF
22nF
R9
15.4k
C10
22nF
R7
10.2k
C8
680pF
FB1 PGOOD1
COMP1
BST1
SS1
SW1
SYNC
ROSC
IN
SC2440A
SS2
COMP2
SW2
GND
BST2
FB2 PGOOD2
R6
100k
D3
C2
0.1mF
BAT54
L1
VIN = 5V ± 10%
C15
2.2mH
D1
B120
4.7mF
D4
1N4148
R8
100k
D2
B120
L2
2.2mH
C4
0.1mF
OUT1
C1
22mF
R1
15.0k
R2
10k
2.5V/1.8A
OUT2
C3
22mF
1.8V/1.8A
R3
8.06k
R4
10k
L1, L2: Coiltronic LD1
C1, C3: Murata GRM21BR60J226M
C15: Murata GRM21BR60J475K
SC2440A
Figure 17. 1.2MHz 5V to 2.5V and 1.8V Step-down Converter.
1.1MHz
26