Rainbow Electronics MAX15023 - Manual (Page 26)

MAX15023
Wide 4.5V to 28V Input, Dual-Output
Synchronous Buck Controller
26 ______________________________________________________________________________________
Typical Application Circuits (continued)
MAX15023
22
DH1
LIM2
9
BST2
SGND
11
20
DH2
IN
10
21
LX2
RT
12
19
BST1
LIM1
8
23
LX1
COMP1
7
24
5 14 DL1 DL2
4 15 PGOOD1 PGOOD2
6 13 PGND1 PGND2
3 16 V CC EN2
2 17 FB2 EN1
1 18 COMP2
V AUX
4.5V TO 5.5V
PGOOD2
V
OUT2
L2
V IN
3.3V
FB1
C8
R6 C6
Q1
Q2
C2
C IN2
C3
C5
C5
R2
R4
R PU1
R8
V IN
3.3V
R7
R1
R10 R9 R T R5
EN1
PGOOD1
V OUT1
L1
EN2
C IN1
C BST1 C BST2
C
OUT1
C4 R3
R PU2
Q3
Q4 C
OUT2
Figure 8. Application Diagram (Operation with Auxiliary 5V Supply and 3.3V Bus)