Datasheet
MAX8597/MAX8598/MAX8599
Low-Dropout, Wide-Input-Voltage,
Step-Down Controllers
14 ______________________________________________________________________________________
MAX8597
GNDCOMP
REFO
FB
VL
DL
LX
DH
BST
SS
19
20
18
5
3
1810
11
15
14
13
VL
VL
C5
0.22µF
C7A
47µF
C7B
47µF
C12
4.7µF
D1
CMDSH-3
Q2
IRF7821
Q1
IRF7821
L1
1µH
AIN-
V
IN
(10.8V TO 13.2V)
V
OUT
6V TO 12V/10A
EN
ON
OFF
C1
1µF
C3
0.01µF
C6
0.033µF
C9
820pF
C8
4.7pF
C10
100pF
R1
33.2kΩ
R2
1.21kΩ
R11
5.1kΩ
R8
24.9kΩ
R9
6.04kΩ
R10
93.1kΩ
AVL
R12
47kΩ
C2A
10µF
C2B
10µF
PGND
4
12
6
AOUT
R13
10Ω
AVL
AIN+
V
ADJ
(0V TO 5V)
R4
100kΩ
R5
32.4kΩ
R6
48.7kΩ
R7
48.7kΩ
C13
1µF
R14
2Ω
C14
2200pF
R15
3Ω
C15
0.01µF
2 7 17 9 16
REFIN EN FREQ V+ ILIM
C11
0.22µF
Figure 1. MAX8597 (600kHz): Live Adjustable Output Voltage from 6V to 12V at 10A
Figure 2. 1.2V at 20A Output with Remote Sensing
MAX8597
GNDCOMP
REFO
FB
VL
DL
LX
DH
BST
SS
19
20
18
5
3
1810
11
15
14
13
VL
VL
C7A
470µF
C7B
470µF
C12
4.7µF
D1
CMDSH-3
L1
0.7µH
AIN-
V
IN
(10.8V TO 13.2V)
V
OUT
1.2V/20A
EN
ON
OFF
C1
1µF
C3
0.01µF
C4
0.033µF
C9
6800pF
C8
39pF
C8
1800pF
R1
40.2kΩ
R2
1.65kΩ
R8
7.2kΩ
R7
12.1kΩ
R6
10kΩ
AVL
R10
16kΩ
C2A
10µF
C2C
10µF
C2B
10µF
PGND
4
12
6
AOUT
R11
10Ω
AVL
AIN+
R3
10kΩ
R4
10kΩ
R5
10kΩ
R9
12.1kΩ
C11
1µF
R12
3Ω
C13
2200pF
R14
3Ω
2 7 17 9 16
REFIN EN FREQ V+ ILIM
C10
0.22µF
Q2Q1
Q4Q3
(Q3 = Q4 =
IRF7832)
(Q1 = Q2 =
IRF7807Z)
C5
0.22µF
Design Procedure