Rainbow Electronics MAX5099 - Manual (Page 26)

MAX5099
Dual, 2.2MHz, Automotive Synchronous Buck
Converter with 80V Load-Dump Protection
26 ______________________________________________________________________________________
BST2/VDD2
SOURCE2 SOURCE2
DL2
PGND
FB2
COMP2 PGOOD2
EN2
SYNC
31 1 32 32 29 6 7 4 5 9
C6
0.1
μ F D1
26 25 24 28
D2
C7
22
μ F
C2 4.7
μ F
35V
L1
4.7
μ H
C20 33pF
C9
2700pF
R9
12.7
Ω
C8
270pF R6
52.3k
Ω
1%
R22
10k
Ω
1%
R7
10k
Ω
1%
R8
976
Ω
1%
R12 6.49
Ω
C11 0.22
μ F
C12 2.2
μ F
C13 4.7
μ F
19 18 21
VOUT1 PGND SGND
20
V L
VDRV
BST1/VDD1 SOURCE1 SOURCE1 DL1 FB1 COMP1 PGOOD1 EN1
IN_HIGH
ON/OFF
GATE
V+
DRAIN1
DRAIN1
DRAIN2
DRAIN2
OSC
BYPASS
SGND
VDRV
V L
N1
R1 3.9k
Ω
12
22
23
2
3
11
10
13
C1 22
μ F
100V
C3 150
μ F
25V
C19 1μ
F
25V
C4 10
μ F
25V
C15 10
μ F
25V
8
16
VDRV
15
14
27
V IN
= 5.2V TO 19V
VOUT1 = 5V
AT
2A
MAX5099
VIN PGND
C14 0.1
μ F
D4
D5
C5 22
μ F
L2
4.7
μ H
C21 56pF C17
2700pF
R18 7.15
Ω
C16 270pF
R15
37.4k
Ω
1%
R23 10k
Ω
1%
R16 12.1k
Ω
1%
R17 976
Ω
1%
VOUT2 PGND SGND
VDRV
VOUT2 = 3.3V AT
1A
R21 1Ω
4
3
N2
6
5
2
1
JU4
17
1 2
V L
FSEL_1
R11
4
3
N3
1
2
5
6
Typical Application Circuit