Owner manual

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
0.1μF
D1
26 25 24 28
D2
C7
22μF
C2 4.7μF 35V
L1
4.7μH
C20
33pF
C9
2700pF
R9
12.7Ω
C8
270pF
R6
52.3kΩ
1%
R22
10kΩ
1%
R7
10kΩ
1%
R8
976Ω
1%
R12 6.49Ω
C11 0.22μF
C12 2.2μF
C13 4.7μF
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 3.9kΩ
12
22 23 2 3
11
10
13
C1 22μF
100V
C3 150μF 25V
C19 1μF
25V
C4 10μF
25V
C15 10μF
25V
8
16
VDRV
15
1427
V
IN
= 5.2V
TO 19V
VOUT1 = 5V
AT 2A
MAX5099
VIN
PGND
C14 0.1μF
D4
D5
C5 22μF
L2
4.7μH
C21
56pF
C17
2700pF
R18
7.15Ω
C16 270pF
R15
37.4kΩ
1%
R23 10kΩ 1%
R16 12.1kΩ 1%
R17
976Ω
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